CN101483357B - Power transmission control device, power transmitting device, non-contact power transmission system, electronic instrument, and power transmission control method - Google Patents

Power transmission control device, power transmitting device, non-contact power transmission system, electronic instrument, and power transmission control method Download PDF

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CN101483357B
CN101483357B CN2009100001268A CN200910000126A CN101483357B CN 101483357 B CN101483357 B CN 101483357B CN 2009100001268 A CN2009100001268 A CN 2009100001268A CN 200910000126 A CN200910000126 A CN 200910000126A CN 101483357 B CN101483357 B CN 101483357B
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electricity
transmission
power transmitting
transmitting device
load
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CN101483357A (en
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大西幸太
神山正之
盐崎伸敬
上条贵宏
长谷川稔
曾我部治彦
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Seiko Epson Corp
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Abstract

The present invention provides a power transmission control device, a power transmitting device, a non-contact power transmission system, an electronic instrument, and a power transmission control method. The invention may improve reliability, convenience, and reduce power consumption, size and cost of the non-contact power transmission system. A power transmission control device (20) provided in a power transmitting device (10) includes a power-transmitting-side control circuit (22) that controls power transmission to a power receiving device (40), the power-transmitting-side control circuit (22) causing the power transmitting device (10) to perform intermittent temporary power transmission, detecting a response from the power receiving device (40) that has received the power due to the temporary power transmission to automatically detect installation of a power-receiving-side instrument (510), and causing the power transmitting device (10) to perform continuous normal power transmission to the power receiving device (40) when the installation of the power-receiving-side instrument has been detected. A foreign object detection process may also be performed in combination.

Description

Power transmission control device, power transmitting device, non-contact power transmitting system, electronic equipment and power transmission control method
Technical field
The present invention relates to a kind of power transmission control device, power transmitting device, non-contact power transmitting system, electronic equipment and power transmission control method etc.
Background technology
In recent years; Utilize electromagnetic induction; Contactless electric power transfer (noncontact electric power transfer) that also can transferring electric power even without the contact of metal section and part has received widely to be paid close attention to; As the suitable example of so contactless electric power transfer, the charging of pocket telephone or home-use equipment (for example, the handset of telephone set or clock and watch) etc. has been proposed.
Utilize the contactless power transmission device of primary coil and secondary coil for example to be documented in the patent documentation 1.
[patent documentation 1] TOHKEMY 2006-60909 communique
In contactless power transmission device, for example longer for battery (storage battery) life-span that makes electronic equipment, be strict with low power capabilities.Thereby, need to control from transmission of electricity side apparatus (transmission of electricity side apparatus) to the unnecessary electric power transfer that receives electric side (receiving electric side apparatus) as far as possible.
And, in contactless power transmission device, the most important for the requirement of high security and reliability.For example, if receive electric side apparatus transferring electric power to non-compliant by error, the situation of device damage can take place then.
And even under the standard compliant situation that receives electric side apparatus transferring electric power, the transmission of electricity environment is uncomfortable when suitable, just must stop to transmit electricity.For example, when under having the environment of metallic foreign body, transmitting electricity, there is the danger that abnormal heating takes place, at this moment just must stops transmission of electricity.But; About the size of metallic foreign body, the metallic foreign body of existing middle or small degree (for example also has very big metallic foreign body; Be lamellar, can block the transmission of electricity side apparatus fully and receive the metallic foreign body of electric side apparatus), preferably all can take Security Countermeasures for any foreign matter.
And contactless power transmission device is a purpose with the convenience that improves in user's daily life, therefore, should be device easy to use.And, in contactless power transmission device, reduce number of components, realize that miniaturization and cost degradation also are very important.
Summary of the invention
Can provide a kind of for example user ease of use higher and can suppress the contactless power transmission technology of power consumption according to several embodiments of the present invention.And, a kind of contactless power transmission technology of having taked the high reliability of perfectly sound Security Countermeasures for example can be provided.And, for example at least one execution mode of the present invention, can reduce number of components, and realize the miniaturization and the cost degradation of non-contact power transmitting system.
(1) power transmission control device of the present invention mode is a kind of power transmission control device; This power transmission control device is arranged in the above-mentioned power transmitting device of non-contact power transmitting system; Above-mentioned non-contact power transmitting system from power transmitting device via the primary coil of electromagnetic coupled and secondary coil with contactless mode to the current-collecting device transferring electric power; Above-mentioned power transmission control device comprises: transmission of electricity side control circuit; Be used to control transmission of electricity to above-mentioned current-collecting device; Above-mentioned transmission of electricity side control circuit makes above-mentioned power transmitting device carry out temporary transient transmission of electricity at intermittence, and detects and come from based on the replying of the above-mentioned current-collecting device of the above-mentioned electric power of above-mentioned temporary transient transmission of electricity, and the electric side apparatus that receives that detects above-mentioned current-collecting device thus is set at the position that can receive electricity through contactless electric power transfer; Detect above-mentioned receive electric side apparatus be set at can through contactless electric power transfer receive the electricity the position time; Above-mentioned transmission of electricity side control circuit makes above-mentioned power transmitting device carry out the continuous normal transmission of electricity for above-mentioned current-collecting device, and when not detecting above-mentioned the setting, above-mentioned transmission of electricity side control circuit makes above-mentioned power transmitting device continue to carry out the state of above-mentioned intermittent temporary transient transmission of electricity.
Carry out intermittent temporary transient transmission of electricity through power transmitting device, and detect and come from replying of the current-collecting device of having accepted temporary transient transmission of electricity, detect the setting that receives electric side apparatus automatically.Detect the precondition that is set to begin normal transmission of electricity.Do not detecting when being provided with, power transmitting device continues intermittently temporarily to transmit electricity and waits for the initial condition of the setting that receives electric side apparatus.For example can automatically and repeat above a series of actions.The user need not to carry out switching manipulation etc. as long as setting receives electric side apparatus (current-collecting device), significantly improves user's ease of use.And,,, can realize province's electrification so only need minimum power consumption to get final product because intermittently temporarily transmit electricity.Above-mentioned " temporary transient transmission of electricity " is meant in (the successional transmission of electricity that the is used to power to the load) transmission of electricity before of normally transmitting electricity to current-collecting device, for example, is intermittent transmission of electricity.About the transmission frequency of temporary transient transmission of electricity, in principle can be regardless of its whether identical with the frequency of normal transmission of electricity.And " normal transmission of electricity " is to point to the transmission of electricity according to the script purpose (for example, being used for the transmission of electricity that such load is charged to storage battery) that electric power that the current-collecting device lateral load carries out is supplied with.
(2) in another mode of power transmission control device of the present invention, above-mentioned transmission of electricity side control circuit is detecting above-mentionedly when receiving being provided with of electric side apparatus, and carries out the ID authentication processing, if above-mentioned ID authentication success then makes above-mentioned power transmitting device carry out normal transmission of electricity.
In this mode, before carrying out normal transmission of electricity, carry out the ID authentication.Therefore, can prevent reliably to carry out unnecessary transmission of electricity to underproof object.That is, when the ID authentification failure, the electric side apparatus that receives that expression has been provided with is not suitable for as the transmission of electricity object.Therefore, power transmitting device can normally not transmitted electricity, but keeps the state (initial condition) that carries out intermittent temporary transient transmission of electricity.Therefore, can prevent reliably to have improved the reliability and the fail safe of non-contact power transmitting system to unsuitable object supply capability.Here, can comprise the coding of for example representing the producer, device id number, electric power rated value information etc. in " ID authentication information ".
(3) in the other type of power transmission control device of the present invention; Above-mentioned transmission of electricity side control circuit detects the setting that receives electric side apparatus that comprises above-mentioned current-collecting device according to begin whether can receive at the appointed time the ID authentication information that comes from above-mentioned current-collecting device in the zero hour from above-mentioned temporary transient transmission of electricity.
Transmission of electricity side control circuit is a condition to begin the receiving ID authentication information that comes from current-collecting device at the appointed time in the zero hour from temporary transient transmission of electricity, detects the setting that receives electric side apparatus.That is, receive electric side apparatus, then under the situation of temporarily transmitting electricity, at the appointed time replying of ID authentication information should be arranged if be provided with.Therefore, can whether return at the appointed time, detect the setting that receives electric side apparatus according to the ID authentication information.
(4) in another mode of power transmission control device of the present invention; Above-mentioned transmission of electricity side control circuit has judged whether foreign matter according to the wave form varies of the induced voltage signal of above-mentioned primary coil; When in above-mentioned normal transmission of electricity process, detecting foreign matter; Above-mentioned transmission of electricity side control circuit makes above-mentioned power transmitting device stop above-mentioned normal transmission of electricity, above-mentioned power transmitting device is returned to carry out the temporary transient state of transmitting electricity of above-mentioned intermittence.
Transmission of electricity side control circuit detects foreign matter (foreign conducting matter, for example metallic foreign body) during normal transmission of electricity, when detecting foreign matter, make power transmitting device stop normal transmission of electricity, makes power transmitting device return to initial condition (carrying out the state of intermittent temporary transient transmission of electricity).Insert foreign matter between primary coil and the secondary coil, then become main causes such as abnormal heating, scald or fire, therefore, the foreign matter countermeasure is very important.For example, if there is foreign matter to exist, the load of then looking sideways from transmission of electricity that receives electric side increases, and therefore, the waveform of the induced voltage signal of primary coil changes.So utilize this principle, can detect foreign matter through the circuit of simple formation.Through implementing the foreign matter countermeasure, significantly improved the fail safe and the reliability of non-contact power transmitting system.
(5) in another mode of power transmission control device of the present invention; Above-mentioned transmission of electricity side control circuit detects the above-mentioned removal that receives electric side apparatus according to the wave form varies of the above-mentioned induced voltage signal of above-mentioned primary coil; When in above-mentioned normal transmission of electricity process, detecting the removal of above-mentioned current-collecting device; Above-mentioned transmission of electricity side control circuit makes above-mentioned power transmitting device stop above-mentioned normal transmission of electricity, makes above-mentioned power transmitting device return to the state of carrying out the temporary transient transmission of electricity of above-mentioned intermittence simultaneously.
If in the process of normal transmission of electricity, remove and receive electric side apparatus, then the coupling between primary coil and the secondary coil breaks away from, and the body portion that interacts that produces because of coupling disappears; Has only the inductor partial resonance of primary coil; Consequently, resonance frequency uprises, near transmission frequency; Therefore electric current flows in the transmission of electricity coil easily, can regard high capacity (induced voltage rising) as from the transmission of electricity side.That is, the waveform of the induced voltage signal of primary coil changes.Therefore, utilize this principle, can " receive the removal of electric side apparatus " through constituting simple electric circuit inspection.And, under the situation of the regular load authentication that is used to occupy detection, also can remove according to the break detection of the regular load authentication in normal transmission of electricity process.Through in normal transmission of electricity process, detected by the removal of electric side apparatus, can not produce unnecessary electric power transfer.Therefore, can realize low-power consumption and raising fail safe and reliability.
(6) in the other type of power transmission control device of the present invention; Above-mentioned transmission of electricity side control circuit detects the state of occupying; If in above-mentioned normal transmission of electricity process, detect the state of occupying; Then make above-mentioned power transmitting device stop above-mentioned normal transmission of electricity; Above-mentioned power transmitting device is returned to carry out the state of the temporary transient transmission of electricity of above-mentioned intermittence, wherein, the above-mentioned state of occupying is to think by mistake and above-mentionedly receive electric side apparatus and continue the state of above-mentioned normal transmission of electricity being arranged on foreign matter between above-mentioned primary coil and the above-mentioned secondary coil.
During normal transmission of electricity, the detection of so-called through carrying out " occupying state ", thus further improved the fail safe and the reliability of non-contact power transmitting system." occupying state " is to be confirmed as the special state that inserts foreign matter, is meant " foreign matter being thought by mistake the state that receives electric side apparatus and continue normal transmission of electricity ".For example, when sheet metal is inserted into to block state between primary coil and the secondary coil fully,, then become the load that has certain degree all the time, for example be difficult to remove detection if observe from the transmission of electricity side.In other words,, observe, also can detect the load that is equivalent to receive electric side apparatus, therefore, can't detect removal, can't stop normal transmission of electricity from the transmission of electricity side even after removal receives electric side apparatus.At this moment, metallic plate reaches a high temperature, and danger such as abnormal heating or fire, equipment breakage, scald might take place.Except " foreign matter detection ", " remove detect ", " occupying detection " function also is set, when detecting when occupying state, stop normal transmission of electricity rapidly.Thus, can further improve the fail safe and the reliability of non-contact power transmitting system.
(7) in the other type of power transmission control device of the present invention; If there is above-mentioned foreign matter; The signal that above-mentioned current-collecting device sends is owing to being blocked by foreign matter and can't arriving above-mentioned power transmitting device, and in view of the above, above-mentioned then above-mentioned transmission of electricity side control circuit detects the above-mentioned state of occupying.
If become " occupying state ", blocked by foreign matter from the signal transmission that carried out by electric side direction transmission of electricity side so, can't arrive the transmission of electricity side.Utilize this principle, send arbitrary signal, whether can receive this signal according to the transmission of electricity side and detect the state of occupying from receiving electric side direction transmission of electricity side.For example, current-collecting device sends signal (physical property signal) via secondary coil and primary coil to the transmission of electricity side through load-modulate, judges the state of occupying according to whether detecting this signal (physical property signal) in the transmission of electricity side.But, be not limited to this method.For example, also can receive electric side that luminescence unit is set, light receiving unit is being set, detect " occupying state " according to whether detecting from the light that receives electric side (comprising ultraviolet ray etc.) in the transmission of electricity side in the transmission of electricity side.Whether also can detect outer light (ambient light) is not blocked by foreign matter and arrives power transmitting device.Except the signal of telecommunication or light, can also occupy detection according to the sound that whether detects specified level in the transmission of electricity side from receiving electric side.
(8) in the other type of power transmission control device of the present invention; Above-mentioned transmission of electricity side control circuit detects from the intermittence of the load of the above-mentioned current-collecting device side of above-mentioned power transmitting device observation and changes; And, detect the above-mentioned state of occupying according to the intermittence variation that in above-mentioned normal transmission of electricity process, whether detects above-mentioned load.
Current-collecting device is (for example, to as the battery pack supplying charging current of load the time) when finishing the ID authentication and normally transmitting electricity, and load-modulate portion is moved, and load is intermittently changed.The intermittent load variations of current-collecting device side (that is to say with predetermined timing; The timing that power transmitting device is known: for example regular timing) carry out, therefore, short of foreign matter inserts; The intermittent load that power transmitting device just should can detect the current-collecting device side all the time changes; On the contrary, when the intermittent loads that can't detect the current-collecting device side changes, can be judged as and be inserted with foreign matter.The load-modulate portion that current-collecting device comprises effectively is used in foreign matter with this load-modulate portion and detects in order to send information to power transmitting device and to be provided with, and need not to be provided for detecting the special special hardware of foreign matter.And; Since as the means that communicate from the current-collecting device side; Except that adopting the load-modulate mode, also be provided with the formation that detects load variations in the power transmitting device certainly, move as long as be used in being formed in the normal transmission of electricity process of this load variations of detection; Can judge that foreign matter inserts, thereby the power transmitting device side also need not to establish in addition new hardware.And; For example pass through the wave form varies of the induced voltage signal of detection of primary coil, can detect the load variations (still, being not limited to this detection method) of current-collecting device side fairly simplely; And, can detect accurately through general Digital Signal Processing.And; Utilize and the identical path (that is) of normally transmitting electricity, carry out from the transmission based on the signal of load-modulate of current-collecting device to power transmitting device via the route of primary coil and secondary coil; Therefore, need not to be provided for especially detecting the signal transmission route that foreign matter inserts.Therefore, through constructing contactless transmission system, can be through simple signal processing in control assembly quantity, detecting to pinpoint accuracy has the larger area foreign matter to insert (occupying) between primary coil and secondary coil.
(9) in the other type of power transmission control device of the present invention; Load-modulate through above-mentioned current-collecting device; The duty cycle property ground of the current-collecting device side of observing from above-mentioned power transmitting device in the above-mentioned normal transmission of electricity process changes, and whether above-mentioned transmission of electricity side control circuit basis can be consecutively detected above-mentioned load variations in the cycle of specified quantity detects the above-mentioned state of occupying.
Because it is prudent to occupying the status detection expectation; So; Transmission of electricity side control circuit detects the load variations of current-collecting device side corresponding to each cycle in a plurality of cycles, when not detecting load variations continuously in the cycle (for example 3 cycles) at stated number, makes power transmitting device stop normal transmission of electricity.Thereby, improved the detection accuracy that causes the foreign matter insertion of occupying, for example in the time can't detecting load variations, can not stop the situation of normal transmission of electricity owing to chance cause with making a mistake.
(10) in the other type of power transmission control device of the present invention; Above-mentioned transmission of electricity side control circuit detects in above-mentioned normal transmission of electricity process and comes from when being full of of above-mentioned current-collecting device is electric to be notified; Make above-mentioned power transmitting device stop above-mentioned normal transmission of electricity; Transmission of electricity and the judgement that above-mentioned power transmitting device is carried out be full of removal behind the electricity to detect usefulness is full of the transmission of electricity that whether need recharge usefulness behind the electricity; According to the input of sending during to above-mentioned removal from the above-mentioned current-collecting device of having accepted to be used for the transmission of electricity that the above-mentioned removal that is full of behind the electricity detects; Above-mentioned power transmitting device is returned to carry out the state of the temporary transient transmission of electricity of above-mentioned intermittence,, make above-mentioned power transmitting device begin above-mentioned normal transmission of electricity once more according to above-mentioned when being full of behind the electricity signal that above-mentioned current-collecting device that needs whether recharge the transmission of electricity of usefulness sends and judging needs and recharge from having accepted to judge.
Transmission of electricity side control circuit the load that receives electric side apparatus become be full of electricity after, further monitor load condition, and recharge management automatically.That is, be full of under the situation about still being set up after the electricity when become by electric side apparatus, along with the process of time, load (storage battery) discharge can become the state that need recharge.Therefore, detect be full of electricity after, carry out replacing the transmission of electricity of normal transmission of electricity (can be intermittent transmission of electricity; Also can be the continuous transmission of electricity flat that changes frequency) than light current; Automatically judge whether load need recharge, and recharges if desired, then begin transmission of electricity once more.Thus, automatically perform recharging of load.Thereby even be full of under the long-time situation of placing of electric back quilt by electric side apparatus, when user's use received electric side apparatus, storage battery was in all the time and is full of electricity condition.Therefore, can not take place specially to charge, but because discharge afterwards, the result becomes not the fully unfavorable condition of charged state, thus the expectation that can not fail to live up to the user.But, after being full of electricity, remove when receiving electric side apparatus, need not to recharge management.Therefore, also executed in parallel is full of the transmission of electricity that is used to remove detection behind the electricity (can be intermittent transmission of electricity, also can be the continuous transmission of electricity flat than light current of above-mentioned change frequency).If do not reply, can be judged as so and be removed by electric side apparatus from the electric side apparatus that receives of having accepted to be used to remove the intermittence transmission of electricity of detection.If detect removal, then power transmitting device returns to initial condition.In addition, the meaning of above-mentioned " being full of " can for example broadly be interpreted as " load condition of current-collecting device side is a specified states ".So load is not limited to storage battery.For example, also can there be the allocated circuit that receives electric side apparatus to become the situation of load.That is, for example " allocated circuit is the action work is gone forward side by side in acceptance from the transmission of electricity of power transmitting device after, and this allocated circuit becomes the state that need not to move " is equivalent to the situation that load is full of electricity, and this situation also belongs in the technical scope of this mode.
(11) in the other type of power transmission control device of the present invention; The transmission of electricity that above-mentioned detection is full of the removal use behind the electricity is the intermittence transmission of electricity based on the period 1; Judge and above-mentionedly be full of the transmission of electricity that whether need recharge use behind the electricity and be intermittence transmission of electricity based on second round; The above-mentioned period 1 is longer than the cycle of the temporary transient transmission of electricity of above-mentioned intermittence, and above-mentioned second round is greater than the above-mentioned period 1.
Based on the viewpoint that reduces power consumption, the transmission of electricity that is full of behind the electricity is preferably carried out with suitable periodic intermittent ground.And removal detects the intermittence transmission of electricity of usefulness and recharges the intermittence transmission of electricity of managing usefulness and there is no need to carry out too continually, and for fear of unnecessarily increasing power consumption, preferably carries out with the suitable cycle.Therefore, in this mode, remove the intermittence that detects usefulness with the period 1 and transmit electricity, to recharge the intermittence transmission of electricity of management usefulness second round.Why both being divided into period 1 and second round, is because expectation basis purpose is separately optimized the cycle.And, receiving the importance of the setting of electric side apparatus from fast detecting, the intermittent temporary transient transmission of electricity under the initial condition is preferably carried out with the very short cycle (for example, smaller or equal to 1 second cycle).On the contrary,, do not have special problem yet,, then increase unnecessary power consumption if remove detection continually even the removal detection that is full of behind the electricity is longer than the cycle of temporary transient transmission of electricity.Therefore, will be full of the period 1 that the removal behind the electricity detects to be set at the cycle (for example, several minute cycle) longer, thereby suppress the increase of power consumption than the cycle of temporary transient transmission of electricity.And; Being full of frequency that whether recharging behind the electricity need detect can be lower (is full of after the battery discharging of electricity and can takes a long time till recharging to needs; Even and recharge and whether to judge to have slightly and delay; On reality is used, also have no problem), be set at than period 1 longer (for example being set at the cycle about tens of branches) so be used to be full of the second round of electro-detection.Thus, can be to carry out the intermittence transmission of electricity corresponding to purpose cycle separately, with power consumption control in irreducible minimum.
(12) other type of power transmission control device of the present invention is arranged on the power transmission control device in the power transmitting device of current-collecting device transferring electric power, and above-mentioned power transmission control device comprises: position detection part is used to detect the position of above-mentioned current-collecting device; And transmission of electricity control part; Be used to control the action of above-mentioned power transmitting device, wherein, above-mentioned transmission of electricity control part makes above-mentioned power transmitting device carry out intermittent transmission of electricity; Detect when coming from the replying of the above-mentioned current-collecting device of having accepted above-mentioned intermittent transmission of electricity at above-mentioned position detection part; Above-mentioned transmission of electricity control part is transmitted electricity above-mentioned power transmitting device continuously, and when above-mentioned position detection part did not detect above-mentioned replying, above-mentioned transmission of electricity control part made above-mentioned power transmitting device continue above-mentioned intermittent transmission of electricity.
In this mode, power transmission control device is arranged in the power transmitting device of current-collecting device transferring electric power.Power transmitting device carries out the intermittence transmission of electricity.Position detection part detects and to come from replying of the current-collecting device of having accepted intermittent transmission of electricity.Detect when replying at position detection part, beginning is transmission of electricity continuously, not detecting when replying, does not begin continuous transmission of electricity, but continues intermittently transmission of electricity.The user only need be provided with and got final product by electric side apparatus (current-collecting device), need not to carry out switching manipulation etc., thereby has significantly improved user's ease of use.And, during intermittently transmitting electricity, suppressed power consumption, can realize province's electrification.
(13) supply with the transmission of electricity portion of primary coil after power transmitting device of the present invention comprises above-mentioned power transmission control device and generates alternating voltage.
Thus, realized aforesaid new power transmitting device, promptly, this new power transmitting device has the function that automatic detection receives the setting of electric side apparatus and automatically performs the basic order that is used for switching on to load.And, can realize the new power transmitting device of advanced function more that has that is described below, promptly, not only can detect setting automatically, can also automatically perform to be full of and recharge management (and the removal that is full of behind the electricity detects) behind the electricity.
(14) in a mode of non-contact power transmitting system of the present invention; It is a kind of non-contact power transmitting system; Via by the primary coil of electromagnetic coupled and secondary coil from power transmitting device to the contactless transferring electric power of current-collecting device; Wherein, above-mentioned power transmitting device comprises transmission of electricity side control circuit, and above-mentioned transmission of electricity side control circuit is controlled the transmission of electricity to above-mentioned current-collecting device according to the induced voltage of primary coil; Above-mentioned current-collecting device comprises the power supply control part and receives controller for electric consumption; Above-mentioned power supply control part is used to control to be supplied with the electric power of load, the above-mentioned electric side control circuit that receives that comprised by controller for electric consumption to be used to control above-mentioned current-collecting device, and the above-mentioned transmission of electricity side control circuit of above-mentioned power transmitting device makes above-mentioned power transmitting device carry out intermittent temporary transient transmission of electricity; Come from through detection and to receive replying based on the above-mentioned current-collecting device of the above-mentioned electric power of above-mentioned temporary transient transmission of electricity; Detect the electric side apparatus that receives that comprises above-mentioned current-collecting device and be set at the position that can receive electricity, when detecting above-mentioned the setting, make above-mentioned power transmitting device carry out continuous normal transmission of electricity above-mentioned current-collecting device through contactless electric power transfer; When not detecting above-mentioned the setting, make above-mentioned power transmitting device continue to carry out the state of the temporary transient transmission of electricity of above-mentioned intermittence.
Thus, can realize having the new power transmitting device of following function: automatically detect the setting that receives electric side apparatus, and be precondition, automatically perform the basic sequential of switching on automatically to load with the detection that is provided with.The non-contact power transmitting system of this mode has good user's ease of use, low-power consumption property, reliability and fail safe.
(15) in the other type of non-contact power transmitting system of the present invention; Above-mentioned current-collecting device is carried out intermittent temporary transient transmission of electricity; According to beginning whether can receive at the appointed time the ID authentication information of replying the zero hour as from above-mentioned current-collecting device from above-mentioned temporary transient the transmission of electricity; Detect the above-mentioned above-mentioned setting that receives electric side apparatus,, then utilize the ID authentication information of above-mentioned reception to carry out the ID authentication processing of above-mentioned current-collecting device if detect above-mentioned setting; If ID authentication success; Then make above-mentioned power transmitting device that above-mentioned current-collecting device is carried out continuous normal transmission of electricity, when not detecting above-mentioned the setting and during above-mentioned ID authentification failure, make above-mentioned power transmitting device continue to carry out the state of the temporary transient transmission of electricity of above-mentioned intermittence.
Thus, can realize having the new power transmitting device of following function: automatically detect the setting that receives electric side apparatus, and be condition, automatically perform the reasonably basic sequential of switching on from the trend load with the success of ID authentication.The non-contact power transmitting system of this mode has good user's ease of use, low power consumption property, reliability and fail safe.
(16) in the other type of non-contact power transmitting system of the present invention; During above-mentioned normal transmission of electricity; Above-mentioned transmission of electricity side control circuit has judged whether foreign matter according to the wave form varies of the induced voltage signal of above-mentioned primary coil; When detecting foreign matter, above-mentioned transmission of electricity side control circuit makes above-mentioned power transmitting device stop above-mentioned normal transmission of electricity, makes above-mentioned power transmitting device return to the state of carrying out the temporary transient transmission of electricity of above-mentioned intermittence simultaneously.
Foreign matter between primary coil and the secondary coil inserts the main cause that becomes abnormal heating, scald or fire etc., and therefore, the foreign matter countermeasure is extremely important.For example, if there is foreign matter, the load of then observing from the transmission of electricity side that receives electric side increases, thereby the waveform of the induced voltage signal of primary coil changes.Therefore, utilize this principle, can use the electric circuit inspection foreign matter of simple formation.Through implementing the foreign matter countermeasure, improved the fail safe and the reliability of non-contact power transmitting system more.
(17) in the other type of non-contact power transmitting system of the present invention; Above-mentioned current-collecting device also comprises load-modulate portion; After above-mentioned normal transmission of electricity begins, above-mentionedly receive electric side control circuit that above-mentioned load-modulate portion is moved, and carry out regular load-modulate; The above-mentioned transmission of electricity side control circuit of above-mentioned power transmitting device detects from the regular variation of the above-mentioned current-collecting device lateral load of above-mentioned power transmitting device observation; In above-mentioned normal transmission of electricity process,, make above-mentioned power transmitting device stop above-mentioned normal transmission of electricity if when not detecting the regular variation of above-mentioned load.
Through beginning the regular load authentication after the normal transmission of electricity, the countermeasure in the time of can realizing " occupying state " takes place.Therefore, the reliability and the fail safe of non-contact power transmitting system have been improved more.
(18) in the other type of non-contact power transmitting system of the present invention, above-mentioned current-collecting device comprises the electro-detection portion that is full of, and the above-mentioned electro-detection portion that is full of is used to detect being full of of above-mentioned load; Detecting when being full of electricity through the above-mentioned electro-detection portion that is full of; Above-mentionedly receive electric side control circuit to make above-mentioned load-modulate portion carry out load-modulate, and send to above-mentioned power transmitting device and to be full of the electricity notice, in above-mentioned normal transmission of electricity process; When detecting when being full of the electricity notice from above-mentioned current-collecting device above-mentioned; Above-mentioned transmission of electricity side control circuit makes above-mentioned power transmitting device stop normal transmission of electricity, simultaneously, also carries out the intermittence transmission of electricity based on the period 1 that the removal be full of behind the electricity detects usefulness; And be full of the intermittence transmission of electricity that judges whether to recharge usefulness behind the electricity based on second round; According to signal,, make above-mentioned power transmitting device return to the state of carrying out intermittent temporary transient transmission of electricity if when detecting above-mentioned removal from having accepted to send based on the above-mentioned above-mentioned current-collecting device that is full of the intermittence transmission of electricity of the period 1 behind the electricity; And; Signal according to from having accepted to send based on the above-mentioned above-mentioned current-collecting device that is full of the transmission of electricity at intermittence of the second round behind the electricity if judge in the time of need recharging, then makes above-mentioned power transmitting device begin normal transmission of electricity once more.
Thus, can be implemented in the load that receives electric side apparatus becomes and is full of the non-contact power transmitting system of also monitoring load condition behind the electricity and recharging management automatically.Therefore, can realize further having improved the non-contact power transmitting system of ease of use.
(19) in the other type of non-contact power transmitting system of the present invention; During above-mentioned normal transmission of electricity; When making above-mentioned load-modulate portion carry out above-mentioned regular load-modulate; Above-mentionedly receive electric side control circuit through the above-mentioned power supply control part of control, the electric power of above-mentioned load is supplied with in mandatory reduction, and carries out the load reduction obviously alleviate above-mentioned load and handle.
In the non-contact power transmitting system of this mode, current-collecting device carries out load reduction when carrying out the intermittent loads modulation handles.Transmit electricity and when being used to detect the load-modulate of the state of occupying, should send the influence that receives the power supply situation (in other words, the load condition of load) that carries out for load usually to load not stopping based on signal of load-modulate for the power transmitting device side.For example; When a large amount of charging currents is supplied with in load (battery pack etc.); Even on/off less current for load-modulate; The amount of the electric current that this is switched on/breaks off is lacked than the magnitude of current of the charging current of load, therefore, is difficult to detect the situation of the load variations that load-modulate causes in the power transmitting device side.Therefore; In this mode; In normal transmission of electricity process; The load condition of current-collecting device monitoring load (for example battery pack) itself, when carrying out load-modulate in order to detect the state of occupying, (perhaps uniformly) carries out the processing that electric power that mandatory reduction carries out to load is supplied with (perhaps temporarily stopping) as required.The electric power (comprising situation about temporarily stopping) that throttling is supplied with to load; Then the load condition of this load is alleviated from directly perceived going up; Detect the signal of load-modulate easily in the power transmitting device side, thereby, also can foreign matter be detected accuracy and maintain higher level even under the heavier situation of load.In addition, even under the situation of mandatory reduction load, supplying with at least all the time in the load has required minimal electric power, and the problem that the electronic circuit of load-side is failure to actuate can not take place.And; As stated, intermittence is used to make foreign matter to insert detection becomes possible load-modulate, and considers to the electric power that carries out to load and supply with the influence that brings; Carry out this load-modulate with proper spacing; Can not alleviate load, bring special harmful effect (for example, can not produce the disadvantage that charging interval of battery pack becomes very long) and give to the load transferring electric power because of mandatory.As stated; State in current-collecting device side monitoring load; Occupy status detection (insertion of larger area foreign matter) when becoming possible load-modulate being used to make; The executed in parallel load alleviate processing, thereby even under the heavier situation of load, also can the detection accuracy of the load variations of power transmitting device side be remained on the level of expectation.
(20) in the electronic equipment of the present invention above-mentioned power transmitting device is installed.
Thus, can provide low in energy consumption, and the electronic equipment with high security and reliability.
Thus, at least one execution mode of the present invention, can provide a kind of user's ease of use high and can suppress the contactless power transmission technology of power consumption.And, at least one execution mode of the present invention, a kind of contactless power transmission technology of having implemented the high reliability of perfectly sound Security Countermeasures can be provided.And, at least one execution mode of the present invention, can reduce number of components, realize miniaturization and cost degradation.
(21) in a mode of power transmission control method of the present invention, be a kind of power transmission control method, be used to control from the transmission of electricity of power transmitting device to current-collecting device; Above-mentioned power transmitting device carries out the intermittence transmission of electricity; The above-mentioned current-collecting device that receives above-mentioned intermittent transmission of electricity is replied, and above-mentioned power transmitting device is through detecting above-mentioned replying, and detection can receive the setting of the position of electricity through contactless electric power transfer for above-mentioned current-collecting device; When detecting above-mentioned the setting; Above-mentioned power transmitting device is transmitted electricity continuously, and when not detecting above-mentioned the setting, above-mentioned power transmitting device is intermittently transmitted electricity.
In the method for this mode, power transmitting device carries out the intermittence transmission of electricity.Having accepted the current-collecting device of intermittent transmission of electricity replys.Power transmitting device comes from replying of current-collecting device through detection, and the detection current-collecting device is arranged on the position of the hard to bear electricity of ability.When detecting being provided with of current-collecting device, beginning is transmission of electricity continuously, when not detecting when being provided with, is not beginning transmission of electricity continuously, but continues intermittently transmission of electricity.According to this method, the user only need be provided with and receive electric side apparatus (current-collecting device), need not to carry out switching manipulation etc., has improved user's ease of use more.And, can during intermittently transmitting electricity, suppress power consumption, realize economizing electrification.
Description of drawings
Fig. 1 (A), Fig. 1 (B) are used to explain the electronic equipment example of suitable contactless electric power transfer method and the key diagram that usability is answered transistorized contactless electric power transfer principle;
Fig. 2 is that expression comprises each several part in the non-contact power transmitting system of power transmitting device and current-collecting device specifically constitutes routine circuit diagram;
Fig. 3 (A), Fig. 3 (B) are the key diagrams that is used to that the transmission of electricity side apparatus is described and receives the message transmission principle between the electric side apparatus;
Fig. 4 is the flow chart that briefly shows the action example of a routine power transmitting device;
Fig. 5 is the circuit diagram of the formation example of expression one example transmission of electricity side control circuit;
Fig. 6 is the sketch map of the basic order example of expression non-contact power transmitting system;
Fig. 7 is the state transition diagram of state-transition of non-contact power transmitting system of the basic order of expression execution graph 6;
Fig. 8 is the flow chart of action example of non-contact power transmitting system of the basic order of expression one routine execution graph 6;
Fig. 9 is the flow chart of action example of non-contact power transmitting system of the basic order of expression one routine execution graph 6;
Figure 10 (A), Figure 10 (B) are the precedence diagrams that is full of a series of actions step that recharges management behind the electricity that expression is used for non-contact power transmitting system;
Figure 11 carries out the ID authentication automatically, normally transmits electricity, is full of electro-detection and recharges the flow chart of action step of non-contact power transmitting system of a series of actions of management;
Figure 12 is the key diagram that is used to explain the position probing principle;
Figure 13 (A)～Figure 13 (F) is used to explain that metallic foreign body (foreign conducting matter) detects the key diagram of principle;
Figure 14 (A)～Figure 14 (D) is used to explain the key diagram of removing the detection principle;
Figure 15 (A)～Figure 15 (B) is used to explain that the foreign matter after normal transmission of electricity begins inserts sectional view (occupying state), that constitute the electronic equipment of non-contact power transmitting system;
Figure 16 (A), Figure 16 (B) are used to explain in order to detect that foreign matter inserts and the key diagram of concrete mode during the intermittent load that changes the current-collecting device side;
Figure 17 is that the circuit diagram that inserts the relevant main composition of (occupying state) detection with foreign matter is selected in expression from non-contact power transmitting system shown in Figure 2;
Figure 18 (A), Figure 18 (B) are that explanation is used to make the foreign matter detection to become the key diagram of the best and concrete mode of possible load-modulate;
Figure 19 (A)～Figure 19 (E) is the key diagram that is used to explain the load reduction action.
Embodiment
Below, with reference to accompanying drawing preferred implementation of the present invention is described.In addition, the execution mode of explanation is not to be used for limiting irrelevantly the content of the present invention that claims are put down in writing below, and all formations of explaining in this execution mode are not necessary as solution of the present invention.
(first execution mode)
At first, the example of suitable preferred electron equipment of the present invention and the principle of contactless power transmission technology are described.
(principle of electronic equipment example and contactless electric power transfer)
Fig. 1 (A) and Fig. 1 (B) are used to explain electronic equipment example that is suitable for contactless electric power transfer method and the key diagram that utilizes the contactless electric power transfer principle of sensor transformer.
Shown in Fig. 1 (A), comprise power transmitting device (comprising the transmission of electricity module of transmission of electricity side control circuit (transmission of electricity side control IC) etc.) 10 as the charger (carriage) 500 of transmission of electricity side electronic equipment.And this charger (carriage) 500 is included in the display part of lighting when charger is normally transmitted electricity (LED etc.) 16.
Comprise current-collecting device (comprise receive electric side control circuit (receiving electric side control IC) receive electric module etc.) 40 as the pocket telephone that receives electric side apparatus 510.Operating portion 514, microphone 516 (sound input part), loud speaker 518 (audio output unit) and antenna 520 that this pocket telephone 510 comprises display parts 512 such as LCD, is made up of button etc.
In charger 500, through AC transducer 502 supply capabilities.This electric power is delivered to current-collecting device 40 through contactless electric power transfer from power transmitting device 10.Thus, can the storage battery of pocket telephone 510 be charged, perhaps make the equipment work in the pocket telephone 510.
As pattern among Fig. 1 (B) illustrate, be to realize from power transmitting device 10 to the electric power transfer of current-collecting device 40 through making primary coil L1 (transmission of electricity coil) that is arranged on power transmitting device 10 sides and secondary coil L2 (the receiving electric coil) electromagnetic coupled that is arranged on current-collecting device 40 sides form the electric power transfer transformer.Thus, can carry out electric power transfer through not contacting.
In addition, the electronic equipment of suitable this execution mode is not limited only to pocket telephone 510.For example, also can be applied to the various electronic equipments of wrist-watch, cordless telephone, shaver, electric toothbrush, palmtop PC (wrist-computer), portable terminal device, portable data assistance or electric bicycle etc.
As especially preferred electronic equipment, can enumerate portable terminal (comprising portable telephone terminal, PDA terminal, portable personal computer terminal) or clock and watch (watch) etc.Current-collecting device formation of the present invention is simple and volume is less; Therefore can be installed in portable terminal etc.; And because consumption is less, thus the charging interval of the secondary cell in the electronic equipment for example can be shortened, and; Reduce heating, thereby improved the reliability of considering from the safe face of electronic equipment.
Especially, the charging current amount of portable terminal (comprising portable telephone terminal, PDA terminal, portable personal computer terminal) when high capacity is bigger, also is easy to occur heating problem.Therefore, can be called as and effectively to utilize the low-loss that the present invention has and the equipment of low heat generation characteristic.
And; The power transmitting device 10 that is installed on the charger (carriage) 500 of Fig. 1 (A) is temporarily transmitted electricity with the interval intermittence of regulation;, detect automatically as the pocket telephone that receives electric side apparatus 510 settings (setting) and can receive on the position (zone) of electric power from receiving replying of temporary transient current-collecting device 40 of transmitting electricity through detection through contactless electric power transfer.If detect setting (setting), then begin normal transmission of electricity (successional normal transmission of electricity) automatically.Therefore, the user only needs on charger (carriage) 500, pocket telephone 510 to be set and gets final product, and does not need console switch etc. fully.Therefore, can realize user's the high and non-contact power transmitting system easy to use of ease of use.In addition, what is called will receive electric side apparatus setting (setting) on the position (zone) that can receive based on the electric power of contactless electric power transfer, for example comprise on cradle, placing as the situation that receives the portable terminal of electric side apparatus.And, under the situation of wall-hanging cradle, will hang up as the portable terminal that receives electric side apparatus is perpendicular, this also is equivalent to above-mentioned setting.
And power transmitting device 10 can be used to detect the transmission of electricity at intermittence that whether need recharge or be used to detect the intermittence transmission of electricity that is full of the removal behind the electricity after current-collecting device 40 receives the notice that is full of electricity, replaces normal transmission of electricity with this.Thereby, can be full of the management that recharges behind the electricity automatically.
(the formation example of power transmitting device and current-collecting device)
Fig. 2 is that expression comprises that the each several part in the non-contact power transmitting system of power transmitting device, current-collecting device specifically constitutes the circuit diagram of example.As shown in the figure, power transmitting device 10 comprises power transmission control device 20, transmission of electricity portion 12 and waveform monitor circuit 14.And power transmission control device 20 comprises transmission of electricity side control circuit 22, oscillating circuit 24, Drive and Control Circuit 26 and waveform detection circuit 28.
And, on current-collecting device 40, be provided with power receiving section 42, load-modulate portion 46, power supply control part 48 and receive controller for electric consumption 50.And load 90 comprises battery charge controller 92 and storage battery (secondary cell) 94.Specify below.The electronic equipment of transmission of electricity sides such as charger 500 comprises power transmitting device shown in Figure 2 10 at least.And pocket telephone 510 grades receive electric side electronic equipment to comprise current-collecting device 40 and load 90 at least.And; Through formation shown in Figure 2; Can realize contactless transmission of electricity (noncontact electric power transfer) system that is described below; Promptly, make primary coil L1 and secondary coil L2 electromagnetic coupled, from power transmitting device 10 to current-collecting device 40 transferring electric powers, from the voltage output node NB6 of current-collecting device 40 to load 90 supply capabilities (voltage VOUT).
Power transmitting device 10 (transmission of electricity module, simple module) can comprise primary coil L1, transmission of electricity portion 12, waveform monitor circuit 14, display part 16 and power transmission control device 20.In addition, power transmitting device 10 and power transmission control device 20 are not limited only to the formation of Fig. 2, a part (for example display part and waveform monitor circuit) of omitting its inscape can be arranged or increase other inscape or change various distortion such as annexation to implement.Transmission of electricity portion 12 generates the alternating voltage of assigned frequency when carrying out electric power transfer, when carrying out transfer of data, generate the alternating voltage of different frequency according to data, and supply with primary coil L1.
Fig. 3 (A) and Fig. 3 (B) are the key diagrams that is used to that an example transmission of electricity side apparatus is described and receives the message transmission principle between the electric side apparatus., simple side direction primary side utilizes frequency modulation(FM) when transmitting information.And, when simple side is transmitted information, utilize load-modulate from primary side.Shown in Fig. 3 (A), for example when from power transmitting device 10 when current-collecting device 40 sends data " 1 ", the alternating voltage of generated frequency f1, when sending data " 0 ", the alternating voltage of generated frequency f2.And shown in Fig. 3 (B), current-collecting device 40 can be changed between low load condition and high load condition through load-modulate, thereby, can " 0 ", " 1 " be sent to primary coil (power transmitting device 10).
Return Fig. 2 and continue explanation.The transmission of electricity portion 12 of Fig. 2 can comprise the first transmission of electricity driver that is used to drive primary coil L1 one end, be used to drive the second transmission of electricity driver of the primary coil L1 other end and constitute at least one capacitor of resonant circuit jointly with primary coil L1.And the first transmission of electricity driver that transmission of electricity portion 12 comprises, each the transmission of electricity driver in the second transmission of electricity driver all are the phase inverters (perhaps buffer circuit) that for example is made up of power MOS transistor, by Drive and Control Circuit 26 controls of power transmission control device 20.
Primary coil L1 (transmission of electricity lateral coil) forms electric power transfer with secondary coil L2 (receiving electric lateral coil) electromagnetic coupled and uses transformer.For example, as shown in Figure 1 when the needs electric power transfer, on charger 500, place pocket telephone 510, the magnetic flux that becomes primary coil L1 passes the state of secondary coil L2.On the other hand, when not needing electric power transfer, with pocket telephone 510 and charger 500 physical separation, the magnetic flux that becomes primary coil L1 does not pass the state of secondary coil L2.
Waveform monitor circuit 14 is the circuit that are used for the induced voltage of detection of primary coil L1, comprise for example resistance R A1, RA2 and be arranged on RA1 and the connected node NA3 of RA2 and GND (broadly being the low potential side power supply) between diode DA1.Specifically, with resistance R A1, RA2 the induced voltage of primary coil is carried out the waveform detection circuit 28 that signal PHIN that dividing potential drop obtains is imported into power transmission control device 20.
Display part 16 is to utilize color, image etc. to show the device of the various states (in the transmission of electricity, ID authentication etc.) of non-contact power transmitting systems, for example, can realize through LED (light-emitting diode) or LCD (liquid crystal indicator) etc.
Power transmission control device 20 is the devices that are used to carry out the various controls of power transmitting device 10, can pass through IC apparatus realizations such as (IC).This power transmission control device 20 can comprise transmission of electricity side control circuit 22, oscillating circuit 24, Drive and Control Circuit 26 and waveform detection circuit 28.
And transmission of electricity side control circuit 22 is the circuit that are used to carry out the control of power transmitting device 10 and power transmission control device 20, for example can be through realizations such as gate array or microcomputers.
Specifically, transmission of electricity side control circuit 22 carries out needed various SECO and judgment processing such as electric power transfer, load detecting, frequency modulation(FM), foreign matter detection or loading and unloading detection.As stated, transmission of electricity side control circuit 22 is an opportunity with the conducting of switch (SW), to current-collecting device 40 starting positions detect with or the ID authentication with temporarily transmit electricity (afterwards stating).
Oscillating circuit 24 for example is made up of crystal oscillating circuit, is used to generate the clock signal of primary side.Drive and Control Circuit 26 is according to the clock signal that generates in the oscillating circuit 24 or from the frequency setting signal of control circuit 22; Generate the control signal of expected frequency; And to the output of the transmission of electricity driver (not shown) of transmission of electricity portion 12, thereby control the work of above-mentioned transmission of electricity driver.
28 pairs of waveform detection circuit are equivalent to the waveform of signal PHIN of the induced voltage of primary coil L1 one end to be monitored, and carries out load detecting, foreign matter detection etc.For example, if the load-modulate portion 46 of current-collecting device 40 is used for sending to power transmitting device 10 load-modulate of data, then the signal waveform of the induced voltage of primary coil L1 also changes with this load-modulate accordingly.
Specifically, for example shown in Fig. 3 (B), if in order to send data " 0 "; The load-modulate portion 46 of current-collecting device 40 reduces load; Then the amplitude of signal waveform (crest voltage) diminishes, if improve load in order to send data " 1 ", it is big that the amplitude of signal waveform becomes.Thereby whether the peak value of the signal waveform of waveform detection circuit 28 through carrying out induced voltage keeps handling waiting judges crest voltage above threshold voltage, thereby can judge that the data from current-collecting device 40 are " 0 " or " 1 ".In addition, the waveforms detection method is not limited to said method.For example, also can uprise or step-down by the load of electric side according to the judgement of the physical quantity beyond the peak value.
Current-collecting device 40 (receiving electric module, secondary module) can comprise secondary coil L2, power receiving section 42, load-modulate portion 46, power supply control part 48 and receive controller for electric consumption 50.In addition, current-collecting device 40 or receive controller for electric consumption 50 to be not limited in formation shown in Figure 2 can have a part of omitting its inscape or increase other inscapes or various modes of texturing such as change annexation.
Power receiving section 42 converts the ac induction voltage of secondary coil L2 into direct voltage.This conversion is to carry out through the rectification circuit 43 that power receiving section 42 comprises.This rectification circuit 43 comprises diode DB1～DB4.Diode DB1 is arranged between the generation node NB3 of node NB1 and direct voltage VDC of an end of secondary coil L2; DB2 is arranged between the node NB2 of the other end of node NB3 and secondary coil L2; DB3 is arranged between the node NB4 of node NB2 and VSS, and DB4 is arranged between node NB4 and the NB1.
The resistance R B1 of power receiving section 42, RB2 are arranged between node NB1 and the NB4.And, will input to the frequency detection circuit 60 that receives controller for electric consumption 50 through utilizing resistance R B1, RB2 that the voltage between node NB1, NB4 is carried out dividing potential drop gained signal CCMPI.
The capacitor CB1 of power receiving section 42 and resistance R B4, RB5 are set between the node NB4 of node NB3 and VSS of direct voltage VDC.And, will input to via holding wire LP2 and receive electric side control circuit 52 and position detecting circuit 56 through utilizing resistance R B4, RB5 that the voltage between node NB3, NB4 is carried out branch pressure voltage VD4 that dividing potential drop obtained.About position detecting circuit 56, this branch pressure voltage VD4 is the signal input (ADIN) that is used for position probing.
Load-modulate portion 46 carries out load-modulate and handles.Specifically, from current-collecting device 40 when power transmitting device 10 sends desired data, according to sending data, the load in the load-modulate portion 46 (primary side) is changed changeably, the signal waveform of the induced voltage of primary coil L1 is changed.Therefore, load-modulate portion 46 comprises series connection and is arranged on resistance R B3, the transistor T B3 (the CMOS transistor of N type) between node NB3, NB4.
Through from receiving the signal P3Q that sent via holding wire LP3 by electric side control circuit 52 of controller for electric consumption 50, this transistor T B3 is carried out conduction and cut-off control.And; Authentication phase before the normal transmission of electricity of beginning; Thereby at conduction and cut-off oxide-semiconductor control transistors TB3 and carry out load-modulate when power transmitting device sends signal, the transistor T B2 of power supply control part 48 is ended, and load 90 is in the state that is not electrically connected with current-collecting device 40.
For example, when in order to send data " 0 " primary side being set at low load (impedance is big), signal P3Q is the L level, and transistor T B3 ends.Thereby the load of load-modulate portion 46 becomes almost infinitely great (non-loaded).On the other hand, when in order to send data " 1 " primary side being set at high capacity (impedance is little), signal P3Q becomes the H level, transistor T B3 conducting.Thus, the load of load-modulate portion 46 becomes resistance R B3 (high capacity).
48 controls of power supply control part are supplied with to the electric power of load 90.Adjuster (LDO) 49 is adjusted the voltage level of the direct voltage VDC that obtains through the conversion in rectification circuit 43, generates supply voltage VD5 (for example 5V).Receive controller for electric consumption 50 for example to be provided this supply voltage VD5 and carry out work.
And, the switching circuit that is made up of PMOS transistor (M1) is set between the input of adjuster (LDO) 49 and output.Through the PMOS transistor (M1) of conducting, form path with adjuster (LDO) 49 bypasses as switching circuit.For example, (for example, initial when high capacity in the charging that consumes rapid secondary cell; Need stably the to flow big electric current of constant is when this state is equivalent to high capacity) because the equiva lent impedance of adjuster 49 itself; Power consumption increases, and heating also increases, therefore; Walk around adjuster, via bypass path, with the electric current supply load.
For control conduction and cut-off, be provided with as the PMOS transistor (M1) of switching circuit the nmos pass transistor (M2) that plays a role as the Bypass Control circuit and on draw (pull-up) resistance R 8.
The control signal of high level is supplied to the grid of nmos pass transistor (M2) through holding wire LP4 from receiving electric side control circuit 52, nmos pass transistor (M2) conducting.Like this, the grid of PMOS transistor (M1) becomes low level, PMOS transistor (M1) conducting, the path of formation bypass adjuster (LDO) 49.On the other hand, be under the situation of cut-off state at nmos pass transistor (M2), the grid of PMOS transistor (M1) maintains high level through pull-up resistor R8, and therefore, PMOS transistor (M1) ends, and does not form bypass path.
The conduction and cut-off of nmos pass transistor (M2) is controlled by the electric side control circuit 52 that receives that comprised by controller for electric consumption 50.
And; Transistor T B2 (P type CMOS transistor) is arranged between the generation node NB5 (output node of adjuster 49) and node NB6 (the voltage output node of current-collecting device 40) of supply voltage VD5, by controlling from the signal P1Q that receives electric side control circuit 52 that receives controller for electric consumption 50.Specifically, transistor T B2 is a conducting state when finishing (establishment) ID authentication and carry out normal electric power transfer (that is normal transmission of electricity).
In addition, between supply voltage generates the node NB8 of grid of node NB5 and transistor T B2, pull-up resistor RU2 is set.
Receiving controller for electric consumption 50 is the devices that carry out the various controls of current-collecting device 40, waits through IC apparatus (IC) and realizes.This supply voltage VD5 that can generate through the induced voltage based on secondary coil L2 by controller for electric consumption 50 carries out work.And, receive controller for electric consumption 50 can comprise control circuit 52 (receiving electric side), position detecting circuit 56, oscillating circuit 58, frequency detection circuit 60, be full of power detection circuit 62 and recharge supervisory circuit 64.
Receive electric side control circuit 52 to be used to control current-collecting device 40 or receive controller for electric consumption 50, for example can be through realizations such as grid array or microcomputers.This receives electric side control circuit 52 that the constant voltage (VD5) of the output of series regulator (LDO) 49 is carried out work as power supply.This supply voltage (VD5) is supplied to via power supply supply line LP1 and receives electric side control circuit 52.
Specifically, above-mentionedly receive electric side control circuit 52 to carry out ID authentication, position probing, frequency detecting, be full of electro-detection, recharge and whether to judge, be used for authentication and use the load-modulate of communication, insert required various SECO or the judgment processing such as load-modulate that detect the communication of carrying out for realizing foreign matter.
Position detecting circuit 56 is monitored the waveform of the signal ADIN of the induction voltage waveform that is equivalent to secondary coil L2, and judges whether the position relation of primary coil L1 and secondary coil L2 is suitable.
Specifically, convert signal ADIN into binary system (binaryvalue), thereby judge whether its position relation is appropriate through comparator.
Oscillating circuit 58 for example is made up of the CR oscillating circuit, is used to generate the clock signal (clock) of primary side.The frequency of frequency detection circuit 60 detection signal CCMPI (f1, f2), and judge that the transmission data of being sent by power transmitting device 10 are " 1 " or " 0 ".
Be full of power detection circuit 62 (charging testing circuit) and be the storage battery 94 that is used to detect load 90 and whether become the circuit that is full of electricity condition (charged state).Specifically, be full of power detection circuit 62 for example is used to represent the LEDR of charged state through detection conduction and cut-off, be full of electricity condition thereby detect.That is,, judge that storage battery 94 is in and be full of electricity condition (complete charge) when LEDR (for example 5 seconds) when extinguishing continuously at the appointed time.
And load 90 comprises the battery charge controller 92 of charging control of carrying out storage battery 94 etc.This battery charge controller 92 can detect according to the illuminating state of light-emitting device (LEDR) and be full of electricity condition.This battery charge controller 92 (charging control IC) can be realized through IC apparatus.In addition, can make storage battery 94 itself have the function of battery charge controller 92.In addition, load 90 is not limited to secondary cell.For example, also have and move, thereby this circuit becomes the situation of load through allocated circuit.
And, if after being full of electricity, be placed on for a long time on the carriage 500 by electric side apparatus 510, then owing to discharge, the voltage of battery tension VBAT can reduce.Recharge monitoring circuit 64 and judge whether that according to battery tension VBAT needs recharge.That is, for example battery tension VBAT then recharges monitoring circuit 64 and is judged as and need recharges less than threshold voltage.
(the action summary of power transmitting device)
Fig. 4 is the flow chart of the action summary of expression one routine power transmitting device.As stated, the transmission of electricity side control circuit of power transmitting device 10 of the present invention 22 detects automatically and receives the setting of electric side apparatus 510, and also can be full of the management that recharges behind the electricity.The pattern that such power transmitting device 10 is automatically performed a series of actions is called automatic mode.
As shown in the part that dotted line surrounded thicker among Fig. 4, the action of the power transmitting device 10 of automatic mode roughly is divided into " be provided with detect and confirm transmission of electricity object (step SA) ", " affirmation (step SB) of the transmission of electricity environment in the normal transmission of electricity " and " being full of electro-detection (step SC) ", " is full of the supervision (step SD) behind the electricity.Describe successively below.
Energized (step S0) then is provided with and detects and transmission of electricity object affirmation (step SA).Comprise step S1～step S4 among this step SA.Through step S1 and step S2, power transmitting device 10 automatically and intermittently drive primary coil L1, and carries out intermittent temporary transient transmission of electricity in the specified period (for example, 0.3 second).Then, whether suitably that confirms to receive electric side apparatus 510 is provided with position (step S3), carries out and receives the ID authentication of electric side apparatus 510 (perhaps current-collecting device 40), and judge whether it is suitable transmission of electricity object (step S4).
During the detection position of current-collecting device 40 successful (step S3), at the appointed time, send the ID authentication informations to power transmitting device 10.The ID authentication information whether power transmitting device 10 receives from current-collecting device according to the time from the temporary transient transmission of electricity of intermittence at the appointed time detects the setting that receives electric side apparatus 510.When not detecting when receiving being provided with of electric side apparatus 510, during perhaps ID authentication (step S4) failure (step S5), stop temporary transient transmission of electricity, return the state (initial condition) of intermittently temporarily transmitting electricity.
Above-mentioned position probing (step S3) is to judge according to for example carrying out the direct voltage (ADIN) that rectification obtains by the induced voltage of the 56 pairs of secondary coils of position detecting circuit (L2) in the current-collecting device of Fig. 2 40.Figure 12 is the key diagram that is used to explain the position probing principle.Shown in figure 12, the voltage level of ADIN changes according to the position relation of primary coil (L1) and secondary coil (L2).
For example; What receive electric side apparatus was provided with the position not at that time; Based on the direct voltage (ADIN) that can't obtain specified level (V3 level), thereby it is improper to be judged as the position, and this position probing result for example can be transferred to power transmitting device 10 from current-collecting device 40 through load-modulate.And, also can not send the ID authentication information in the stipulated time after receiving temporary transient transmission of electricity, thereby transmission location is improper through current-collecting device 40 to power transmitting device 10.
Return Fig. 4 and continue explanation.In Fig. 4, if ID authentication (step S4) success then begins normal transmission of electricity (step S6).In normal transmission of electricity process, in power transmitting device 10, carry out metallic foreign body and detect (step S7) and occupy (takeover) status detection (step S8, S9) based on what regular load change detected.And, also receive the removal (leave) of electric side apparatus 510 to detect (step S10).When detecting metallic foreign body, when occupying any one situation in state and the removal (step S11), stopping normal transmission of electricity (step S12), return step S1 (carrying out the step of automatic intermittent action).
Can carry out metallic foreign body according to the wave form varies of the induced voltage signal of primary coil (L1) detects (step S7) and removes detection (step S10).Below, specify.
Figure 13 (A)～Figure 13 (F) is used to explain that metallic foreign body (foreign conducting matter) detects the key diagram of principle.Figure 13 (B)～Figure 13 (F) is respectively according to the relative position between primary coil and metallic foreign body (foreign conducting matter) MET, shows the sketch map how induced voltage signal (V (NA2)) of the primary coil L1 shown in Figure 13 (A) changes.As shown in the figure, the waveform (amplitude) of the V (NA2) in (Figure 13 (B)～Figure 13 (E)) is obviously different under (Figure 13 (F)) and the state that has metallic foreign body (MET) to exist under the state that does not have metallic foreign body (MET) fully.Therefore, the waveform of the induced voltage signal V (NA2) through waveform monitor circuit 14 (with reference to Fig. 2) monitoring primary coil (L1) can detect metallic foreign body (MET).In addition, " monitoring waveform " also comprises the for example situation of the phase place of monitor current and voltage except the situation of monitoring amplitude.
Figure 14 (A)～Figure 14 (D) is used to explain the key diagram of removing the principle that detects.Shown in Figure 14 (A), to place when receiving electric side apparatus 510, the waveform of the induced voltage signal V (NA2) of primary coil (L1) becomes state shown in Figure 14 (B).On the other hand, shown in Figure 14 (C), when be removed by electric side apparatus 510 (when leaving), the waveform of the induced voltage signal V (NA2) of primary coil (L1) becomes state shown in Figure 14 (D), and clearly, its waveform (amplitude) is different with the waveform of Figure 14 (B).Therefore, can monitor the waveform of the induced voltage signal V (NA2) of primary coil (L1), remove (leaving) thereby detect through waveform monitor circuit 14 (with reference to Fig. 2).
In addition, can occupy status detection (the step S9 of Fig. 4) (about this point, explanation in the back) according to whether can detect intermittence (for example, the periodicity) load modulation signal that receives electric side in the transmission of electricity side.
Return Fig. 4 and continue explanation.In Fig. 4; The transmission of electricity side control circuit 22 of power transmitting device 10 detects the expression storage battery that sends from current-collecting device 40 and is full of electric notify (the step S13) of being full of of electricity; Then by the monitoring step (step SD) of normally transmitting electricity (step S14), forwarding to as required after being full of electricity.
In addition, be full of the electricity condition that is full of that power detection circuit 62 detects storage batterys 94 by what the current-collecting device 40 of Fig. 2 comprised.Be full of electricity if detect, the electric side control circuit 52 that receives that then comprises in the current-collecting device 40 is full of the electricity notice to power transmitting device 10 transmissions.The transmission of electricity side control circuit 22 of power transmitting device 10 detects the electricity notice of being full of from current-collecting device 40, then as stated, is full of the monitoring step (step SD) behind the electricity.
The monitoring step (step SD) that is full of behind the electricity comprising: carry out the step (step S15) that the removal that is full of behind the electricity detects intermittence transmission of electricity usefulness, cycle T 10; Remove and detect step (step S16); Execution recharges the step (step S17) that need whether detect intermittence transmission of electricity usefulness, cycle T 20; And recharge and require to detect step (step S18).Thereby, can, the load that receives electric side apparatus 510 (storage battery) 94 further monitor load condition after being full of electricity, and restarting of recharging automatically.
That is to say, after being full of electricity, still kept when being placed state by electric side apparatus 510, as time goes by, load (storage battery) 94 discharges become the state that need recharge.Therefore, detect be full of electricity after, carry out suitably intermittent periodically transmission of electricity, replacing normal transmission of electricity, and judge whether automatically to recharge load, recharge if desired, then begin normal transmission of electricity (step S6) once more.Thus, carry out recharging of load (storage battery) 94 automatically.Thereby, even receive electric side apparatus 510 after being full of electricity still by under the situation of long-time placement, use when receiving electric side apparatus 510 the user, load (storage battery) 94 still can maintain the state that is full of electricity all the time.Therefore, electricity can not take place specially to have filled, but because discharge afterwards, the result becomes does not have the fully thing of the state of charging, thereby can not run counter to user's expectation.
But, after being full of electricity, when be removed by electric side apparatus, need not to recharge management.Therefore, and recharge management, be used to be full of the transmission of electricity at intermittence that the removal behind the electricity detects with intermittently transmission of electricity (step S15) is different.If not from accepted to remove detect with transmission of electricity intermittently receive replying of electric side apparatus 510, then can judge be removed by electric side apparatus 510.Be removed if detect, the transmission of electricity side control circuit 22 that then comprises in the power transmitting device 10 restPoses (intermittently temporary transient transmission of electricity state).And, need not too frequently to remove to detect and transmit electricity the intermittence that recharges, and preferably carry out, so that can not increase power consumption meaninglessly with the suitable cycle with intermittently transmitting electricity and being used to manage.Therefore, remove the transmission of electricity at intermittence that detects usefulness with period 1 T10, T20 is used to manage the transmission of electricity at intermittence that recharges with second round.
With period 1 T10 and second round T20 to distinguish be will optimize in the cycle according to purpose separately because need.But, period 1 T10 with second round T20 also can be identical.In addition, can the meaning of above-mentioned " being full of " for example be interpreted broadly into " load condition of current-collecting device 40 sides is specified states ".Therefore, load is not limited to storage battery.For example, receive the allocated circuit of electric side apparatus 510 also can become load.That is, for example " allocated circuit is accepted from the transmission of electricity of power transmitting device and is begun to become the state that this allocated circuit need not to move after the action " this be equivalent to " load becomes the situation that is full of electricity ", this situation is also included within the technical scope of this mode.
And; Receive the importance of the setting of electric side apparatus 510 from fast detecting; Preferably the cycle (cycle of the automatic intermitten among the step S1 of Fig. 4) with the temporary transient transmission of electricity of intermittence is set at the very short cycle (for example, 0.3 second cycle), thereby carries out the temporary transient transmission of electricity of intermittence.On the contrary, be full of long what problem that also do not have of cycle of the temporary transient transmission of electricity of period ratio that the removal behind the electricity detects, and, if frequently remove detection, then increase unnecessary power consumption.Therefore, will be full of the period 1 T10 that the removal behind the electricity detects and set the cycle (for example, 5 second cycle) longer for, thereby suppress the increase of power consumption than the temporary transient transmission of electricity cycle.And; Being full of frequency that whether recharging behind the electricity need detect can also be littler (storage battery that is full of electricity is discharged till the back recharges to needs, can spend long time, and; Need whether judgement postpone even recharge; On practice, can not have problems yet), therefore, T20 second round that will be used to be full of electro-detection sets for than period 1 T10 longer (for example being set at 10 minutes cycle).Thus, can be carrying out the intermittence transmission of electricity corresponding to cycle of purpose separately, thus can be with power consumption control in Min..
(example of the formation of transmission of electricity side control circuit)
Fig. 5 is the circuit diagram that expression one example transmission of electricity side control circuit constitutes.As shown in the figure, transmission of electricity side control circuit 22 comprises logical circuit 100.Logical circuit 100 comprises position detection part 106, ID authentication department 108, remove test section 110, foreign matter test section 112 (comprising the state-detection portion 114 that occupies), be full of electricity notice (transmission of electricity stops requirement) test section 116, recharge the transmission of electricity control part 118 that requires test section 117, is used for the timer 119 of administrative time and controls the conduction and cut-off of transmission of electricity (temporary transient transmission of electricity with normally transmit electricity) based on the testing result of each several part.Transmission of electricity control part 118 comprises the control part 121 of transmitting electricity the intermittence that is full of behind the electricity.
(the basic sequential example of the non-contact power transmitting system of automatic mode)
Fig. 6 is the routine sketch map of basic sequential of the non-contact power transmitting system of expression automatic mode.The user will for example be arranged on the assigned position of cradle 500 by electric side apparatus 510.As stated, power transmitting device 10 carries out intermitten automatically, often carries out the temporary transient transmission of electricity of intermittence (step S19, S20).Detect the position that receives electric side apparatus 510 (step S21) of accepting temporary transient transmission of electricity,, then stop temporary transient transmission of electricity (step S22) if the position is improper.
If receive the location-appropriate that is provided with of electric side apparatus 510, then carry out ID authentication (step S23).That is, ID authentication information (manufacturer's information, device id number, rated value information etc.) is sent to power transmitting device 10 from current-collecting device 40.
If the ID authentication success, then 10 pairs of current-collecting devices of power transmitting device, the 40 normal transmission of electricity of beginning (step S26).During normal transmission of electricity; As stated; The regular load authentication of removing detection (step S29), metallic foreign body detection (step S30), primary side (comprises the processing of carrying out as required that alleviates the primary side load; Step S31) and occupy state-detection (step S32), when detecting wherein any one, stop normal transmission of electricity (step S33).In addition; Follow the load reduction of the regular load authentication of primary side to be meant the processing that is described below: promptly, in load (storage battery etc.) even carry out load-modulate under the heavier state; Also exist in the situation that simple side can't receive modulation signal well, therefore when carrying out load-modulate, dwindle the power supply (it is stopped) of confession load; From the load condition (, describing with reference to Figure 19 in the back) of mandatory reduction load directly perceived about this point.
In Fig. 6, if detecting, current-collecting device 40 recharges, then process and be full of electricity notice (preserve frame: transmission of electricity stops the requirement frame), and send (step S34) to power transmitting device 10.Power transmitting device 10 is detecting (step S35) when being full of electricity notice (transmission of electricity stops the requirement frame), by normal transmission of electricity (step S36), is full of the intermittence transmission of electricity (step S37) behind the electricity.Carry out intermittence and recharge whether to judge (step S38), recharge if desired, then begin normal transmission of electricity (step S26) once more.And the removal that receives electric side apparatus 510 that is full of behind the electricity detects (step S39), be removed by electric side apparatus 510 if detect, and then gets back to initial condition.
Fig. 7 is the state-transition sketch map that the non-contact power transmitting system of sequential shown in Figure 6 is carried out in expression.As shown in the figure, the state of system roughly is divided into initial condition (inactive state: ST1), position probing state (ST2), ID authentication state (ST3), transmission of electricity (normal transmission of electricity) state (ST4), regular load authentication state (ST5) (and load reduction state ST6) and be full of the state (ST7) of intermittently behind the electricity transmitting electricity.
Through based on automatic intermitten receive electric side apparatus detection (Q1) is set, change ST2 into from ST1, if position probing is NG, then return ST1 (Q2).If position probing is OK, then change ST3 into.If the ID authentication is OK (Q6), then change normal transmission of electricity state (ST4) into.
In normal transmission of electricity state ST4, remove detection (Q12), metal detection (Q10), occupy state-detection (Q17) and be full of electro-detection (Q14).If detect among Q10, Q12, the Q17 any one, (Q9, Q11, Q13) then restPoses.And, detect and be full of electricity (Q14), then transfer to the state ST7 (Q15) that intermittently transmits electricity.In the state ST7 that intermittently transmits electricity, recharge and whether to detect Q18 and remove detection Q16.If detect removal, then return initial condition (Q20).And, when needs recharge, begin normal transmission of electricity (Q19) once more.
The non-contact power transmitting system of the basic sequential of execution graph 6 and Fig. 7 can automatically detect the setting that receives electric side apparatus as the transmission of electricity object.Therefore, do not need the work and the time of user operable switch etc. fully, can realize non-contact power transmitting system easy to use.And,, can not improve reliability and fail safe to unsuitable equipment transmission of electricity through with the condition of ID authentication as normal transmission of electricity.And, in the process of normally transmitting electricity, carry out various detections action (remove detect, metallic foreign body detects, occupying state-detection and being full of electro-detection based on the regular load authentication of primary side); When detecting wherein any one, normal transmission of electricity is stopped rapidly, and returns initial condition; Therefore; Unnecessary transmission of electricity can not take place, foreign matter has also been implemented perfectly sound countermeasure, thereby can realize having the system of high reliability (fail safe).And; Be full of electricity (broadly being the situation that load becomes specified states) if detect; Then through execution be used to monitor be full of the load condition behind the electricity the transmission of electricity at intermittence (specifically; For example be to remove the transmission of electricity at intermittence that detects usefulness and recharge the transmission of electricity at intermittence that need whether judge usefulness), thus even after being full of electricity, also can proceed to be used for receiving electric side apparatus to remain on the action of optimum state.Thereby, further improve user's satisfaction.
Fig. 8 and Fig. 9 are the flow charts of action example of non-contact power transmitting system of the basic sequential of execution graph 6.In Fig. 8 and Fig. 9, the left side shows the workflow of transmission of electricity side (simple side), and the right side shows the motion flow that receives electric side (primary side).
As shown in Figure 8, transmission of electricity side control circuit 22 carries out automatic intermitten (step S40).Promptly, at interval, begin temporary transient transmission of electricity (for example, transmission frequency is f1, step S41) from the transmission of electricity side with official hour, and by timer pick up counting (step S42).
Receiving electric side,, then be transferred to power connection state (step S61), the judgement (position probing) of the line position level of going forward side by side from halted state (step S60) if accepted temporary transient transmission of electricity.If the position level is NG, then return initial condition (step S60), if OK then generates ID authentication frame (step S63) and sends ID authentication frame (step S64).
In the transmission of electricity side, carry out the reception of ID authentication frame and handle (step S44) and overtime judgement (step S43), do not receive under the situation of ID authentication frame at the appointed time, stop temporary transient transmission of electricity (step S51), and return initial condition.
On the other hand, can receive at the appointed time under the situation of ID authentication frame, carry out frame authentication processing (step S45); If authentication OK is then to receiving electric side to send permission frame (step S47), when authentication is NG; Then stop temporary transient transmission of electricity (step S51), return initial condition.
Current-collecting device 40 checkings are sent start frame (step S66) from the permission frame (step S65) of power transmitting device 10 to power transmitting device 10.
In power transmitting device 10, verify start frame (step S48), the detection (step S49) of the regular load-modulate of conducting (occupying state-detection uses), and the normal transmission of electricity of beginning (step S50).In current-collecting device 40, accept normal transmission of electricity, and begin load (for example storage battery) charge (step S67).
Then, with reference to the flow process after Fig. 9 explanation.Remove at power transmitting device 10, metallic foreign body, occupy in the detection separately (step S70) of state, wait for being full of electricity notice (transmission of electricity stops requirement) (step S71) from current-collecting device 40.
In current-collecting device 40, be used to occupy the regular load-modulate (step S80) of detection when load is charged, and detect load be full of electricity (step S81).That is, be full of power detection circuit 62 LED R extinguish the state continuance stipulated time more than (for example 5 seconds) and by the time, be judged as and be full of.Be full of electricity if detect, then current-collecting device 40 sends to power transmitting device 10 and is full of electric notification frame (preserving frame: stop transmission of electricity and require) (step S82).
In power transmitting device 10,, then detect (step S72), and stop transmission of electricity (step S73) by regular load-modulate if receive from the electric notification frame of being full of of current-collecting device 40 (preserve frame: transmission of electricity stops requirement).
(second execution mode)
In this execution mode, specify occupying status detection (occupying the heating countermeasure)." occupy state " and be confirmed as the special state that inserts foreign matter, be meant " foreign matter being thought by mistake the state that receives electric side apparatus and continue normal transmission of electricity ".For example, when metal sheet is inserted into to block state between primary coil and the secondary coil fully, look sideways, then become the situation of the load that has certain degree all the time, be difficult to for example remove detection from transmission of electricity.
(occupying the heating countermeasure)
At first, " occupying state " specified.Might there be following situation: after the authentication that finishes current-collecting device (perhaps receiving electric side apparatus) and beginning normal transmission of electricity, between primary coil L1 and secondary coil L2, be inserted with for example large-area foreign matter.As with reference to the explanation that Figure 13 carried out, can detect the existence of metallic foreign body through the induced voltage of monitoring primary coil (L1).
But, shown in Figure 15 (B), when the transmission of electricity side apparatus and receive to be inserted with between the electric side apparatus can block primary coil L1 and secondary coil L2 metallic foreign body (for example; Metal sheet) time; Transmission of electricity energy from simple side is consumed (that is to say that this metallic foreign body becomes load) by this metallic foreign body, therefore; See from power transmitting device 10, then be regarded as load (receiving electric side apparatus) and exist all the time.Therefore, even be removed by electric side apparatus, also have can't detect with reference to Figure 14 illustrated, based on the removal of the induced voltage of primary coil L1.At this moment,, still proceed transmission of electricity, thereby metallic foreign body arrives higher temperature from power transmitting device 10 though do not receive electric side apparatus.
Like this, in this manual, metallic foreign body is replaced the original phenomenon that receives electric side apparatus 510 be called " occupying ".For the fail safe and the reliability of non-contact power transmitting system are brought up on the actual usage level, also need implement sufficient countermeasure to above-mentioned " occupying heating ".As the situation that is inserted with foreign matter, it is contemplated that the situation that occurrent situation and malice are carried out.If be inserted with can occupy foreign matter, then owing to produce heating, can scald, equipment is impaired or the danger of the equipment of destruction, therefore, in non-contact power transmitting system, need to foreign matter insertion implement Security Countermeasures completely.Below, specify for occupying the heating countermeasure.
Figure 15 (A), Figure 15 (B) are used to explain that the foreign matter after the normal transmission of electricity of beginning inserts sectional view (occupying state), that constitute the electronic equipment of non-contact power transmitting system.
In Figure 15 (A); Portable telephone terminal 510 (electronic equipment that comprises current-collecting device 40) is set on the assigned position of carriage 500 (electronic equipment that comprises power transmitting device 10); Under this state; Via primary coil L1 and secondary coil L2, carry out contactless transmission of electricity from carriage (cradle) 500 to portable telephone terminal 510, the secondary cell (for example battery pack) 94 that is built in the portable telephone terminal 510 is charged.
In Figure 15 (B), following situation has been shown, when normally transmitting electricity, between carriage (cradle) 500 and portable telephone terminal 510, has inserted laminal metallic foreign body (foreign conducting matter) AR mala fide.If insert foreign matter AR, the major part of then supplying with the electric power of equipment (portable telephone terminal 510) of primary side from the equipment (carriage 500) of simple side is consumed (that is, occupying of transmission of electricity electric power being taken place) by foreign matter (AR), and the danger of foreign matter AR heating increases.Therefore, when the state that becomes shown in Figure 15 (B), need detect the insertion of foreign matter AR by the included power transmitting device 10 of equipment (carriage 500) of simple side, and stop normal transmission of electricity immediately.
But, in the detection method of the metallic foreign body illustrated, be difficult to hold fully the state of occupying shown in Figure 15 (B) with reference to Figure 13.
For example, when the load of current-collecting device side is big, increased,, then diminished by the amplitude of the voltage of primary coil L1 induction if the load of current-collecting device side diminishes by the amplitude of the voltage of primary coil L1 induction.If the secondary cell of portable telephone terminal 510 94 is charged normal, then as time goes by, the load of current-collecting device 40 sides should reduce gradually.At this moment, even the load of current-collecting device 40 sides increases suddenly,, increase rapidly so also can detect load because power transmitting device 10 is being monitored the load change of current-collecting device 40 sides.But the increase that can't judge this load is owing to load (secondary cell 94 of portable telephone terminal) produces, still owing to the offset between portable telephone terminal 510 and the carriage 500 produces, or owing to the insertion foreign matter produces.Therefore, power transmitting device 10 only depends on the method for the load change that detects current-collecting device 40 sides then can't detect the foreign matter insertion.
Therefore; In this execution mode, in the process of normal transmission of electricity, continue to load (secondary cell etc.) when transmitting electricity; Current-collecting device 40 intermittences and change (load-modulate work regularly) wittingly from power transmitting device 10 observed loads, and to power transmitting device 10 transmission information.
When power transmitting device 10 can regularly detect the information based on above-mentioned intermittent load variations with regulation, then prove following content.
(1) equipment of current-collecting device 40 sides (pocket telephone 510) correctly is arranged on the equipment (carriage 500) of power transmitting device 10 sides.
(2) equipment of current-collecting device 40 sides (secondary cell that comprises portable telephone terminal 510) is in operate as normal.
(3) do not insert foreign matter AR.
On the other hand, if when normal transmission of electricity, insert foreign matter AR, the information of sending from current-collecting device 40 receives the obstruction of this foreign matter AR, can't arrive power transmitting device 10.That is, in power transmitting device 10, can't detect the intermittent load variations (for example, regular load variations) of current-collecting device side.Confirming above-mentioned (1)～(3) afterwards, as the reason that can't detect intermittent load variations the most suspicious be above-mentioned (3).That is to say, can be judged as because be inserted with foreign matter, so can't detect intermittent load variations.
Figure 16 (A), Figure 16 (B) are used to explain the load that intermittently changes the current-collecting device side so that can detect the sketch map of the concrete mode of foreign matter insertion.
In Figure 16 (A), represent the situation that the intermittence of current-collecting device lateral load changes through the variation of secondary cell (flowing to the electric current of secondary coil L2).As shown in the figure, moment t1, t2, t3, t4, t5 ..., the load of current-collecting device side intermittently changes.
Specifically, in Figure 16 (A), load changes according to cycle T 3.And, for example with moment t1 be starting point during in the T2, load lightens, after during the T1 internal burden become heavy.In cycle T 3, repeat such cyclic variation.
Figure 16 (B) shows the variation of the primary coil voltage (induced voltage of primary coil one end) that changes with respect to the secondary load electric current.As stated, during in the T1 load of primary side become heavy, during the T2 internal burden lighten.Corresponding with the load variations of this primary side, the amplitude (peak value) of the induced voltage (primary coil voltage) of primary coil (L1) end also changes.That is, load heavy during in the T1 amplitude become big, load light during in the T2 amplitude diminish.Thereby, in power transmitting device 10, can for example carry out the peak value detection of primary coil voltage, thereby detect the load change of current-collecting device 40 sides through waveform detection circuit 28 (with reference to Fig. 2).But the detection method of load change is not limited to said method, for example also can the detection of primary coil voltage or the phase place of primary current etc.
Load-modulate for example can carry out simply through transistorized switch, and can use the basic circuit of analog or digital to carry out the crest voltage detection etc. of primary coil accurately, thereby the suffered burden of equipment is less, realizes easily.And, also help controlling erection space or reducing cost.
As stated; When normal transmission of electricity, current-collecting device 40 carries out sending based on the information of the load-modulate of intermittent (and periodically), and power transmitting device 10 detects the so new mode of this load change; Need not to increase special formation, just can detect foreign matter accurately and insert with simple method.
(foreign matter inserts the concrete example that detects)
Figure 17 be expression from non-contact power transmitting system shown in Figure 2, pick out insert the circuit diagram of the relevant main composition of the detection of (occupying state) with foreign matter.In Figure 17, the part identical with Fig. 2 indicates identical reference symbol.And, in Figure 17, be illustrated in the part that plays an important role in the insertion of detection foreign matter with thick line.
The circuit that should note in the current-collecting device 40 shown in Figure 17 constitute be constitute the load-modulate of load-modulate portion 46 (with reference to Fig. 2) with transistor T B3, constitute the power supply oxide-semiconductor control transistors TB2 of the control part 48 (with reference to Fig. 2) of supplying power and control two transistors (TB2, TB3) conduction and cut-off receive electric control circuit 52.And; The input of series regulator (LDO) 49 and the voltage of output are imported into via holding wire LP2 and LP1 and receive electric control circuit 52; Voltage through monitoring LDO49; Thereby can detect the load condition (weight of load) of the storage battery (secondary cell) 94 that comprises in the load 90, this point also is important.
And power transmission control device 20 is the formations in the power transmitting device 10 (with reference to Fig. 2).Promptly, the content that is described below is very important: the peak value (amplitude) of the induced voltage through waveform detection circuit 28 detection of primary coils (L1), in addition, detect the load change of current-collecting devices 40 sides through transmission of electricity control circuit 22.
In Figure 17; Current-collecting device 40 carries out load-modulate in normal transmission of electricity (the continuous transmission of electricity after the authentication) process, and sends the foreign matter detection to power transmitting device 10 and use pattern P T1, and the load variations of the transmission of electricity side control circuit 22 of power transmitting device 10 monitoring current-collecting device 40 sides in normal transmission of electricity process (can be a continuous monitoring; Also can be intermittent monitoring); In the time can't receiving this foreign matter check pattern (waveform) PT1, be judged as and be inserted with foreign matter AR, and stop normal transmission of electricity.
(foreign matter detects the concrete mode with pattern P T1)
Figure 18 (A), Figure 18 (B) are used to explain the key diagram that makes foreign matter detect the preferred and concrete mode that becomes possible load-modulate; Figure 18 (A) shows the timing example of load-modulate, and Figure 18 (B) has specifically illustrated the situation of the load change of the current-collecting device side that detects through power transmitting device.
Shown in Figure 18 (A), for example with cycle of 5 seconds (10sec), periodically (regularly) be used to foreign matter is detected become possible load-modulate.
And, constantly t1～t6 and t7～t12 constantly be used to that foreign matter is detected and become possible load-modulate during.T1 is 0.5 second (0.5sec) to t6 (t7 is to t12 constantly) constantly, and dividing 0.1 second (100msec) being obtained in 0.5 second with 5 grades is unit, comes the weight of transformed load.
In Figure 18 (A), with thicker four-headed arrow represent during load heavy during.That is, load on t1～t2 constantly, constantly t3～t4, constantly t5～t6, constantly t7～t8, constantly t9～t10, become heavy in constantly during each of t11～t12.During the load change weight is TA.
On the other hand, load on t2～t3 constantly, constantly t4～t5, constantly t8～t9, lighten in constantly during each of t10～t11.Load lighten during be TB.
In Figure 18 (A), clearly illustrate, the intermittence of the load of the current-collecting device side in normally transmitting electricity changes periodically (that is, each cycle), and in one-period, load intermittently repeatedly changes with the interval of regulation.
Through changing with making duty cycle property; Thereby power transmitting device 10 and current-collecting device 40 can guarantee synchronous in; Send or receive information (that is, can understand the timing of the load variations of current-collecting device 40 sides at an easy rate) in power transmitting device 10 sides based on load variations.
And, in Figure 18 (A), ((t1～t6), load is intermittently changed repeatedly constantly for example constantly during the part in the t1～t7) in one-period only with the interval of stipulating.That is to say, in the starting stage (initial 0.5sec) of the first half of one-period (10sec), concentrate and carry out load-modulate.Carry out the reasons are as follows of load-modulate of this form.
That is, therefore load variations (load-modulate) influence in the normal transmission of electricity, does not preferably carry out this load-modulate too continually to load (storage battery 94 of Figure 17) power supply.Therefore, for example prolong the one-period (like this,, detect on this point, also have no problem) of load-modulate to a certain extent at foreign matter even will set in the cycle longly slightly.
And, only during the part in one-period in, with predetermined distance load is intermittently changed repeatedly.In why being limited to during the part; Be because considered following situation, if promptly cross the interval of drawing back load variations greatly, then as time goes by; Perhaps load state changes; Condition perhaps changes, and is final, and the intermittent loads variation that power transmitting device is detected the current-collecting device side brings harmful effect.That is to say; For example; Set one-period to such an extent that grow (among Figure 18 (A) is 10sec), and the part in this long one-period short during concentrate the intermittent loads of carrying out repeatedly (being 5 times among Figure 18 (A)) to modulate in (0.5sec among Figure 18 (A)).
Through carrying out the load-modulate of aforesaid way, can will realize that the higher foreign matter (AR) of power transmitting device 10 sides detects accuracy when providing the influence of supplying with (for example, the charging of lithium battery) to the electric power of load (storage battery 94) to be controlled at minimum degree.
Figure 18 (B) be with, power transmitting device 10 corresponding from the load of the observed current-collecting device side of power transmitting device the sketch map of a routine amplitude variations of induced voltage of primary coil (L1) end.But; In Figure 18 (B), the load-modulate phase in the one-period of first half, (the load-modulate phase in the one-period of t1～t6) and latter half, (among the t7～t12), variation took place in the load condition of load (storage battery 94); In the cycle of latter half; It is heavy that the load condition of load (storage battery 94) becomes, thereby the peak value of primary coil voltage increases.
Moment t1～t6 in Figure 18 (B), load become heavy during primary coil voltage and load in the TA lighten during the difference of the interior primary coil voltage of TB be Δ V1.According to the difference of vibration Δ V1 of this primary coil voltage, the transmission of electricity side control circuit 22 of power transmitting device 10 can detect the load variations of current-collecting device 40 sides.
But; During the load-modulate of latter half (moment t7～t12); It is heavy that the load condition of load (storage battery 94) becomes, and the charging current of load 94 (Iload) increases, therefore; Ratio with respect to modulated current charging current (Iload), that follow load-modulate (Imod) diminishes, and the difference of the primary coil voltage that the conduction and cut-off of modulated current (Impd) causes is reduced into Δ V2 (Δ V2＜Δ V1).That is to say, become modulated current (Imod) and buried the state in the charging current (Iload) of load (storage battery 94).Thereby, can not deny, compare with the situation that load is light, when load (storage battery 94) is heavy, be difficult to detect the load variations of power transmitting device 10 sides more.So, at this execution mode, the power supply to load (storage battery 94) is provided, thereby alleviates the load condition of load (storage battery 94) through mandatory minimizing, make simple side be more prone to detect load variations based on load-modulate.Below, the measure that alleviates load is described.
(the mandatory measure that alleviates load)
In the present invention, not stop in order normally transmitting electricity load 94 transmissions of electricity and to carry out load-modulate, send signal based on this load-modulate to power transmitting device 10 sides and often receive the influence that brings (load condition of load promptly) to load 94 power supplies.
As stated; Irrefragablely be, when load 94 (battery pack etc.) provides big charging current, even for load-modulate the conduction and cut-off less current; The magnitude of current of the electric current of this conduction and cut-off (Imod) is still less than the magnitude of current of the charging current (Iload) of load (storage battery 94); Therefore, be difficult to detect situation (that is, being difficult to detect is the load variations that noise also is based on load-modulate) in power transmitting device 10 sides based on the load variations of load-modulate.On the other hand, the electric current of supplying with to load 94 is (when load is light) after a little while, increases based on the relative ratios of the conduction and cut-off electric current (Imod) of load-modulate, thereby can easily hold the load variations based on this conduction and cut-off from power transmitting device 10.
Based on above-mentioned considering; In this execution mode, when normally transmitting electricity, current-collecting device 40 self is monitored the load condition of load 94; When being used for to carry out the load-modulate of foreign matter detection; Under the situation of load 94 heavier (that is to say, supply with big electric current), take the measure of the electric power of mandatory reduction supply load 94 to load 94.In addition, so-called reduction transmission of electricity comprises the situation that temporary transient (or intermittent) stops to transmit electricity.
If dwindle the electric power that offers load 94; On then directly perceived, the load condition of load 94 alleviates, and detects the signal based on load-modulate easily in power transmitting device 10 sides; Even thereby under the heavier state of load 94, foreign matter detects the level that accuracy still maintains expectation.And even under the situation that forcibly alleviates load 94, in load 94, supplying with at least all the time has the electric power of required minimum, thereby the situation that the electronic circuit (battery charge controller 92) of load 94 sides can't move can not take place.
And; As stated, being used for carrying out foreign matter, to insert the load-modulate that detects be intermittently to carry out, and; Consider the influence that brings for to load 94 power supplies; Carry out load-modulate with proper spacing, even reduced load by the strong hand, for also not bringing special harmful effect to load 94 transferring electric powers.For example, the disadvantage that the charging interval that battery pack will never take place becomes extremely long.
As stated; State in current-collecting device 40 sides monitoring load 94; When being used for to carry out the load-modulate of foreign matter insertion detection, if desired, carry out the mandatory load condition that alleviates load 94 simultaneously; Even thereby when load 94 is heavier, also can the detection accuracy of the load variations of power transmitting device 10 sides be maintained the level of expectation.
Figure 19 (A)～Figure 19 (E) is the key diagram that is used to explain the load reduction action.Specifically; Figure 19 (A) is the sketch map of the light state of expression load; Figure 19 (B) is the sketch map of the heavier state of expression load; Figure 19 (C) is the sketch map of the variation situation of the primary coil voltage down of state shown in expression Figure 19 (B), and Figure 19 (D) is or conduction and cut-off power supply oxide-semiconductor control transistors or make it be in half conducting state and the view when alleviating load continuously that Figure 19 (E) is a sketch map of representing the variation situation of the primary coil voltage under the state shown in Figure 19 (D).
Under situation shown in Figure 19 (A); Load (storage battery) 94 is light (that is, the charging current Iload of load is less), therefore; Even do not alleviate the action of load in current-collecting device 40 sides, can fully detect load variations yet based on load-modulate in power transmitting device 10 sides.Therefore, power supply oxide-semiconductor control transistors TB2 is in conducting state all the time.Load-modulate transistor T B3 quilt is conduction and cut-off intermittently, thus, carries out load-modulate.
In Figure 19 (B), load (storage battery) 94 heavier (that is, the charging current Iload of load is bigger) therefore, is difficult to see that the electric current that the conduction and cut-off of modulated current (Imod) causes changes.Shown in Figure 19 (C), if load becomes heavier state from light state, then the amplitude variations amount of primary coil voltage narrows down to Δ V2 from Δ V1, is not easy to detect the load variations based on load-modulate.
Therefore, in Figure 19 (D), when carrying out load-modulate, alleviate the load action simultaneously.That is, in Figure 19 (D), carry out continuously conduction and cut-off power supply oxide-semiconductor control transistors TB2, or make it be in the action of half conducting state.
That is, through make the power supply oxide-semiconductor control transistors TB2 that is positioned among the supply path continuously conduction and cut-off, and carry out the digital method that electric power is supplied with off and on, the electric power of can mandatory throttling supplying with (comprising that temporarily stopping electric power supplying with) to load 94.Switching transistor is the action of often carrying out in the digital circuit continuously, is easy to realize.And,, can control the electric power that will offer load accurately and be reduced to how degree through the selector switch frequency.
And; Adopt analogy method; Intermediate voltage to the voltage of grid when supplying with complete conducting of power supply oxide-semiconductor control transistors (PMOS transistor) voltage when ending fully makes this PMOS transistor be for example so-called half conducting state, electric power that so also can throttling supply load 94.The advantage that has through the control gate pole tension conducting resistance that can inching power supply oxide-semiconductor control transistors (PMOS transistor).
In Figure 19 (E), through mandatory reduction load, the amplitude of the primary coil voltage under the heavier state of load becomes V20 from V10.In the drawings, the mandatory amount of alleviating of " X " expression load 94.Through forcibly alleviating load 94, the amplitude variations amount of primary coil voltage is extended to Δ V3 (Δ V3＞Δ V2) from Δ V2 (with reference to Figure 19 (C)), in power transmitting device 10, detects the load variations based on current-collecting device 40 sides of load-modulate easily.
As stated, through when carrying out load-modulate, carrying out load reduction action (comprising the action that temporarily stops load current), therefore, even when load is heavier, the power transmitting device side also can detect load variations reliably.
(the concrete action of power transmitting device)
Here, the concrete action to the power transmission control device 20 of Figure 17 describes.Like explanation that do the front; The regular load change test section 14 (with reference to Figure 15) of the transmission of electricity side control circuit 22 that comprises in the power transmission control device 20 is under the situation of normal transmission of electricity; When the intermittence of the load that can't detect current-collecting device 40 sides changes; Judgement is inserted with foreign matter (AR) between primary coil (L1) and secondary coil (L2), and stops transmission of electricity.Thus, can prevent reliably that heating, scald or equipment in the foreign matter (AR) is impaired or destroy.Therefore, the foreign matter that in non-contact power transmitting system, can realize high reliability inserts countermeasure.
And; Have or not the insertion foreign matter owing to need to hope prudent judgement; Therefore; Preferred transmission of electricity side control circuit 22 detects load variations in each cycle in a plurality of cycles, in the time can't detecting load variations continuously in the cycle in specified quantity, then judge between primary coil and the secondary coil to be inserted with foreign matter.
For example,, detect the load variations of current-collecting device side, in the time can't detecting load variations continuously in the cycle (for example 3 cycles) in specified quantity, stop normal transmission of electricity in each cycle in a plurality of cycles.Thus, improved the detection accuracy that foreign matter inserts, for example can not take place to stop the thing of normal transmission of electricity by error because accidental former thereby can't detect load variations the time.
In addition, the waveform of induced voltage that can be through detection of primary coil (L1) detects from the load variations of power transmitting device 10 observed current-collecting device 40 sides, and this waveforms detection is undertaken by waveform detection circuit 22.
As stated, the waveform peak (amplitude) of the induced voltage of primary coil (L) increases when the load of current-collecting device 40 sides is heavier, and when light, reduces, and therefore, can detect the load variations of current-collecting device 40 sides through the peak value of detection waveform.But, be not limited to this detection method, also can adopt additive method, for example, the method for the induced voltage of detection of primary coil or the phase place of electric current.
As stated, according to this execution mode, can realize having the new power transmitting device 10 that carries out inserting the function of (occupying) detection based on the foreign matter of regular load authentication.According to this execution mode, can be in control assembly quantity, through simple signal processing, the foreign matter that detects accurately between primary coil and the secondary coil inserts, and can realize the Security Countermeasures of the high-reliability in the contactless transmission of electricity.
And, not only be used to occupy detection based on the transmission of electricity hold function of regular load authentication, also can become the mandatory last fort that stops inappropriate when transmission of electricity.For example, for various reasons, when not detecting the removal that receives electric side apparatus effectively, or receive electric side apparatus by damaged or break down, thereby can't carry out regular load-modulate the time etc., transmission of electricity can be stopped reliably from the transmission of electricity side apparatus.Therefore, owing to have regular load authentication function, so significantly improved the fail safe and the reliability of non-contact power transmitting system.
(the 3rd execution mode)
In this execution mode, describe being full of recharging behind the electricity.After being full of electricity, if for example as be placed on for a long time on the cradle (carriage) by the portable telephone terminal of electric side apparatus, then voltage is owing to the discharge of storage battery reduces, and storage battery becomes the state that need recharge.Thereby at this execution mode, after being full of electricity, power transmitting device detects the necessity that recharges automatically.
(be full of electricity after recharge)
Figure 10 (A) and Figure 10 (B) be expression in the non-contact power transmitting system, be used to manage the sequential chart that is full of a series of actions step that recharges behind the electricity.In addition, the step shown in Figure 10 (B) is after the step shown in Figure 10 (A), to carry out.
Be full of electricity condition if storage battery 94 (with reference to Fig. 2) becomes, then forward the standby mode that is full of behind the electricity to.Be full of in the standby mode of electricity back at this, power transmitting device 10 transmit electricity to current-collecting device 40 off and on, at this moment to current-collecting device 40 send expression be full of electricity after standby mode content.If current-collecting device 40 receives the content that expression is full of electricity back standby mode, then confirm battery tension VBAT.And battery tension VBAT is judged as the state that need recharge for recharging voltage (for example 3.9V) when following, sends to power transmitting device 10 and recharges instruction.Thus, power transmitting device 10 begins normally to transmit electricity to current-collecting device 40 once more.Thereby, on the other hand, when battery tension VBAT when recharging voltage, continue to be full of electricity back standby mode.Specify below.
Transmission of electricity side control circuit 22 shown in Figure 2 is in when being full of electricity condition detecting storage battery 94 that load has, stops the normal transmission of electricity to current-collecting device 40, the transmission of electricity of having a rest of going forward side by side in the ranks.And, when transmission of electricity side control circuit 22 detects storage battery 94 and becomes the state that need recharge during this is intermittently transmitted electricity, control, normally transmit electricity for current-collecting device 40 so that begin once more.
On the other hand; Shown in Figure 2 become at storage battery 94 by electric side control circuit 52 to be full of electricity condition; And power transmitting device 10 has stopped normal transmission of electricity and has gone forward side by side when having a rest transmission of electricity in the ranks; Control, so that send the instruction that recharges of notifying the information relevant to power transmitting device 10 in during this is intermittently transmitted electricity with the state that recharges of storage battery 94.At this moment by being full of the electricity condition that is full of that power detection circuit 62 detects storage battery 94, by the state that recharges that recharges supervisory circuit 64 monitoring storage batterys 94.In addition, the so-called information relevant with the state that recharges is the information that is used to judge the battery tension VBAT after whether storage battery 94 becomes the information of the state of recharging, the information that whether need recharge or be full of electricity.
More particularly; Shown in the A1 of Figure 10 (A); Become at storage battery 94 by electric side control circuit 52 and carry out following control when being full of electricity condition, for example through based on the load-modulate of load-modulate portion 46 to power transmitting device 10 send notice become be full of electricity condition be full of electricity instruction (being full of electrical information).And, shown in A2, stop control to battery charge controller 92 output VOUT voltages (electric power supply).For example, if detect and be used to represent that the LEDR of charged state for example extinguished 5 seconds continuously through being full of power detection circuit 62, then control circuit 52 is judged that storage batterys 94 are in and is full of electricity condition (complete charge).Then, generation is used to send the frame that is full of the electricity instruction, carries out load-modulate through control signal P3Q, sends the frame that is generated to power transmitting device 10.
On the other hand; Transmission of electricity side control circuit 22 is receiving in the process of normally transmitting electricity to current-collecting device 40 when being full of the electricity instruction; Shown in the A3 of Figure 10 (A), will be full of electrosemaphore FC and be set at 1, shown in A4; T1 between the first phase controls in (for example 1 second), so that stop to current-collecting device 40 transmissions of electricity.Afterwards, shown in A5, begin transmission of electricity once more, the transmission of electricity of having a rest of going forward side by side in the ranks.And; During the transmission of electricity at intermittence after beginning once more to transmit electricity; Shown in A6; Control, be used to indicate recharging of the state that recharges that detects storage battery 94 (detect the state that need recharge of whether being in, or detect the battery tension after being full of electricity) to detect instruction so that send to current-collecting device 40.That is to say that power transmitting device 10 generates through the method for explaining with reference to Fig. 3 (A) and recharges the frame that detects instruction, and sends to current-collecting device 40.And, shown in A7, control circuit 22 transmission recharge detect instruction after, up to through (the 300msec for example of T2 during the waiting-timeout.T2＜T1, the T1 stopping period of transmitting electricity) during till, do not receive from current-collecting device 40 to be judged as overtime when recharging instruction.And, under overtime situation, shown in A8, during stop transmission of electricity once more in the T1 for current-collecting device 40, shown in A9, during the transmission of electricity at intermittence after beginning once more to transmit electricity, control detect instruction so that send to recharge to current-collecting device 40 once more.In addition, in the explanation below, the stopping period T1 that will transmit electricity sometimes was called between the first phase, and T2 during the waiting-timeout is called the second phase.
Shown in the A10 of Figure 10 (A), after transmission is full of the electricity instruction, stop transmission of electricity from power transmitting device 10, thereby, receive controller for electric consumption 50 to become reset mode.That is, from power transmitting device 10 supply capability not, therefore, supply voltage becomes 0V, becomes reset mode.And; Shown in A11,, receive to recharge from power transmitting device 10 and detect instruction if receive electric side control circuit 52 after being disengaged reset mode through the transmission of electricity at intermittence of sending from power transmitting device 10; Then shown in A12, carry out the monitoring of the state that recharges of storage battery 94 and handle.That is, the monitoring and judge whether storage battery 94 is in the state that need recharge.The processing that perhaps also can monitor battery tension VBAT and send to power transmitting device 10.The above-mentioned monitoring that recharges state is handled and can be carried out based on the monitored results that recharges supervisory circuit 64 shown in Figure 2.
In the B1 of Figure 10 (B), receive electric side control circuit 52 to send the instruction that recharges of the notice information relevant to power transmitting device 10 with the state that recharges of storage battery 94.For example, if receive electric side control circuit 52 to judge that based on the monitored results that recharges monitoring circuit 64 storage battery 94 is in the state that need recharge, then send and recharge instruction to power transmitting device 10.And, if receiving from current-collecting device 40, transmission of electricity side control circuit 22 recharges instruction, then shown in B2, will be full of electrosemaphore FC and be set at 0, shown in B3, begin once more normally to transmit electricity to current-collecting device 40.That is,, begin normal transmission of electricity once more when judging storage battery 94 and be in to recharge state the time based on recharging instruction.Thus, begin recharging of storage battery 94, thereby can the storage battery 94 that voltage descends be recharged.
The job step of non-contact power transmitting system of carrying out the ID authentication automatically, normally transmit electricity, be full of electro-detection and recharging a series of actions of management is put in order, then shown in figure 11.Figure 11 shows and carries out the ID authentication automatically, normally transmits electricity, is full of electro-detection and recharge the flow chart of job step of non-contact power transmitting system of a series of actions of management.
At first, the processing to the transmission of electricity side describes.The transmission of electricity side (simple side) and receive the ID authentication of electric side (primary side) if be through with, the side of then transmitting electricity will be full of electrosemaphore FC and be set at 0 (step S1, S2).And, begin to receiving electric side normally transmit electricity (step S3).Afterwards, load and unload (removal) and detect (step S4), when detecting loading and unloading (removal), forward normal standby mode to.That is, in Fig. 1 (A), pocket telephone 510 breaks away from charger 500 physics, and the magnetic flux that becomes primary coil L1 does not pass the state of secondary coil L2, then detects loading and unloading (removal), and forwards common standby mode to.In this normal standby mode, be not full of the such transmission of electricity at intermittence of electricity back standby mode, but till pocket telephone 510 is placed on the charger 500 once more, stop electric power transfer fully.
Secondly, the side of transmitting electricity judges whether to be full of electricity instruction (step S5) from received by electric side joint, when reception is not full of the electricity instruction, returns step S4.On the other hand, received when being full of the electricity instruction, will be full of electrosemaphore FC and be set at 1 (step S6).And, between the first phase, stop the transmission of electricity (step S7) that carried out by electric side from the transmission of electricity side direction in (transmission of electricity stopping period) T1.During this period T1 is that the computing of the clock signal through the transmission of electricity side comes instrumentation.
If the transmission of electricity side has been passed through T1 between the first phase, then begin transmission of electricity once more, the transmission of electricity of in the ranks having a rest of going forward side by side recharges detection instruction (step S8) to sent by electric side.That is, generation is used to indicate the frame that detects the state that recharges, and through frequency modulation(FM), to sent by electric side.Then, wait for through the second phase (during the waiting-timeout) T2 and overtime (step S9).That is, wait for receiving electric side to be disengaged reset mode, begin action, and send and recharge instruction through transmission of electricity intermittently.Then,, load and unload detections (removing detection) (step S10), when detecting loading and unloading (removal), forward common standby mode to up to through in during till the second phase T2.And up to through in during till the second phase T2, whether monitoring from received by electric side joint to recharge instruction (step S11), recharges when instructing when not receiving, and returns step S9.Afterwards, if, then return step S7, stop to receive the transmission of electricity of electric side once more from the transmission of electricity side direction having passed through second phase T2 and overtime.And, after through transmission of electricity stopping period T1, carry out the transmission of electricity at intermittence, recharge detection instruction (step S8) to sent by electric side once more.As stated, up to till received by electric side joint to recharge instruction, transmission of electricity stresses multiple transmission of electricity and stops and intermittently transmission of electricity.
If the transmission of electricity side recharges instruction at step S11 from received by electric side joint, then return step S2, will be full of electrosemaphore FC and be set at 0.And, begin to be used for the normal transmission of electricity (step S3) that storage battery is recharged once more.Thus, begin the storage battery 94 that voltage descends is recharged.
Then, the processing that receives electric side is described.If finish to receive the ID authentication of electric side and transmission of electricity side, then receive electric side to begin normally to receive electricity (step S21, S22).Judging afterwards whether storage battery 94 becomes is full of electricity condition, is becoming when being full of electricity condition, sends to the transmission of electricity side to be full of electricity instruction (step S23, S24).That is, generate the frame that notice is full of electricity, and, send to the transmission of electricity side through load-modulate.Thus, the transmission of electricity side will be full of electrosemaphore FC and be set at 1, and stop transmission of electricity (step S6, S7).Afterwards, stopped to battery charge controller 92 output VOUT voltages (step S25) by electric side.That is, by transistor T B2, TB1 shown in Figure 2, cut off with load 90 between be electrically connected.Specifically, make signal P1Q become the H level through control circuit 52, thus "off" transistor TB2.
If in step S7 shown in Figure 11, the transmission of electricity side stops transmission of electricity, and become by electric side does not have the state of power supply, therefore, becomes reset mode.Afterwards, if the transmission of electricity side begins intermittently transmission of electricity, then receive electric side to be supplied to electric power, risen by the supply voltage of electric side, reset mode is disengaged (step S26).So, receive electric side to judge whether to receive and recharge detection instruction (step S27).And when reception does not recharge the detection instruction, forward normal ID authentication processing to.That is, carrying out normal standby mode handles.
Recharge when detecting instruction when receiving, judge whether to carry out recharge (the step S28) of storage battery 94.Specifically, judge that whether battery tension VBAT is less than recharging voltage (for example 3.9V).Then, when judging need not recharge the time, can not reply to the transmission of electricity side.Thus, in the step S9 of transmission of electricity side, become overtimely, stop to come from the transmission of electricity of power transmitting device once more, receive electric side to become reset mode.
On the other hand, judge to recharge the time, sent by electric side and recharge instruction (step S29) at step S28.Recharge instruction if the transmission of electricity side joint is received, then will be full of electrosemaphore FC and be set at 0, begin normal transmission of electricity (step S2, S3) once more.Thus, receive electric side also to begin normally to receive electricity (step S22) once more, disengaging is full of electricity back standby mode.
As stated, according to this execution mode, be full of electricity if detect storage battery 94, the side of then transmitting electricity stops transmission of electricity (step S7).And, stopped to battery charge controller 92 output VOUT (step S25) by electric side, and forward to and be full of electricity back standby mode.Be full of in the standby mode of electricity back at this, stop to come from the transmission of electricity of side of transmit electricity, therefore, receive controller for electric consumption 50 to become reset mode, stop VOUT simultaneously and export, so battery charge controller 92 also becomes reset mode.Thereby, can significantly reduce receiving standby current mobile in controller for electric consumption 50 or the battery charge controller 92, can realize power saving.
And, according to this execution mode, receiving after electric side becomes reset mode, the transmission of electricity side is carried out intermittence transmission of electricity, and sends to recharge to detect and instruct (step S8).Thus, receive electric side when being disengaged reset mode, according to the indication that detects instruction that recharges that is received, (step S27, S28) handled in the monitoring that recharges state.Then, be judged as to recharge the time, sending and recharge instruction (step S29).
That is, receive electric side to stop to become reset mode, therefore, can't keep by electric side and be full of electricity or recharge relevant information through transmission of electricity.On the contrary, the transmission of electricity side can keep these information.In this execution mode, be conceived to this point, during the transmission of electricity at intermittence after stopping to transmit electricity, the transmission of electricity side direction is sent by electric side to recharge to detect instruction.Like this, not having to keep and be full of electricity or recharge relevant information even be disengaged the electric side that receives of reset mode, can be that opportunity begins to monitor the state that recharges to detect instruction from recharging of transmission of electricity side also.Afterwards, be judged as to recharge state the time by electric side, send and recharge instruction, thereby be to recharge state to transmission of electricity side notice.Thus, can be suitably the storage battery 94 that is full of behind the electricity be recharged.
On the other hand, the transmission of electricity side during do not receive in the T2 and recharge instruction and become under the overtime situation, stop transmission of electricity (step S9, S7) once more.That is, till reception recharges instruction, repeat transmission of electricity and stop and intermittently transmission of electricity.Thereby, receive electric side as long as work in during intermittently transmitting electricity, thereby be set at abundant length through the stopping period T1 that will transmit electricity, can significantly reduce the standby current that is full of under the standby mode of electricity back.Thereby, can unnecessary power consumption be suppressed at minimum zone, realize that simultaneously the best of storage battery 94 recharges.
(the 4th execution mode)
At this execution mode, detect and describe being full of the removal (loading and unloading) that receives electric side apparatus (primary side equipment) behind the electricity.For example, carry out intermittence transmission of electricity, at the appointed time, whether receive above-mentioned ID authentication information, thereby detect the removal that receives electric side apparatus (loading and unloading) that is full of behind the electricity from current-collecting device 40 according to 10 pairs of current-collecting devices of power transmitting device 40.That is, storage battery 94 becomes and is full of electricity condition, then stops normal transmission of electricity.Thus, the battery charge controller 92 (with reference to Fig. 2) that is arranged in the load 90 resets, and returns initial condition.After storage battery is full of electricity; If carry out the transmission of electricity at intermittence with predetermined distance from power transmitting device 10; Then accept to move based on the current-collecting device of this electric power of intermittently transmitting electricity; As stated, send the ID authentication information (with reference to step S4 shown in Figure 4) that receives electric side apparatus 510 (perhaps current-collecting device 40) to power transmitting device 10.Thereby, do not receive electric side apparatus 510 if remove, then, should send the ID authentication information to power transmitting device 10 from current-collecting device 40 in the beginning stipulated time that intermittently moment of transmission of electricity begins.When not sending to current-collecting device 10ID authentication information at the appointed time, power transmitting device 10 can be judged and be removed by electric side apparatus 510.In addition, shown in figure 14, whether the AC wave shape (that is the amplitude of alternating voltage) of coil-end that also can be through observation primary coil L1 detects and be removed by electric side apparatus 510.
In this execution mode, except being used to detect the transmission of electricity at intermittence that whether need recharge, also be used to detect the transmission of electricity at intermittence of removal.As stated, the period 1 T10 that detection is full of the removal behind the electricity is set at the longer cycle (for example 5 seconds) in cycle (for example 0.3 second) than temporary transient transmission of electricity, thereby suppresses the increase of power consumption.And, be used to detect be full of behind the electricity recharge need whether frequency can be lower, therefore, T20 second round that is used to be full of electro-detection sets for than period 1 T10 longer (for example setting 10 minutes for).Thus, when power consumption is suppressed at minimum degree, with the cycle of the best carry out primary side equipment detection is set, be full of behind the electricity recharge need whether detection and be full of electricity after various detections such as removal detection.
Like the explanation of above, at least one execution mode of the present invention, can provide a kind of user's ease of use high, and can suppress the contactless power transmission technology of power consumption.And, at least one execution mode of the present invention, a kind of contactless power transmission technology of high reliability of having taked perfectly sound Security Countermeasures is provided.And, at least one execution mode of the present invention, can reduce number of components, and can realize miniaturization and cost degradation.
That is,, can obtain following effect according to execution mode at least one.But, do not limit the effect below obtaining simultaneously, and following effect can not be as the foundation that limits technical scope of the present invention irrelevantly.
(1) in non-contact power transmitting system of the present invention, detect the setting that receives electric side apparatus automatically, and the normal transmission of electricity of beginning, therefore, the user need not to carry out switching manipulation etc., improves user's ease of use.
(2) through after the ID authentication, normally transmitting electricity, thereby can normally not transmit electricity, improve reliability and fail safe to the equipment of the system of being not suitable for.
(3) in normal transmission of electricity process, carry out various testings (removal detection, metallic foreign body detection, basis receive the regular load authentication checks of electric side to occupy state, be full of electro-detection), when detecting any one; Stop normal transmission of electricity rapidly, and return initial condition, therefore; Any unnecessary transmission of electricity can not take place; Foreign matter is also taked perfectly sound countermeasure, therefore, can realize having the system of extreme high reliability (fail safe).
(4) not only take normal foreign matter countermeasure, also taked to occupy the heating countermeasure, thereby significantly improved the fail safe of system.And in current-collecting device, when being used to detect the intermittent loads modulation (load-modulate regularly) of occupying, through alleviating load, power transmitting device can detect load change reliably, has improved the accuracy of occupying detection.
(5) and, after being full of electricity, recharge management (with remove detecting) automatically, therefore, even when receiving electric side apparatus to be placed on the cradle for a long time, storage battery also can remain the state that is full of electricity.Therefore, user's non-contact power transmitting system of can feeling at ease to use can obtain pure satisfaction.
(6) non-contact power transmitting system of the present invention has automatic mode (automatic performance mode), and in automatic mode, above-mentioned a series of activities all automatically performs.Therefore, can not bring burden, can realize the non-contact power transmitting system that ease of use is very high, easy to use to the user.
(7) receive detections is set, receives recharging management and remove and detect behind the full electricity of electric side apparatus according to transmitting electricity, therefore, can suppress power consumption, the lower non-contact power transmitting system of realization power consumption from the intermittence of power transmitting device.If with above-mentioned purpose accordingly, in the cycle of intermittently transmission of electricity each is set at the best, then can further suppress power consumption.
(8) device constitutes simplification, thereby can realize miniaturization, the cost degradation of non-contact power transmitting system.
More than, describe the present invention with reference to execution mode, but the invention is not restricted to foregoing, various distortion, application can be arranged.That is, for a person skilled in the art, in the scope that does not break away from main idea of the present invention, various deformation can be arranged.
Thereby such variation within the scope of the present invention.For example; In specification or accompanying drawing; At least once so that the more different terms of broad sense or synonym (low potential side power supply, electronic equipment etc.) are by the term of putting down in writing simultaneously (GND, pocket telephone, charger etc.), the optional position in specification or accompanying drawing all can replace to its different terms.And the combination of all these execution modes and variation is also contained in the scope of the present invention.
And, power transmission control device, power transmitting device, receive the formation of controller for electric consumption, current-collecting device and the load detecting method that receives electric side in action or the power transmitting device also to be not limited to the content explained in this execution mode, can there be various distortion to implement.For example, in above-mentioned execution mode, the transmission of electricity that is full of behind the electricity is that intermittence is carried out, but also can reduce the continuous transmission of electricity (energy-conservation transmission of electricity) of electric power (power).When energy-conservation transmission of electricity,, compare with the transmission of electricity at intermittence owing to be continuous transmission of electricity; A little increase of power consumption, but also have the following advantages, promptly, supply with through continuous electric power; Even after being full of electricity; Be arranged on the also action all the time of battery charge controller 92 in the load 90, therefore, can often recharge and whether to judge and to remove detection.
It is a kind of easy to use that the present invention can realize providing; And the effect of the non-contact power transmitting system of high-reliability, low-power consumption; Therefore, be particularly useful as power transmission control device (transmission of electricity control IC), power transmitting device (IC module etc.), non-contact power transmitting system and electronic equipment (for example portable terminal and charger) etc.In addition, comprise portable telephone terminal, PDA terminal, portable terminal in " portable terminal ".
And the present invention also is applicable to the system (carrying out the electrical power transmission system of the point-contact type transmission means of electric power transfer after for example, between the electrical power transmission system of wire transmission mode or the connecting terminal) of other transmission meanss except non-contact power transmitting system.
Reference numeral
L1 primary coil L2 secondary coil
10 power transmitting devices, 12 transmission of electricity portions
14 waveform monitor circuits, 16 display parts
20 power transmission control devices, 22 transmission of electricity control circuits
24 oscillating circuits, 26 Drive and Control Circuit
28 waveform detection circuit, 40 current-collecting devices
42 power receiving sections, 43 rectification circuits
46 load-modulate portions, 48 power supply control parts
50 receive controller for electric consumption 52 to receive electric side control circuit
56 position detecting circuits, 58 oscillating circuits
60 frequency detection circuits 62 testing circuit that completely charges
90 receive the load of electric side apparatus
92 battery charge controllers (charging control IC)
94 storage batterys (secondary cell) as load
LEDR is as the light-emitting device of the indicating device of residual capacity of battery or battery status

Claims (20)

1. power transmission control device; Said power transmission control device is arranged in the power transmitting device in the non-contact power transmitting system; Said non-contact power transmitting system from said power transmitting device via the primary coil of electromagnetic coupled and secondary coil with contactless mode to the current-collecting device transferring electric power; Said power transmission control device is characterized in that, comprising:
Transmission of electricity side control circuit is used to control the transmission of electricity to said current-collecting device,
Said transmission of electricity side control circuit makes said power transmitting device carry out intermittent temporary transient transmission of electricity; And detect to come from and accepted replying based on the said current-collecting device of the said electric power of said temporary transient transmission of electricity; Detect the electric side apparatus that receives thus and be set at the position that can receive electricity through contactless electric power transfer with said current-collecting device
Detect said receive electric side apparatus be set at can through contactless electric power transfer receive the electricity the position time; Said transmission of electricity side control circuit makes said power transmitting device carry out the continuous normal transmission of electricity for said current-collecting device; When not detecting said the setting; Said transmission of electricity side control circuit makes said power transmitting device continue to carry out the state of said intermittent temporary transient transmission of electricity
Said transmission of electricity side control circuit detects the state of occupying; If in said normal transmission of electricity process, detect the state of occupying; Then make said power transmitting device stop said normal transmission of electricity; Said power transmitting device is returned to carry out the state of the temporary transient transmission of electricity of said intermittence, wherein, the said state of occupying is to think by mistake and saidly receive electric side apparatus and continue the state of said normal transmission of electricity being arranged on foreign matter between said primary coil and the said secondary coil.
2. power transmission control device according to claim 1 is characterized in that,
Said transmission of electricity side control circuit is saidly carried out the ID authentication processing when receiving being provided with of electric side apparatus detecting, if said ID authentication success then makes said power transmitting device carry out normal transmission of electricity.
3. power transmission control device according to claim 2 is characterized in that,
Said transmission of electricity side control circuit detects the setting that receives electric side apparatus that comprises said current-collecting device according to beginning whether can receive at the appointed time the ID authentication information that comes from said current-collecting device the zero hour from said temporary transient transmission of electricity.
4. according to each described power transmission control device in the claim 1 to 3, it is characterized in that,
Said transmission of electricity side control circuit has judged whether foreign matter according to the wave form varies of the induced voltage signal of said primary coil; When in said normal transmission of electricity process, detecting foreign matter; Said transmission of electricity side control circuit makes said power transmitting device stop said normal transmission of electricity, said power transmitting device is returned to carry out the temporary transient state of transmitting electricity of said intermittence.
5. power transmission control device according to claim 4 is characterized in that,
Said transmission of electricity side control circuit detects the said removal that receives electric side apparatus according to the wave form varies of the said induced voltage signal of said primary coil; When in said normal transmission of electricity process, detecting the removal of said current-collecting device; Said transmission of electricity side control circuit makes said power transmitting device stop said normal transmission of electricity, makes said power transmitting device return to the state of carrying out the temporary transient transmission of electricity of said intermittence simultaneously.
6. power transmission control device according to claim 1 is characterized in that,
When foreign matter was arranged, the signal that said current-collecting device side is sent was owing to being blocked by foreign matter and can't arriving said power transmitting device, and in view of the above, said transmission of electricity side control circuit detects the said state of occupying.
7. power transmission control device according to claim 1 is characterized in that,
Said transmission of electricity side control circuit detects from the intermittence of the said current-collecting device lateral load of said power transmitting device observation and changes, and changes according to the intermittence that in said normal transmission of electricity process, whether detects said load, detects the said state of occupying.
8. power transmission control device according to claim 7 is characterized in that,
Through the load-modulate of said current-collecting device, change to the duty cycle property of the current-collecting device side of observing from said power transmitting device in the said normal transmission of electricity process,
Said transmission of electricity side control circuit detects the said state of occupying according in the cycle of specified quantity, whether being consecutively detected said load variations.
9. power transmission control device according to claim 1 is characterized in that,
Said transmission of electricity side control circuit detects in said normal transmission of electricity process and comes from when being full of of said current-collecting device is electric to be notified; Make said power transmitting device stop said normal transmission of electricity; Transmission of electricity and the judgement that said power transmitting device is carried out be full of removal behind the electricity to detect usefulness is full of the transmission of electricity that whether need recharge usefulness behind the electricity
According to the input of sending during to said removals from the said current-collecting device of having accepted to be used for the transmission of electricity that the said removal that is full of behind the electricity detects, said power transmitting device is returned to carry out the state that said intermittence is temporarily transmitted electricity,
According to said when being full of behind the electricity signal that said current-collecting device that needs whether recharge the transmission of electricity of usefulness sends and judging needs and recharge, make said power transmitting device begin said normal transmission of electricity once more from having accepted to judge.
10. power transmission control device according to claim 9 is characterized in that,
The transmission of electricity that said detection is full of the removal use behind the electricity is the intermittence transmission of electricity based on the period 1,
Judge saidly to be full of the transmission of electricity that whether need recharge use behind the electricity and to be intermittence transmission of electricity based on second round,
The said period 1 is longer than the cycle of the temporary transient transmission of electricity of said intermittence, and said second round is greater than the said period 1.
11. a power transmission control device is arranged at the power transmitting device to the current-collecting device transferring electric power, said power transmission control device is characterised in that and comprises:
Position detection part is used to detect the position of said current-collecting device; And
The transmission of electricity control part is used to control the action of said power transmitting device,
Wherein, said transmission of electricity control part makes said power transmitting device carry out intermittent transmission of electricity,
Detect when coming from the replying of the said current-collecting device of having accepted said intermittent transmission of electricity at said position detection part, said transmission of electricity control part is transmitted electricity said power transmitting device continuously,
When said position detection part did not detect said replying, said transmission of electricity control part made said power transmitting device continue said intermittent transmission of electricity,
Said transmission of electricity control part detects the state of occupying; If in said continuous transmission of electricity process, detect the state of occupying; Then make said power transmitting device stop said continuous transmission of electricity; Make said power transmitting device return to the state of carrying out said intermittent transmission of electricity simultaneously, wherein, the said state of occupying is to think the foreign matter that is arranged between primary coil and the secondary coil by mistake receive electric side apparatus and continue said continuous transmission of electricity state.
12. a power transmitting device is characterized in that comprising:
According to each described power transmission control device in the claim 1 to 11 and generate alternating voltage and supply with the transmission of electricity portion of primary coil.
13. a non-contact power transmitting system, via by the primary coil of electromagnetic coupled and secondary coil from power transmitting device to the contactless transferring electric power of current-collecting device, it is characterized in that,
Said power transmitting device comprises transmission of electricity side control circuit, and said transmission of electricity side control circuit is controlled the transmission of electricity to said current-collecting device according to the induced voltage of primary coil,
Said current-collecting device comprises power supply control part and receive controller for electric consumption, and the electric power that said power supply control part is used to control load is supplied with, the said electric side control circuit that receives that comprised by controller for electric consumption to be used to control said current-collecting device,
The said transmission of electricity side control circuit of said power transmitting device makes said power transmitting device carry out intermittent temporary transient transmission of electricity; Come from through detection and to receive replying based on the said current-collecting device of the said electric power of said temporary transient transmission of electricity; Detect the electric routine equipment that receives that comprises said current-collecting device and be set at the position that can receive electricity through contactless electric power transfer; When detecting said the setting, make said power transmitting device carry out continuous normal transmission of electricity, when not detecting said the setting to said current-collecting device; Make said power transmitting device continue to carry out the state of the temporary transient transmission of electricity of said intermittence
Said transmission of electricity side control circuit detects the state of occupying; If in said normal transmission of electricity process, detect the state of occupying; Then make said power transmitting device stop said normal transmission of electricity; Said power transmitting device is returned to carry out the state of the temporary transient transmission of electricity of said intermittence, wherein, the said state of occupying is to think by mistake and saidly receive electric side apparatus and continue the state of said normal transmission of electricity being arranged on foreign matter between said primary coil and the said secondary coil.
14. non-contact power transmitting system according to claim 13 is characterized in that,
Said current-collecting device is carried out intermittent temporary transient transmission of electricity; According to beginning whether can receive at the appointed time the ID authentication information of replying the zero hour as from said current-collecting device from said temporary transient the transmission of electricity; Detect the said said setting that receives electric side apparatus,, then utilize the ID authentication information of said reception to carry out the ID authentication processing of said current-collecting device if detect said setting; If ID authentication success; Then make said power transmitting device that said current-collecting device is carried out continuous normal transmission of electricity, when not detecting said the setting and during said ID authentification failure, make said power transmitting device continue to carry out the state of the temporary transient transmission of electricity of said intermittence.
15. according to claim 13 or 14 described non-contact power transmitting systems, it is characterized in that,
During said normal transmission of electricity; Said transmission of electricity side control circuit has judged whether foreign matter according to the wave form varies of the induced voltage signal of said primary coil; When detecting foreign matter; Said transmission of electricity side control circuit makes said power transmitting device stop said normal transmission of electricity, makes said power transmitting device return to the state of carrying out the temporary transient transmission of electricity of said intermittence simultaneously.
16. non-contact power transmitting system according to claim 15 is characterized in that,
Said current-collecting device also comprises load-modulate portion, after said normal transmission of electricity begins, saidly receives electric side control circuit that said load-modulate portion is moved, and carries out regular load-modulate,
The said transmission of electricity side control circuit of said power transmitting device detects from the regular variation of the said current-collecting device lateral load of said power transmitting device observation; In said normal transmission of electricity process; If when not detecting the regular variation of said load, make said power transmitting device stop said normal transmission of electricity.
17. non-contact power transmitting system according to claim 16 is characterized in that,
Said current-collecting device comprises the electro-detection portion that is full of, and saidly is full of the electricity that is full of that electro-detection portion is used to detect said load,
Detecting when being full of electricity through the said electro-detection portion that is full of, saidly receiving electric side control circuit to make said load-modulate portion carry out load-modulate, and sending to said power transmitting device and to be full of the electricity notice,
In said normal transmission of electricity process; When detecting when being full of the electricity notice from said current-collecting device said; Said transmission of electricity side control circuit makes said power transmitting device stop normal transmission of electricity, simultaneously, also carries out the intermittence transmission of electricity based on the period 1 that the removal be full of behind the electricity detects usefulness; And be full of the intermittence transmission of electricity that judges whether to recharge usefulness behind the electricity based on second round; According to signal,, said power transmitting device is returned to carry out intermittent state of temporarily transmitting electricity if when detecting said removals from having accepted to send based on the said said current-collecting device that is full of the intermittence transmission of electricity of the period 1 behind the electricity; And; Signal according to from having accepted to send based on the said said current-collecting device that is full of the transmission of electricity at intermittence of the second round behind the electricity if judge in the time of need recharging, then makes said power transmitting device begin normal transmission of electricity once more.
18. according to claim 16 or 17 described non-contact power transmitting systems, it is characterized in that,
During said normal transmission of electricity; When making said load-modulate portion carry out said regular load-modulate; Saidly receive electric side control circuit through the said power supply control part of control, the electric power of said load is supplied with in mandatory reduction, and carries out the load reduction obviously alleviate said load and handle.
19. an electronic equipment is characterized in that,
Power transmitting device according to claim 12 is installed.
20. a power transmission control method is used to control from the transmission of electricity of power transmitting device to current-collecting device,
It is characterized in that,
Said power transmitting device carries out the intermittence transmission of electricity,
The said current-collecting device that receives said intermittent transmission of electricity is replied,
Said power transmitting device is through detecting said replying, and detection can receive the setting of the position of electricity through contactless electric power transfer for said current-collecting device,
When detecting said the setting, said power transmitting device is transmitted electricity continuously,
When not detecting said the setting, said power transmitting device is intermittently transmitted electricity,
State is occupied in detection; If in said transmission of electricity process continuously, detect the state of occupying; Then make said power transmitting device stop said transmission of electricity continuously; Said power transmitting device is returned to carry out the said intermittently state of transmission of electricity, wherein, the said state of occupying is to think by mistake and receive electric side apparatus and continue the said state of transmission of electricity continuously being arranged on foreign matter between primary coil and the secondary coil.
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