WO2011065254A1 - 非接触電力伝送装置 - Google Patents
非接触電力伝送装置 Download PDFInfo
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- WO2011065254A1 WO2011065254A1 PCT/JP2010/070360 JP2010070360W WO2011065254A1 WO 2011065254 A1 WO2011065254 A1 WO 2011065254A1 JP 2010070360 W JP2010070360 W JP 2010070360W WO 2011065254 A1 WO2011065254 A1 WO 2011065254A1
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- power transmission
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 66
- 230000008859 change Effects 0.000 claims abstract description 27
- 230000004907 flux Effects 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 23
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- 230000004048 modification Effects 0.000 description 5
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- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
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- 238000010168 coupling process Methods 0.000 description 2
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- 230000005674 electromagnetic induction Effects 0.000 description 2
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- 101100484930 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) VPS41 gene Proteins 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
- H04B5/266—One coil at each side, e.g. with primary and secondary coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
Definitions
- the present invention relates to a non-contact power transmission device that performs non-contact power transmission between devices using electromagnetic induction.
- a non-contact power transmission device that charges a secondary battery (battery) built in as a power source in a portable device such as a mobile phone or a digital camera.
- a primary coil and a secondary coil for transmitting / receiving charging power to a portable device and a dedicated charger corresponding to the portable device are provided, and alternating power is supplied from the charger to the portable device by electromagnetic induction by both the coils.
- the mobile device side converts this into DC power to charge the secondary battery.
- Patent Document 1 when alternating power is transmitted from the charger to the portable device, information for authentication or the like is superimposed on the alternating power by frequency-modulating the alternating power at a predetermined frequency. I have to.
- the portable device receives the alternating power transmitted after frequency modulation from the charger, and receives information for the authentication or the like through demodulation of the alternating power subjected to frequency modulation.
- the present invention has been made in view of such a situation, and an object of the present invention is to perform power transmission in a non-contact manner between a primary coil and a secondary coil with a simpler configuration.
- An object of the present invention is to provide a non-contact power transmission device capable of realizing the transmission of information.
- the first aspect of the present invention is a non-contact power transmission device.
- the apparatus is a resonance circuit including a switching element and a primary coil electrically connected to the switching element, and the alternating power according to the resistance value of the resonance circuit is supplied through the switching operation of the switching element.
- a resonance circuit that is induced in the primary coil; a secondary coil that receives the alternating power in a non-contact manner from the primary coil at a position that intersects with the alternating magnetic flux generated in the primary coil; and the alternating current in the primary coil
- the switching element is turned on / off so that electric power is induced, and the resistance value of the resonance circuit is changed based on information to be transmitted to the secondary coil, thereby being induced in the primary coil.
- a primary-side control device that modulates the amplitude of the alternating power, and oscillation of the alternating power received by the secondary coil in accordance with a change in the amplitude of the alternating power at the primary coil. From change, and a 2 and secondary side control unit that demodulates the information transmitted to the secondary coil.
- the second aspect of the present invention is a power transmission circuit for transmitting the electric power induced in the primary coil to the secondary coil in a non-contact manner.
- the power transmission circuit is a resonance circuit including a switching element and the primary coil electrically connected to the switching element, and generates alternating power according to a resistance value of the resonance circuit through a switching operation of the switching element.
- the circuit block diagram which shows the structure about 1st Embodiment of the non-contact electric power transmission apparatus concerning this invention.
- A is a time chart which shows the transition example of the alternating power (voltage) induced by the primary coil in the non-contact electric power transmission apparatus of FIG.
- B is a time chart showing a transition example of alternating power (voltage) induced in the secondary coil.
- C is a time chart which shows the example of a transition of the DC voltage by which the voltage induced in the secondary coil is full-wave rectified and taken into the secondary side control device.
- the block diagram which shows the structure about 2nd Embodiment of the non-contact electric power transmission apparatus concerning this invention.
- A is a time chart which shows the transition example of the control voltage (gate voltage) applied to the control voltage (gate voltage) of a switching element in the non-contact electric power transmission apparatus of FIG.
- B is a time chart showing a transition example of alternating power (voltage) induced in the primary coil.
- (C) is a time chart showing a transition example of alternating power (voltage) induced in the secondary coil.
- D is a time chart showing a transition example of a DC voltage that is full-wave rectified by the voltage induced in the secondary coil and taken into the secondary-side control device.
- the sequence diagram which shows an example of the transmission procedure of the information by the non-contact electric power transmission apparatus of a modification, and the transmission procedure of electric power.
- A is a circuit block diagram which shows the power transmission circuit of the non-contact electric power transmission apparatus provided with the variable resistance circuit used in order to change the ON resistance of a switching element
- (b) is a variable resistance circuit It is a circuit diagram which shows a structural example.
- the apparatus according to this embodiment supplies power to a portable device such as a digital camera, a shaver, or a notebook personal computer having a secondary battery as a power source (load) and the secondary battery of the portable device in a non-contact manner. And a charger.
- a portable device such as a digital camera, a shaver, or a notebook personal computer having a secondary battery as a power source (load) and the secondary battery of the portable device in a non-contact manner.
- a charger a charger.
- a full bridge composite resonance circuit 10 as a circuit for generating alternating power is mounted on the charger.
- a resonance circuit 12 (resonance unit) including a primary coil L1 to which alternating power is supplied is provided at the midpoint position of the full-bridge circuit 11 including switching elements FET1 to FET4 made up of field effect transistors. It is connected.
- the portable device receives the alternating power induced in the primary coil L1 by the full-bridge composite resonance circuit 10 via the secondary coil L2, and converts the received alternating power into direct-current power.
- the secondary circuit 20 that supplies the secondary battery 23 that is also a load is mounted.
- the control voltage (gate voltage) is applied to the switching elements FET1 to FET4 via the gate resistors R1 to R4 by the primary side control device 13 formed of a microcomputer.
- the switching elements FET1 and FET4 and the switching elements FET2 and FET3 are alternately turned on / off according to the gate voltage, so that the power supply E1 always Alternating power is induced in the primary coil L1 of the resonance circuit 12 by the supplied DC power.
- the resonance circuit 10 and the primary side control device 13 are provided as a power transmission circuit for transmitting the electric power induced in the primary coil L1 to the secondary coil L2 in a non-contact manner.
- the oscillation frequency of the alternating power oscillated through the resonance circuit 12 is about 100 to 200 kHz
- the duty ratio that is the ratio of the on / off time of the switching elements FET1 to FET4 is set to about “95%”.
- the capacitor C1 connected in series with the primary coil L1 in the resonance circuit 12 is for zero current switching, and reduces the switching loss when the switching elements FET1 to FET4 are turned off.
- the capacitor C2 connected in parallel with the primary coil L1 is for zero voltage switching, and reduces the switching loss when the switching elements FET1 to FET4 are turned on.
- a parallel circuit of resistance elements R7 to R10 having a predetermined resistance value and switches SW1 to SW4 is provided between the primary coil L1 and the switching elements FET1 to FET4. It is inserted electrically.
- the open / close state of each of the switches SW1 to SW4 is controlled by the primary-side control device 13 based on information to be transmitted from the charger to the portable device.
- the resistance value of the full bridge composite resonance circuit 10 including 12 is changed. That is, when the switches SW1 to SW4 are opened through the switching control by the primary side control device 13, the resistance elements R7 to R10 are electrically connected between the primary coil L1 and the switching elements FET1 to FET4.
- the resistance value of the full bridge composite resonance circuit 10 increases.
- the voltage induced in the primary coil L1 via the switching elements FET1 to FET4 decreases, and the amplitude of the alternating power (voltage) induced in the primary coil L1 decreases.
- the switches SW1 to SW4 are closed, the resistance elements R7 to R10 electrically interposed between the primary coil L1 and the switching elements FET1 to FET4 are bypassed ( The amplitude of the alternating power (voltage) induced in the primary coil L1 is maintained at the original high state. That is, the alternating power (voltage) induced in the primary coil L1 through the switching control of the switches SW1 to SW4 is amplitude-modulated.
- a secondary side circuit 20 that receives such alternating power via the secondary coil L2 includes a capacitor for impedance matching between the full bridge composite resonance circuit 10 and the secondary side circuit 20.
- C3 is connected in parallel to the secondary coil L2.
- the alternating power received by the secondary coil L2 is input to the full-wave rectifier circuit 21 including the diodes D1 to D4 via the capacitor C3, and is DC-rectified by being full-wave rectified by the full-wave rectifier circuit 21. Converted to electric power.
- the output terminals 21a and 21b of the full-wave rectifier circuit 21 are connected in parallel with a smoothing capacitor C4 and a DC-DC converter 22 that boosts the DC power (voltage) converted by the full-wave rectifier circuit 21, respectively.
- the boosted power (voltage) is supplied (charged) to the secondary battery 23 as a load.
- the DC power (voltage) rectified by the full-wave rectifier circuit 21 is also taken into the secondary-side control device 24 composed of a microcomputer through the diode D5, the resistance elements R5 and R6, and the capacitor C5 in this order. It is.
- the secondary-side control device 24 monitors the change in the level of the full-wave rectified DC voltage, that is, the change in the modulated amplitude, and the information to be transmitted from the charger side to the portable device side, For example, it is a part for demodulating a charger ID consisting of 8 bits.
- the contactless power transmission device AC power generated by the charger can be transmitted to the portable device in a contactless manner through electromagnetic coupling between the primary coil L1 and the secondary coil L2. It becomes like this.
- the standard of the portable device on which the secondary battery 23 is mounted conforms to the standard of the charger. It is desirable to be able to send and receive information for authentication. Therefore, in the first embodiment, the amplitude of the alternating power induced in the primary coil L1 is modulated by changing the resistance value of the full bridge composite resonance circuit 10, and this is demodulated through the secondary side control device 24. By doing so, it is possible to transmit information between the charger and the portable device.
- FIG. 2 (a) shows a transition example of the alternating power induced in the primary coil L1
- FIG. 2 (b) shows the alternating power induced in the secondary coil L2.
- FIG. 2C shows the transition of the voltage value of DC power taken into the secondary side control device 24.
- the alternating power induced in the primary coil L1 bypasses (non-intervenes) the resistance elements R7 to R10 through switching of the switches SW1 to SW4.
- the interval changes under the amplitude A1a (period T1 in FIG. 2A).
- the secondary coil L2 is induced with alternating power having an amplitude A2a according to the amplitude A1a of the alternating power induced in the primary coil L1 (see FIG. 2B).
- Period T1 Period T1
- FIG. 2C the voltage value of the DC power induced in the secondary coil L2 and full-wave rectified by the full-wave rectifier circuit 21 becomes the voltage Va (FIG.
- the secondary control device 24 that takes in the DC power determines whether or not the voltage value Va exceeds a threshold value V 0 that identifies the presence / absence (bypass) of the resistance of each of the resistance elements R7 to R10. Based on the above, it is determined whether the information transmitted from the charger is the logic level “H” or the logic level “L”. That is, in the period T1, it is determined that the information transmitted from the primary side control device 13 is the logic level “H”.
- the voltage value of the DC power taken into the secondary control device 24 also decreases from the voltage Va to the voltage Vb (period T2 in FIG. 2 (c)). Then, since the voltage value Vb is lower than the threshold value V 0, 2-side control unit 24 determines information transmitted from the primary-side control unit 13 in the period T2 and a logic level "L" .
- the resistance value of the full-bridge composite resonance circuit 10 is changed by switching between the non-intervening (bypass) of the resistance elements R7 to R10 by the switches SW1 to SW4.
- the amplitude of the alternating voltage induced in the primary coil L1 and the secondary coil L2 is modulated, and the modulated information can be transmitted through the demodulation by the secondary side control device 24.
- the information to be transmitted from the primary coil L1 to the secondary coil L2 is converted to, for example, 8-bit information as described above by modulating the amplitude of the alternating power through the change of the resistance value. We are going to modulate it.
- the following effects can be obtained.
- (1) The transmission of information from the primary coil L1 to the secondary coil L2 is alternately induced in the primary coil L1 and the secondary coil L2 that change according to the change in the resistance value of the full bridge composite resonance circuit The determination was made based on the change in power amplitude. Therefore, in transmitting information from the primary coil L1 to the secondary coil L2, power transmission through on / off control of the switching elements FET1 to FET4 and information from the primary coil L1 to the secondary coil L2 are performed. Can be transmitted simultaneously. As a result, in performing non-contact power transmission, information can be transmitted between the primary coil L1 and the secondary coil L2 with a simpler configuration, and Control related to transmission of alternating power and transmission of information is also facilitated.
- a resonance circuit provided in the charger is a full-bridge composite resonance circuit 10 in which a resonance circuit 12 including a primary coil L1 is connected to the midpoint position of the full-bridge circuit 11 including four switching elements FET1 to FET4. It was decided to compose. Thereby, the transmission efficiency of the alternating power generated through the on / off control of the switching elements FET1 to FET4 constituting the full bridge circuit 11 is preferably improved.
- the resistance value of the full bridge composite resonance circuit 10 including the resonance circuit 12 is electrically interposed between the resonance circuit 12 including the primary coil L1 and the switching elements FET1 to FET4 of the full bridge circuit 11.
- the change is made through open / close control by the respective switches SW1 to SW4 for switching between the presence / absence (bypass) of each of the resistance elements R7 to R10.
- the resistance value of the full-bridge composite resonance circuit 10 can be changed with a higher degree of freedom.
- the degree of freedom related to the modulation of the amplitude of the alternating power due to the change of the resistance value is increased. Can be enhanced.
- the switching elements FET1 to FET4 are configured by field effect transistors. As a result, it is possible to more easily realize generation of alternating power and modulation of the amplitude through on / off control of the switching elements FET1 to FET4. It goes without saying that the switches SW1 to SW4 can be realized by switching elements such as field effect transistors.
- the resistance value of the full-bridge composite resonance circuit 10 is changed by changing the resistance value between the two current terminals of the transistor elements that are turned on when the switching elements FET1 to FET4 are turned on (ON).
- the basic configuration is the same as that of the first embodiment. Therefore, the overlapping description about each of these elements is omitted.
- FIG. 3 shows a schematic configuration of the non-contact power transmission apparatus according to the second embodiment as a diagram corresponding to FIG. That is, as shown in FIG. 3, in the contactless power transmission apparatus of the second embodiment, the previous switches SW1 to SW4 and the resistance elements R7 to R10 are omitted. Then, the voltage value of the gate voltage as the control voltage applied to each of the switching elements FET1 to FET4 is adjusted by the primary side control device 13 based on information to be transmitted from the charger side to the portable device side, The on-resistance values of these switching elements are changed, and the resistance value of the full bridge composite resonance circuit 10 is changed.
- FIG. 4 shows an example of on-resistance characteristics of each of the switching elements FET1 to FET4.
- the adjustment of the voltage value of the gate voltage output from the primary side control device 13, that is, the on-resistance of the switching elements FET1 to FET4 is performed. It is assumed that the amplitude modulation of the alternating power induced in the primary coil L1 through the change of the value is performed.
- FIG. 5 (a) shows a transition example of the gate voltage (control voltage) applied to the switching elements FET1 to FET4 (for the sake of convenience, the time axis is shown enlarged).
- 5B shows a transition example of the alternating power induced in the primary coil L1
- FIG. 5C shows a transition example of the alternating power induced in the secondary coil L2
- FIG. ) Shows the transition of the voltage value of the DC power taken into the secondary side control device 24.
- the secondary side control device 24 takes in the DC power of the voltage Va (period T1 in FIG. 5 (d)).
- the secondary-side control device 24 uses a threshold value V 0 for identifying whether the voltage Va of the DC power and the voltage value of the gate voltage by the primary-side control device 13 are the voltage V1 or the voltage V2. And whether the information transmitted from the charger is at the logic level “H” or the logic level “L” based on the determination as to whether or not the voltage Va exceeds the threshold value V 0. . That is, in the period T1, it is determined that the information transmitted from the primary side control device 13 is the logic level “H”.
- the amplitude of the alternating power induced in the secondary coil L2 also changes from the amplitude A2a to the amplitude A2b as the amplitude of the alternating power induced in the primary coil L1 decreases. It decreases (period T2 in FIG. 5 (c)).
- the voltage value of the DC power taken into the secondary control device 24 also decreases from the voltage Va to the voltage Vb. Then, it is determined since the voltage Vb is lower than the threshold value V 0, 2-side control unit 24, information transmitted from the primary-side control unit 13 in the period T2 and a logic level "L".
- the primary coil is changed by changing the on-resistance value of each of the switching elements FET1 to FET4 through adjustment of the voltage value of the gate voltage applied to each of the switching elements FET1 to FET4.
- the amplitude of the alternating power induced in L1 is modulated. That is, the transmission of the information from the primary coil L1 to the secondary coil L2 is performed by changing the voltage value of the gate voltage to each of the switching elements FET1 to FET4 applied by the primary side control device 13. This also enables power transmission by turning on / off the switching elements FET1 to FET4 and modulation / demodulation of the amplitude thereof at the same time, thereby simplifying the configuration of the non-contact power transmission apparatus.
- the non-contact power transmission apparatus also achieves the effects according to the above (1), (2), and (4) according to the first embodiment.
- the following effect can be obtained instead of the effect (3).
- the change of the resistance value of the full-bridge composite resonance circuit 10 is realized by changing the on-resistance values of the switching elements FET1 to FET4.
- the resistance value of the full-bridge composite resonance circuit 10 can be changed in a manner that makes use of the characteristics of the switching elements FET1 to FET4 itself.
- the on-resistance value of each of the switching elements FET1 to FET4 is changed by changing the voltage value of the gate voltage that is the control voltage, the amplitude modulation of the alternating power through the change of the resistance value of the full-bridge composite resonance circuit 10 is performed. Can be realized with a simpler configuration.
- each said embodiment can also be implemented with the following forms.
- the portable device may further include a circuit capable of modulating the amplitude of the alternating power (voltage) induced in the secondary coil L2 based on a command from the secondary side control device 24,
- the charger further includes a circuit that extracts a change in the amplitude (modulated amplitude) of the alternating power (voltage) in the secondary coil L2, and the primary-side control device 13 includes the extracted alternating power.
- a function of demodulating information modulated on the portable device side from a change in amplitude of power (voltage) may be provided.
- the charger and the portable device can be provided with an intercommunication function illustrated in FIG. That is, as shown in FIG. 6, when a portable device is installed in the charger in step S101, the power for starting the secondary side control device 24 is generated through electromagnetic coupling between the primary coil L1 and the secondary coil L2. Power is transmitted to the secondary circuit 20 (step S102).
- the secondary side control device 24 when the electric power transmitted to the secondary side circuit 20 is supplied to the secondary side control device 24, the secondary side control device 24 is activated (step S103). Then, the activated secondary side control device 24 transmits the above-mentioned modulation for transmitting the start signal indicating that the secondary side control device 24 is started to the primary side control device 13 via the secondary coil L2. Done.
- the primary side control device 13 extracts the activation signal resulting from such modulation as a change in the amplitude of the alternating power (voltage) induced in the primary coil L1, and demodulates the extracted activation signal. In this manner, the activation signal as information is transmitted from the portable device to the charger (step S104).
- the charger ID consisting of, for example, 8 bits, which is information for authentication indicating the standard of the charger, etc. Is transmitted from the charger to the portable device as a change in the amplitude of the alternating power induced in the primary coil L1 described above (step S105).
- the information indicating the charger ID is transmitted to the portable device
- the information is demodulated by the secondary control device 24.
- the charger standard or the like is a device that conforms to the portable device standard or the like through this demodulation, for example, information indicating a portable device ID consisting of 8 bits and charging of the portable device are permitted.
- Information (charging permission signal) is transmitted from the portable device to the charging device by modulation via the secondary coil L2 (step S106).
- the primary control device 13 supplies power to the secondary battery 23 on the assumption that the portable device installed in the charger conforms to the standard of the charger (step S107).
- power can be accurately transmitted between the coils L1 and L2 based on the transmission of information between the primary coil L1 and the secondary coil L2.
- the battery can be charged with high reliability.
- information consisting of 8 bits is used as information to be transmitted between the primary coil L1 and the secondary coil L2.
- the number of bits is arbitrary, and for example, information consisting of 4 bits or 16 bits may be adopted.
- variable resistance circuits R11 to R14 are inserted between the primary side control device 13 and the control voltage application terminals (gate terminals) of the switching elements FET1 to FET4. May be.
- each of the variable resistance circuits R11 to R14 (here, only the configuration of the variable resistance circuit R11 is shown) includes a plurality of resistors connected in series or in parallel. It is possible to include an element and one or more switches that make the combined resistance of the resistance elements variable.
- the primary side control device 13 may change the voltage value of the control voltage (gate voltage) applied to the switching elements FET1 to FET4 through the switching control of the switches of the variable resistance circuits R11 to R14.
- field effect transistors are used as the switching elements FET1 to FET4.
- various power transistors can be used as the switching elements constituting the circuit for generating the alternating power.
- the full bridge combined resonance in which the resonance circuit is connected to the resonance point including the primary coil L1 at the midpoint position of the full bridge circuit 11 by the switching element.
- the circuit 10 was configured.
- the resonance circuit 10 is not limited to this, and may have other circuit configurations including a switching element and a primary coil L1 electrically connected to the switching element.
- the resonant circuit 10 may induce alternating power in the primary coil L1 using a single switching element instead of the full bridge circuit 11.
- the resonance circuit including the primary coil L1 and the primary side control device 13 are mounted on a charger, and the secondary coil L2 and the secondary coil The side control device 24 is mounted on a portable device.
- the resonance circuit including the primary coil L1 and the mounting target of the primary side control device 13 or the mounting target of the secondary coil L2 and the secondary side control device 24 are limited to these chargers and portable devices. I can't.
- the primary coil L1 and the primary coil L1 are modulated through the modulation of the alternating power induced in the primary coil L1 and / or through the modulation of the alternating power induced in the secondary coil L2.
- the present invention can be applied as long as it is intended to transmit various information to and from the secondary coil L2.
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Abstract
Description
以下、本発明にかかる非接触電力伝送装置を具体化した第1の実施の形態について図1及び図2を参照して説明する。この実施の形態の装置は、電源(負荷)としての2次電池を備えたデジタルカメラ、シェーバ、ノート型パーソナルコンピュータ等の携帯機器と、この携帯機器の2次電池に非接触で電力を供給する充電器とを有している。
(1)1次コイルL1から2次コイルL2への情報の伝達を、フルブリッジ複合共振回路10の抵抗値の変化に応じて変化する1次コイルL1及び2次コイルL2に各々誘起される交番電力の振幅の変化に基づき行うこととした。このため、1次コイルL1から2次コイルL2への情報の伝達を行う上で、各スイッチング素子FET1~FET4のオン/オフ制御を通じた電力伝送と1次コイルL1から2次コイルL2への情報の伝達とを同時に行うことができるようになる。これにより、非接触にて電力伝送を行うにあたり、より簡易な構成のもとに1次コイルL1と2次コイルL2との間での情報の伝達を実現することができるようになるとともに、上記交番電力の伝送及び情報の伝達にかかる制御も容易となる。
以下、本発明にかかる非接触電力伝送装置の第2の実施の形態について図3~図5を参照して説明する。なお、この第2の実施の形態は、フルブリッジ複合共振回路10の抵抗値の変更を、各スイッチング素子FET1~FET4のオン時に導通状態となるトランジスタ素子の2つの電流端子間の抵抗値(オン抵抗の値)の変更として行うものであり、その基本的な構成は先の第1の実施の形態と共通になっている。よって、それら各要素についての重複する説明は割愛する。
すなわち、この図3に示すように、第2の実施の形態の非接触電力伝送装置では、先の開閉器SW1~SW4及び上記抵抗素子R7~R10が割愛されている。そして、各スイッチング素子FET1~FET4に印加される制御電圧としてのゲート電圧の電圧値が、充電器側から携帯機器側に伝達すべき情報に基づき1次側制御装置13によって調整されることにより、それらスイッチング素子のオン抵抗の値が変更され、フルブリッジ複合共振回路10の抵抗値が変更される。図4は、こうした各スイッチング素子FET1~FET4のオン抵抗の特性例を示す。
なお、上記各実施の形態は、以下のような形態をもって実施することもできる。
・上記各実施の形態では、充電器から携帯機器へ、すなわち1次コイルL1から2次コイルL2へ充電器ID等の情報を伝達する場合についてのみ言及した。しかし、図1あるいは図3に例示した装置においては、
(a)携帯機器が更に、上記2次コイルL2に誘起される交番電力(電圧)の振幅を2次側制御装置24からの指令のもとに変調することのできる回路を備えてもよく、
(b)充電器が更に、2次コイルL2での交番電力(電圧)の振幅(変調された振幅)の変化を抽出する回路を備えるとともに、1次側制御装置13が、この抽出された交番電力(電圧)の振幅変化から上記携帯機器側で変調された情報を復調する機能を備えてもよい。
すなわち図6に示すように、ステップS101において充電器に携帯機器が設置されると、上記2次側制御装置24を起動させるための電力が1次コイルL1と2次コイルL2との電磁結合を通じて2次側回路20に送電される(ステップS102)。
Claims (10)
- 非接触電力伝送装置であって、
スイッチング素子と、該スイッチング素子に電気的に接続された1次コイルとを含む共振回路であって、前記スイッチング素子のスイッチング動作を通じて、該共振回路の抵抗値に応じた交番電力を前記1次コイルに誘起させる共振回路と、
前記1次コイルに発生した交番磁束と交差する位置で前記交番電力を前記1次コイルから非接触で受電する2次コイルと、
前記1次コイルに前記交番電力が誘起されるように前記スイッチング素子のオン/オフ制御を行うとともに、前記2次コイルに伝達すべき情報に基づいて前記共振回路の抵抗値を変更することにより、前記1次コイルに誘起される交番電力の振幅を変調する1次側制御装置と、
前記1次コイルでの交番電力の振幅の変化に応じて前記2次コイルに受電された交番電力の振幅の変化から、前記2次コイルに伝達された前記情報を復調する2次側制御装置と
を備える非接触電力伝送装置。 - 前記共振回路は、複数のスイッチング素子によるフルブリッジ回路と、該フルブリッジ回路の中点位置に電気的に接続され、前記1次コイルを含む共振部とからなるフルブリッジ複合共振回路であり、前記1次側制御装置は、前記フルブリッジ複合共振回路の抵抗値を変更することにより、前記1次コイルに誘起される交番電力の振幅を変調する、請求項1に記載の非接触電力伝送装置。
- 請求項2に記載の非接触電力伝送装置において、
前記1次コイルを含む共振部と前記フルブリッジ回路の各スイッチング素子との間には、所定の抵抗値を有する抵抗素子と開閉器との並列回路が電気的に接続されており、前記1次側制御装置は、各開閉器の開閉制御を通じて前記フルブリッジ複合共振回路の抵抗値を変更する、非接触電力伝送装置。 - 請求項2に記載の非接触電力伝送装置において、
前記フルブリッジ回路の各スイッチング素子は、可変オン抵抗を有するように構成されており、前記1次側制御装置は、各スイッチング素子のオン抵抗の値を変えることで前記フルブリッジ複合共振回路の抵抗値を変更する、非接触電力伝送装置。 - 前記1次側制御装置は、各スイッチング素子に印加される制御電圧の電圧値を変更することで前記各スイッチング素子のオン抵抗の値を変更する、請求項4に記載の非接触電力伝送装置。
- 前記1次側制御装置と前記各スイッチング素子の制御電圧印加端子との間に挿入される可変抵抗回路をさらに備えており、該可変抵抗回路は、直列もしくは並列接続された複数の抵抗素子と、それら抵抗素子の合成抵抗値を可変とする1つ以上の開閉器とを含み、前記1次側制御装置は、各可変抵抗回路の開閉器の開閉制御を通じて、前記スイッチング素子に印加される制御電圧の電圧値を変更する、請求項5に記載の非接触電力伝送装置。
- 前記スイッチング素子が電界効果トランジスタからなる、請求項1~6のいずれか一項に記載の非接触電力伝送装置。
- 前記1次コイルを含む共振回路及び前記1次側制御装置は充電器に搭載されており、
前記2次コイル及び前記2次側制御装置は2次電池を含む携帯機器に搭載されており、
前記充電器により非接触にて前記携帯機器の2次電池が充電される、請求項1~7のいずれか一項に記載の非接触電力伝送装置。 - 前記2次側制御装置は、前記復調された情報に基づき、前記充電器の規格が前記携帯機器の規格に適合するか否かを判断し、該充電器の規格が該携帯機器の規格に適合することを条件に、前記2次コイルを介した前記2次電池への充電を許可する、請求項8に記載の非接触電力伝送装置。
- 1次コイルに誘起された電力を非接触で2次コイルに送信するための送電回路であって、
スイッチング素子と、該スイッチング素子に電気的に接続された前記1次コイルとを含む共振回路であって、前記スイッチング素子のスイッチング動作を通じて、該共振回路の抵抗値に応じた交番電力を前記1次コイルに誘起させる共振回路と、
前記1次コイルに前記交番電力が誘起されるように前記スイッチング素子のオン/オフ制御を行うとともに、前記2次コイルに伝達すべき情報に基づいて前記共振回路の抵抗値を変更することにより、前記1次コイルに誘起される交番電力の振幅を変調する1次側制御装置と
を備える送電回路。
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CA2777582A CA2777582A1 (en) | 2009-11-24 | 2010-11-16 | Non-contact power transmission apparatus |
EP10833101A EP2506394A1 (en) | 2009-11-24 | 2010-11-16 | Non-contact power transmission apparatus |
CN2010800497673A CN102754304A (zh) | 2009-11-24 | 2010-11-16 | 非接触式输电设备 |
US13/502,447 US20120201054A1 (en) | 2009-11-24 | 2010-11-16 | Non-contact power transmission apparatus |
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KR20170043764A (ko) * | 2015-10-14 | 2017-04-24 | 엘지이노텍 주식회사 | 멀티 코일 무선 충전 방법 및 그를 위한 장치 및 시스템 |
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EP2506394A1 (en) | 2012-10-03 |
CA2777582A1 (en) | 2011-06-03 |
KR20120068907A (ko) | 2012-06-27 |
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