CN104124774A - Wireless electric power transmission method and system - Google Patents
Wireless electric power transmission method and system Download PDFInfo
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- CN104124774A CN104124774A CN201310157085.XA CN201310157085A CN104124774A CN 104124774 A CN104124774 A CN 104124774A CN 201310157085 A CN201310157085 A CN 201310157085A CN 104124774 A CN104124774 A CN 104124774A
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- frequency
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- carrier signal
- receiving terminal
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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
- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
Abstract
The invention discloses a wireless electric power transmission method and system. The method comprises the following steps: rectifying input commercial power into sinusoidal unidirectional pulse voltage of which the power frequency is doubled that of the commercial power through the wireless electric power emitting end; inverting the sinusoidal unidirectional pulse voltage to obtain a high-frequency carrier signal containing the sinusoidal unidirectional pulse voltage; controlling an emitting coil to generate electromagnetic wave according to the high-frequency carrier signal; picking up the electromagnetic wave through the wireless electric power receiving end and converting to obtain a high-frequency carrier signal; filtering the high-frequency carrier signal to obtain sinusoidal unidirectional pulse voltage of which the power frequency is doubled that of the commercial power; supplying the sinusoidal unidirectional voltage to load for supplying power. With the adoption of the method and system, the light and thin emitting end and receiving of the wireless electric energy transmission system are realized, and the cost is decreased.
Description
Technical field
The present invention relates to wireless power transmission field, relate in particular to a kind of wireless power transmission method and system.
Background technology
Wireless power transmission technology, is generally to adopt induction coupling electric energy transmission technology, be a kind of by electromagnetic coupled in contactless mode a new technology to load transfer energy.Radio energy transmission system is mainly divided into transmitting terminal and receiving terminal two large divisions, and transmitting terminal has been mainly conversion and the transmission of electric energy, and receiving terminal has been mainly picking up of energy and voltage stabilizing, is load supplying.The high frequency magnetic field that system excites by the high-frequency current in transmitting coil causes that in receiving terminal coil the noncontact of the Pattern completion energy of electromagnetic induction generation induced voltage transmits.
The low power wireless power transmission products such as electric toothbrush that at present occurred on the market wireless mobile phone charger, wireless charging.But also do not have the small household electrical appliance of employing wireless electric energy transmission technology to occur, one of reason is that a lot of small household electrical appliances itself need higher power, the radio energy receiver module volume satisfying condition is larger, cannot be assembled in small household electrical appliance, if strengthen small household electrical appliance volume, due to too heavy, the inconvenience that brings user to operate; And cost is higher, be unfavorable for marketing.
As shown in Figure 1, the transmitting terminal of existing radio energy transmission system is mostly the electromagnetic field emissions that adopts level and smooth DC inversion to become the interchange of high frequency and be translated into high frequency by transmitting coil, in order to suppress harmonic wave, improve the power factor (PF) of transmitting terminal, radio energy transmitting terminal need add PFC(Power Factor Correction: Active PFC) circuit, and as passive PFC or active PFC circuit.The volume that has increased like this transmitting terminal, cost is high, is not easy to make the thinning of product small-sized light.
Corresponding, as shown in Figure 2, radio energy receiving terminal is direct current by the high-frequency alternating current receiving by rectifying and wave-filtering, the alternating current (for example 220V/50Hz) that then direct current is converted into mains frequency by inverter circuit offers household appliances.
Because radio energy receiving terminal has added inverter circuit, receiving terminal for high-power wireless power transmission, its parts number multiplication, causes its Efficiency Decreasing, and it is large that power loss becomes, and inevitably need to increase fin, further increased the volume of receiving terminal, be not easy to make the thinning of product small-sized light, and cost has been high, be not easy to be applied in the small household appliances of finite volume, thereby more difficultly realize commercialization.
Summary of the invention
The invention provides a kind of wireless power transmission method and system, realized the lightening design of the circuit module of radio energy transmitting terminal and receiving terminal, reduced cost, solved the problem in the small household electrical appliance that wireless power transmission technology is applied to.
For reaching this object, the present invention by the following technical solutions:
A wireless power transmission method, comprising:
Radio energy transmitting terminal is the sinusoidal unidirectional pulse voltage of civil power power frequency (for example 50Hz or 60Hz) 2 frequencys multiplication by the commercial power rectification of input, by high-frequency inverter circuit, described sinusoidal unidirectional pulse voltage is carried out to inversion and obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, to control transmitting coil according to described high-frequency carrier signal, generate electromagnetic waves;
Radio energy receiving terminal picks up described electromagnetic wave and is converted to described high-frequency carrier signal, described high-frequency carrier signal is carried out to the sinusoidal unidirectional pulse voltage that filtering obtains civil power power frequency 2 frequencys multiplication, described sinusoidal unidirectional pulse voltage is offered to load, is load supplying.
Wherein, describedly by high-frequency inverter circuit, described sinusoidal unidirectional pulse voltage is carried out to inversion and obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, to generate electromagnetic waves and also to comprise according to described high-frequency carrier signal control transmitting coil: by the compensating circuit arranging in described transmitting terminal in advance, described high-frequency carrier signal is compensated, generate electromagnetic waves to control transmitting coil according to the described high-frequency carrier signal after compensation;
Described wireless power transmission method also comprises:
Voltage waveform on sampling transmitting coil the in real time switching frequency of the described high-frequency inverter circuit of adjusting, make the switching frequency of described high-frequency inverter circuit consistent with the frequency of the resonant network consisting of described compensating circuit and transmitting coil.
Wherein, described radio energy receiving terminal picks up described electromagnetic wave and is converted to described high-frequency carrier signal and also comprises: the power factor (PF) to receiving terminal compensates, the useful work watt level receiving to adjust receiving terminal, then be converted to described high-frequency carrier signal according to the electric energy after compensation.
Wherein, described described sinusoidal unidirectional pulse voltage is offered to load, after load supplying, also comprises:
The analog signal of protection when Real-time Collection radio energy receiving circuit is exported to the voltage, electric current of load and abnormal condition, be translated into digital signal, and the digital signal of the protection during by the voltage of described load, electric current and abnormal condition feeds back to transmitting terminal by wireless mode;
The signal of the protection of transmitting terminal during according to the voltage of described load, electric current and abnormal condition is adjusted its operating state;
The analog signal of protection during described abnormal condition comprises: overcurrent, overvoltage or excess temperature.
A radio energy transmission system, comprises transmitting terminal and receiving terminal, the electromagnetic wave that transmitting terminal produces, and receiving terminal picks up described electromagnetic wave and is converted into electric energy is load supplying, wherein, described transmitting terminal comprises:
The first rectification high-frequency filtration, for by the commercial power rectification of input being the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication,
High-frequency inverter circuit, be connected with control circuit with described the first rectification high-frequency filtration, for described sinusoidal unidirectional pulse voltage being carried out to inversion according to the control signal of control circuit, obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, to control according to described high-frequency carrier signal the electromagnetic wave that transmitting coil produces;
Described receiving terminal comprises: the second rectification high-frequency filtration, for the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage being converted to by electromagnetic wave is carried out to filtering, obtains the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication; Described sinusoidal unidirectional pulse voltage is offered to load, is load supplying.
Wherein, described transmitting terminal also comprises:
With the compensating circuit that described high-frequency inverter circuit is connected, it comprises a resonant capacitance, and described compensating circuit and transmitting coil connect and compose resonant network, for the described high-frequency carrier signal to high-frequency inverter circuit, compensates;
Coil temperature Acquisition Circuit and coil current voltage signal acquisition circuit, be connected with described control circuit respectively, for gathering temperature and the current and voltage signals of transmitting coil and determining whether to send corresponding guard signal to control circuit;
Described control circuit, also the voltage waveform for the transmitting coil that obtains according to sampling regulates the switching frequency of described high-frequency inverter circuit in real time, makes the switching frequency of described high-frequency inverter circuit and the frequency of resonant network consistent.
Wherein, described receiving terminal also comprises:
Pick up compensating circuit, be connected with described the second rectification high-frequency filtration with pick-up winding, and, the described compensating circuit that picks up compensating circuit and transmitting terminal forms a compensation topological structure, for the power factor (PF) of receiving terminal is compensated, the useful work watt level receiving to adjust receiving terminal, then be converted to described high-frequency carrier signal according to the electric energy after compensation;
Wherein, described in, pick up and in compensating circuit, comprise a resonant capacitance.
Wherein, described receiving terminal also comprises:
Load information Acquisition Circuit, for Real-time Collection load information; The analog signal of protection when described load information comprises the current signal, voltage signal of load and abnormal condition;
Voltage negative feedback, protection and A/D convertor circuit, be connected with described load information Acquisition Circuit, for the analog signal of load information being converted into the digital signal of load information; And,
Wireless signal transmission circuit, is connected with described voltage negative feedback, protection and A/D convertor circuit, for by the digital signal modulated of described load information to radio communication channel and launch;
Described transmitting terminal also comprises:
Wireless signal receiving circuit, is connected with described control circuit, for receiving the load information of receiving terminal feedback;
Described control circuit, also adjusts the operating state of transmitting terminal for the load information that receives according to wireless signal receiving circuit.
Wherein, described transmitting terminal also comprises:
EMI circuit, be connected with described coil temperature Acquisition Circuit with described control circuit, and it comprises a relay, when coil temperature reaches set point, direct control relay disconnects the input of electric energy, and the civil power of input enters described the first rectification high-frequency filtration by described EMI circuit.
Wherein, described transmitting terminal also comprises:
Standby wake up circuit, is connected with described control circuit, for when the load of receiving terminal being detected and remove, automatically or control transmitting terminal according to user's operational order and enter holding state.
Implement the embodiment of the present invention, there is following beneficial effect:
The embodiment of the present invention is by optimizing the circuit design scheme of radio energy transmission system, farthest reduced the volume of the circuit module of transmitting terminal and receiving terminal, realized the lightening design of the circuit module of transmitting terminal and receiving terminal, reduce costs, and can guarantee the work that small household electrical appliance can be reliable and stable, be beneficial to the industrialization of technology.
Accompanying drawing explanation
Fig. 1 is the structural representation of the transmitting terminal of existing radio energy transmission system.
Fig. 2 is the structural representation of the receiving terminal of existing radio energy transmission system.
Fig. 3 is the flow chart of an embodiment of a kind of wireless power transmission method of the present invention.
Fig. 4 is the structural representation of an embodiment of a kind of radio energy transmission system of the present invention.
Fig. 5 is the structural representation of the another embodiment of a kind of radio energy transmission system of the present invention
Embodiment
Below in conjunction with accompanying drawing and by embodiment, further illustrate technical scheme of the present invention.
Refer to Fig. 3, it is the flow chart of an embodiment of a kind of method that is applicable to small household appliances wireless power transmission of the present invention, comprises the steps S110-S120:
S110, radio energy transmitting terminal are the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication by the electric main rectification of input; And by the high-frequency inverter circuit of transmitting terminal, described sinusoidal unidirectional pulse voltage is carried out to inversion, obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage; According to described high-frequency carrier signal, control transmitting coil and produce corresponding electromagnetic wave.Wherein, because the waveform of described sinusoidal unidirectional pulse voltage is similar to the mark of McDonald, therefore also referred to as McDonald's ripple.
Because radio energy transmitting terminal and civil power join, in order to reduce the pollution of wireless power transmission product to mains by harmonics, therefore to improve the power factor (PF) of transmitting terminal.In the embodiment of the present invention, civil power industrial frequency AC is after rectifying and wave-filtering is McDonald's ripple, no longer need to become level and smooth direct current with jumbo low frequency filtering capacitor filtering, in every half period, in the bridge rectifier of transmitting terminal, always there is like this angle of flow of two diodes close to 180 degree, reduced the heavy current pulse in short time, electric current has been averaged in to the whole cycle, reduce harmonic wave, improved the power factor (PF) of transmitting terminal.
S120, radio energy receiving terminal pick up described electromagnetic wave and are converted to the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, and the current rectifying and wave filtering circuit by receiving terminal carries out to described high-frequency carrier signal the sinusoidal unidirectional pulse voltage that filtering obtains civil power power frequency 2 frequencys multiplication; The sinusoidal unidirectional pulse voltage of described civil power power frequency 2 frequencys multiplication is offered to load, is load supplying.
Because the supply power voltage of the high-frequency inverter circuit of transmitting terminal is McDonald's wave voltage of civil power power frequency 2 frequencys multiplication, so the voltage waveform of transmitting coil is the high-frequency carrier signal that is loaded with McDonald's wave voltage.Therefore the voltage waveform on the pick-up winding of receiving terminal also for be loaded with McDonald's wave voltage high-frequency carrier signal.The current rectifying and wave filtering circuit of process receiving terminal, by HFS filtering wherein, obtains McDonald's ripple of power frequency 2 frequencys multiplication.Take McDonald's ripple (for example frequency is 100Hz or 120Hz, and voltage effective value is 100V～240V, also can follow according to regulating by communications feedback the effective value of the McDonald's ripple) power supply of 2 overtones bands of power frequency to load again.
Test shows, the heating kitchen tools that McDonald's ripple of 2 overtones bands of the power frequency of the embodiment of the present invention exchanges current use and the impact of electronic kitchen tools are minimum, radio energy receiving terminal just can directly be powered to electrical equipment without inverter like this, cost-saving, and the Miniaturization Design that is conducive to radio energy receiving terminal, is conducive to wireless power transmission Technique Popularizing to be applied in small household electrical appliance.
Based on the above embodiment of the present invention, preferably, in described radio energy transmitting terminal, a compensating circuit is set in advance, wherein, described compensating circuit and pick up and respectively comprise a resonant capacitance in compensating circuit.Describedly by high-frequency inverter circuit, described sinusoidal unidirectional pulse voltage is carried out to inversion and obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, to control transmitting coil according to described high-frequency carrier signal, generate electromagnetic waves, wherein also comprise: by described compensating circuit, described high-frequency carrier signal is compensated, to control transmitting coil according to the described high-frequency carrier signal after compensation, generate electromagnetic waves.Specifically as: as described in compensating circuit and the transmitting coil of transmitting terminal form a resonant network, transmitting terminal is in the process of receiving terminal electric energy transmitting, the high-frequency inverter circuit by described transmitting terminal carries out inversion to described sinusoidal unidirectional pulse voltage, obtains the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage; After producing corresponding electromagnetic wave according to described high-frequency carrier signal control transmitting coil, voltage waveform on the transmitting coil also obtaining according to sampling regulates the switching frequency of described high-frequency inverter circuit in real time, so that the switching frequency of the high-frequency inverter circuit of transmitting terminal and the frequency of resonant network are consistent, make described resonant network for the power supply of its input, present the feature of real impedance.During concrete enforcement, can utilize software in advance the switching frequency of high-frequency inverter circuit to be set in to a fixed frequency (resonance frequency of this frequency when not considering the reflected umpedance of receiving terminal), when transmitting terminal detects receiving terminal and has loaded work piece, by the switching frequency of resonant network and high-frequency inverter circuit is followed the tracks of, and the voltage waveform on the transmitting coil obtaining according to sampling regulates the switching frequency of high-frequency inverter circuit in real time, make the switching frequency of high-frequency inverter and the frequency of resonant network consistent.Wherein, the mode of frequency-tracking comprises software or hardware implementation mode, as long as though which kind of mode can make the switching frequency of high-frequency inverter and the frequency of resonant network consistent, at this moment the induction reactance in resonant network and capacitive reactance cancelled out each other and reached for the power supply of its input, and resonant network presents the feature of real impedance.The electric current of input resonant network and voltage are with regard to the complete same-phase of energy like this, adding the voltage that is input to high-frequency inverter circuit is the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication, therefore the voltage homophase that input current is just inputted with civil power, resonant network is in quasi-resonance state, and the power factor (PF) of transmitting terminal reaches higher value.Realize transmitting terminal and do not needed to increase the object that extra pfc circuit can reach Active PFC, made like this smaller volume of radio energy transmitting terminal, cost.
Preferably, in the embodiment of the present invention, described radio energy receiving terminal picks up described electromagnetic wave and is converted to described high-frequency carrier signal and also comprises: the power factor (PF) to receiving terminal compensates, the useful work watt level receiving to adjust receiving terminal, then be converted to described high-frequency carrier signal according to the electric energy after compensation.As: in advance as described in arrange one in radio energy receiving terminal and pick up compensating circuit, by the described compensating circuit that picks up, the power factor (PF) of receiving terminal is compensated, the useful work watt level receiving to adjust receiving terminal, then be converted to described high-frequency carrier signal according to the electric energy after compensation; Wherein, described in pick up compensating circuit and described transmitting terminal compensating circuit form any one compensation topological structure of SS, SP, PP or PS (SS: transmitting terminal compensating circuit is connected with transmitting coil, receiving terminal compensating circuit is connected with pick-up winding; SP: transmitting terminal compensating circuit is connected with transmitting coil, receiving terminal compensating circuit is in parallel with pick-up winding; PP: transmitting terminal compensating circuit is in parallel with transmitting coil, receiving terminal compensating circuit is in parallel with pick-up winding; PS: transmitting terminal compensating circuit is in parallel with transmitting coil, receiving terminal compensating circuit is connected with pick-up winding).
Preferably, in the embodiment of the present invention, receiving terminal and transmitting terminal carry out real-time data communication, to transmitting terminal Real-time Feedback load information, make transmitting terminal can adjust accordingly operating state.Be specially: described receiving terminal offers load by the sinusoidal unidirectional pulse voltage of described civil power power frequency 2 frequencys multiplication; after load supplying; the analog signal (as signals such as overcurrent, overvoltage, excess temperatures) of also protecting when the voltage of Real-time Collection load, electric current and abnormal condition; be translated into digital signal, and the digital signal of protecting during by the voltage of described load, electric current and abnormal condition feeds back to receiving terminal by wireless mode.Transmitting terminal is adjusted the operating state of transmitting terminal according to the load information of receiving terminal feedback.
By the data communication of receiving terminal and transmitting terminal, the benefit reaching has: 1, the output voltage signal of radio energy receiving terminal is fed back to radio energy transmitting terminal, by the duty ratio of switching circuit or the output voltage that switching frequency is stablized radio energy receiving terminal in the high-frequency inverter of adjusting transmitting terminal; 2, by the guard signal of radio energy receiving terminal if the signal feedback such as overcurrent, overvoltage, excess temperature are to radio energy transmitting terminal, can control in time closing switch circuit, the operating state of interrupting radio energy transmitting terminal makes it in holding state or restarting mode; 3, radio energy transmitting terminal is identified the load of receiving terminal, only has the load of legal receiving terminal just can enter the state of delivery of electrical energy.
The method of the wireless power transmission based on the above embodiment of the present invention: adopt the voltage source of McDonald's ripple of civil power power frequency 2 frequencys multiplication to input to high-frequency inverter at transmitting terminal, form the high-frequency carrier signal of inversion on described McDonald ripple, and launched by the electromagnetic wave that transmitting coil is translated into high frequency, pick-up winding by receiving terminal picks up electromagnetic wave and is translated into electric energy, rectifying and wave-filtering obtains McDonald's ripple of civil power power frequency 2 frequencys multiplication again, supplies with electric appliance load and uses.And McDonald's wave voltage size of civil power power frequency 2 frequencys multiplication of output can be regulated and be reached voltage stabilization by feedback circuit, to guarantee the power quality of the load appliance of receiving terminal.Because transmitting terminal is without adding extra pfc circuit to carry out power factor adjustment, receiving terminal is without adding inverter circuit to carrying out the adjustment of output voltage, therefore, farthest reduced the volume of transmitting terminal and receiving terminal circuit module, realized the lightening design of transmitting terminal and receiving terminal circuit module, reduce costs, easy to utilize in the wireless power transmission field of small household appliances; Guarantee the work that small household electrical appliance can be reliable and stable simultaneously, be beneficial to the industrialization of technology.
Refer to Fig. 4, the present invention also provides a kind of embodiment that is applicable to the system of high-power wireless power transmission, described system comprises transmitting terminal 10 and receiving terminal 20, and transmitting terminal 10 converts electrical energy into electromagnetic wave, and receiving terminal 20 picks up electromagnetic wave and is converted into electric energy is load 30 power supplies; Wherein, described transmitting terminal 10 comprises:
The first rectification high-frequency filtration 101, for by the commercial power rectification of input being the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication.
In the embodiment of the present invention, civil power industrial frequency AC is after rectifying and wave-filtering is McDonald's ripple, no longer need to become level and smooth direct current with jumbo low frequency filtering capacitor filtering, in every half period, in the bridge rectifier of transmitting terminal, always there is like this angle of flow of two diodes close to 180 degree, reduced the heavy current pulse in short time, electric current has been averaged in to the whole cycle, reduce harmonic wave, improved the power factor (PF) of transmitting terminal.
High-frequency inverter circuit 102, be connected with control circuit 103 with described the first rectification high-frequency filtration 101, for described sinusoidal unidirectional pulse voltage being carried out to inversion according to the control signal of control circuit 103, obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, to control transmitting coil 104 according to described high-frequency carrier signal, produce corresponding electromagnetic wave.
Described receiving terminal 20 comprises: the second rectification high-frequency filtration 201, for after pick-up winding 204 picks up electromagnetic wave and is converted to the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, described high-frequency carrier signal is carried out to filtering, obtain the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication; And described sinusoidal unidirectional pulse voltage is offered to load 30, be load supplying.
Because the supply power voltage of the high-frequency inverter circuit 102 of transmitting terminal 10 is McDonald's wave voltage of civil power power frequency 2 frequencys multiplication, so the voltage waveform of transmitting coil 104 is the high-frequency carrier signal that is loaded with McDonald's wave voltage, the frequency of described high-frequency carrier signal is the switching frequency of high-frequency inverter circuit 102.Therefore the voltage waveform on the pick-up winding 204 of receiving terminal 20 also for be loaded with McDonald's wave voltage high-frequency carrier signal.The second current rectifying and wave filtering circuit 201 of process receiving terminal 20, by HFS filtering, obtains McDonald's ripple of power frequency 2 frequencys multiplication.With McDonald's ripple (effective value 220V also can follow according to regulating by communications feedback the effective value of McDonald's ripple) power supply of 2 overtones bands of power frequency to load 30.
Test shows, the heating kitchen tools that McDonald's ripple of 2 overtones bands of the power frequency of the embodiment of the present invention exchanges current use and the impact of electronic kitchen tools are minimum, radio energy receiving terminal just can directly be powered to electrical equipment without inverter like this, cost-saving, and the Miniaturization Design that is conducive to radio energy transmitting terminal and receiving terminal, is conducive to wireless power transmission Technique Popularizing to be applied in small household electrical appliance.
Preferably, refer to Fig. 5, Fig. 5 is the structural representation of another embodiment of a kind of system that is applicable to small household appliances wireless power transmission of the present invention, as shown in Figure 5, described system comprises transmitting terminal 10 and receiving terminal 20, the pick-up winding 204 of described receiving terminal 20 be positioned over transmitting terminal 10 transmitting coil 104 directly over, by picking up the magnetic field ripple that transmitting coil 104 produces and being converted into electric energy, the non-contact type electric energy of realizing transmitting terminal and receiving terminal transmits.Wherein, described transmitting terminal 10 comprises the first rectification high-frequency filtration 101, high-frequency inverter circuit 102, transmitting coil 104 and control circuit 103; Described receiving terminal 20 includes the second rectification high-frequency filtration 201 and pick-up winding 204, and wherein the function of concrete each several part please refer to described in an embodiment.And, described transmitting terminal 10 also comprises: compensating circuit 105, be connected with transmitting coil 104 with described high-frequency inverter circuit 102, wherein comprise a resonant capacitance, and described compensating circuit 105 connects and composes resonant network with transmitting coil 104, for the described high-frequency carrier signal to high-frequency inverter circuit, compensates; Also comprise coil temperature Acquisition Circuit 106 and coil current voltage signal acquisition circuit 107, be connected with described control circuit 103 respectively, for gathering temperature and the current and voltage signals of transmitting coil and determining whether to send corresponding guard signal to control circuit.
Preferably, described control circuit 103, also the voltage waveform for the transmitting coil that obtains according to sampling regulates the switching frequency of described high-frequency inverter circuit 102 in real time, make the switching frequency of described high-frequency inverter circuit 102 with consistent by the frequency of described resonant network, so that described resonant network presents the feature of real impedance for its input.At this moment the induction reactance in resonant network and capacitive reactance cancelled out each other, the electric current of input resonant network and voltage is the complete same-phase of energy just, adding the voltage that is input to high-frequency inverter circuit is the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication, therefore the voltage homophase that input current is just inputted with civil power, be resonant network in quasi-resonance state, the power factor (PF) of input reaches higher value.Having realized transmitting terminal does not need to increase the object that extra pfc circuit can reach Active PFC, makes the smaller volume of radio energy transmitting terminal, cost.
Continue to consult Fig. 5, in the present embodiment, described receiving terminal 20 also comprises: pick up compensating circuit 202, be connected with described the second rectification high-frequency filtration 201 with pick-up winding 204, and, the described compensating circuit 202 that picks up forms any one compensation topological structure (specifically referring to described in above-described embodiment) of SS, SP, PP or PS with the compensating circuit 105 of transmitting terminal, for the power factor of receiving terminal is compensated, the useful work watt level receiving to adjust receiving terminal, then be converted to described high-frequency carrier signal according to the electric energy after compensation; Wherein, described in, pick up and in compensating circuit 202, comprise a resonant capacitance.
Preferably, described receiving terminal 20 also comprises: load information Acquisition Circuit 203, for Real-time Collection load information; In the embodiment of the present invention, the analog signal of protection when described load information comprises the current signal, voltage signal of load and abnormal condition.Voltage negative feedback, protection and A/D convertor circuit 205, be connected with described load information Acquisition Circuit 203, for the analog signal of load information being converted into the digital signal of load information.Wireless signal transmission circuit 206, is connected with described voltage negative feedback, protection and A/D convertor circuit 205, for by the digital signal modulated of described load information to radio communication channel and launch.
Accordingly, described transmitting terminal 10 also comprises: wireless signal receiving circuit 108, is connected with described control circuit 103, for receiving the load information of receiving terminal feedback.Corresponding, described control circuit 103 is also adjusted the operating state of receiving terminal for the load information receiving according to wireless signal receiving circuit.
Preferably, described transmitting terminal 10 also comprises:
EMI circuit (the circuit of electromagnetic compatibility, inside comprise a relay) 109, be connected with described coil temperature Acquisition Circuit with described control circuit, when the temperature of described transmitting coil reaches set point, directly control the input that described relay disconnects electric energy, the civil power of input enters described the first rectification high-frequency filtration by described EMI circuit 109; By EMI circuit, can reduce the electromagnetic interference to utility grid.
Standby wake up circuit 110, is connected with described control circuit 103, for when the load of receiving terminal being detected and remove, automatically or control transmitting terminal according to user's operational order and enter holding state.
In addition, as shown in Figure 5, described transmitting terminal 10 also comprises: operation interface/button circuit 111, the input for user to the operational order of machine.
Described receiving terminal 20 also comprises: pick-up winding temperature collection circuit 207, for detection of the temperature of pick-up winding to determine whether the sending signal that carries out overheat protector.
By implementing the embodiment of the present invention, optimized the circuit design scheme of radio energy transmission system, farthest reduced the volume of the circuit module of transmitting terminal and receiving terminal, realized the lightening design of the circuit module of transmitting terminal and receiving terminal, reduce costs, and can guarantee the work that small household electrical appliance can be reliable and stable, be beneficial to the industrialization of technology.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a wireless power transmission method, is characterized in that, comprising:
Radio energy transmitting terminal is the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication by the commercial power rectification of input, by high-frequency inverter circuit, described sinusoidal unidirectional pulse voltage is carried out to inversion and obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, to control transmitting coil according to described high-frequency carrier signal, generate electromagnetic waves;
Radio energy receiving terminal picks up described electromagnetic wave and is converted to described high-frequency carrier signal, described high-frequency carrier signal is carried out to the sinusoidal unidirectional pulse voltage that filtering obtains civil power power frequency 2 frequencys multiplication, described sinusoidal unidirectional pulse voltage is offered to load, is load supplying, wherein
Described civil power power frequency is 50Hz or 60Hz.
2. wireless power transmission method as claimed in claim 1, it is characterized in that, describedly by high-frequency inverter circuit, described sinusoidal unidirectional pulse voltage is carried out to inversion and obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, to generate electromagnetic waves and also to comprise according to described high-frequency carrier signal control transmitting coil: by the compensating circuit arranging in described transmitting terminal in advance, described high-frequency carrier signal is compensated, generate electromagnetic waves to control transmitting coil according to the described high-frequency carrier signal after compensation;
Described wireless power transmission method also comprises:
Voltage waveform on sampling transmitting coil the in real time switching frequency of the described high-frequency inverter circuit of adjusting, make the switching frequency of described high-frequency inverter circuit consistent with the resonance frequency of the resonant network consisting of described compensating circuit and transmitting coil.
3. wireless power transmission method as claimed in claim 2, it is characterized in that, described radio energy receiving terminal picks up described electromagnetic wave and is converted to described high-frequency carrier signal and also comprises: the power factor to receiving terminal compensates, the useful work watt level receiving to adjust receiving terminal, then be converted to described high-frequency carrier signal according to the electric energy after compensation.
4. wireless power transmission method as claimed in claim 1, is characterized in that, described described sinusoidal unidirectional pulse voltage is offered to load, after load supplying, also comprises:
The analog signal of protecting when Real-time Collection radio energy receiving terminal is exported to the voltage, electric current of load and abnormal condition, be translated into digital signal, and the digital signal of protecting during by the voltage of described load, electric current and abnormal condition feeds back to transmitting terminal by wireless mode;
The digital signal of the protection of transmitting terminal during according to the voltage of described load, electric current and abnormal condition is adjusted its operating state;
The analog signal of protection during described abnormal condition comprises: overcurrent, overvoltage or excess temperature.
5. a radio energy transmission system, comprises transmitting terminal and receiving terminal, and transmitting terminal generates electromagnetic waves, and receiving terminal picks up described electromagnetic wave and is converted into electric energy is load supplying, it is characterized in that, described transmitting terminal comprises:
The first rectification high-frequency filtration, for by the commercial power rectification of input being the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication,
High-frequency inverter circuit, be connected with control circuit with described the first rectification high-frequency filtration, for described sinusoidal unidirectional pulse voltage being carried out to inversion according to the control signal of control circuit, obtain the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage, to control transmitting coil according to described high-frequency carrier signal, generate electromagnetic waves;
Described receiving terminal comprises: the second rectification high-frequency filtration, for the high-frequency carrier signal that comprises described sinusoidal unidirectional pulse voltage being converted to by electromagnetic wave is carried out to filtering, obtains the sinusoidal unidirectional pulse voltage of civil power power frequency 2 frequencys multiplication; Described sinusoidal unidirectional pulse voltage is offered to load, is load supplying, wherein
Described civil power power frequency is 50Hz or 60Hz.
6. radio energy transmission system according to claim 5, is characterized in that, described transmitting terminal also comprises:
With the compensating circuit that described high-frequency inverter circuit is connected, it comprises a resonant capacitance, and described compensating circuit and transmitting coil connect and compose resonant network, for the described high-frequency carrier signal to high-frequency inverter circuit, compensates;
Coil temperature Acquisition Circuit and coil current voltage signal acquisition circuit, be connected with described control circuit respectively, for gathering temperature and the current and voltage signals of transmitting coil and determining whether to send corresponding guard signal to control circuit;
Described control circuit, also the voltage waveform for the transmitting coil that obtains according to sampling regulates the switching frequency of described high-frequency inverter circuit in real time, makes the switching frequency of described high-frequency inverter circuit and the resonance frequency of resonant network consistent.
7. radio energy transmission system according to claim 6, is characterized in that, described receiving terminal also comprises:
Pick up compensating circuit, be connected with described the second rectification high-frequency filtration with pick-up winding, and, the described compensating circuit that picks up compensating circuit and transmitting terminal forms a compensation topological structure, for the power factor (PF) of receiving terminal is compensated, the useful work watt level receiving to adjust receiving terminal, then be converted to described high-frequency carrier signal according to the electric energy after compensation;
Wherein, described in, pick up and in compensating circuit, comprise a resonant capacitance.
8. radio energy transmission system according to claim 5, is characterized in that,
Described receiving terminal also comprises:
Load information Acquisition Circuit, for Real-time Collection load information; The analog signal of protection when described load information comprises the current signal, voltage signal of load and abnormal condition;
Voltage negative feedback, protection and A/D convertor circuit, be connected with described load information Acquisition Circuit, for the analog signal of load information being converted into the digital signal of load information; And,
Wireless signal transmission circuit, is connected with described voltage negative feedback, protection and A/D convertor circuit, for by the digital signal modulated of described load information to radio communication channel and launch;
Described transmitting terminal also comprises:
Wireless signal receiving circuit, is connected with described control circuit, for receiving the load information of receiving terminal feedback;
Described control circuit, also adjusts the operating state of transmitting terminal for the load information that receives according to wireless signal receiving circuit.
9. radio energy transmission system according to claim 6, is characterized in that, described transmitting terminal also comprises:
EMI circuit, be connected with described coil temperature Acquisition Circuit with described control circuit, and it comprises a relay, when the temperature of described transmitting coil reaches set point, directly control the input that described relay disconnects electric energy, the civil power of input enters described the first rectification high-frequency filtration by described EMI circuit.
10. radio energy transmission system according to claim 5, is characterized in that, described transmitting terminal also comprises:
Standby wake up circuit, is connected with described control circuit, for when the load of receiving terminal being detected and remove, automatically or control transmitting terminal according to user's operational order and enter holding state.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310157085.XA CN104124774B (en) | 2013-04-28 | 2013-04-28 | Wireless power transmission method and system |
| PCT/CN2013/085483 WO2014176875A1 (en) | 2013-04-28 | 2013-10-18 | Method and system fro wireless electric energy transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310157085.XA CN104124774B (en) | 2013-04-28 | 2013-04-28 | Wireless power transmission method and system |
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| CN104124774A true CN104124774A (en) | 2014-10-29 |
| CN104124774B CN104124774B (en) | 2018-04-20 |
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| CN201310157085.XA Active CN104124774B (en) | 2013-04-28 | 2013-04-28 | Wireless power transmission method and system |
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| WO (1) | WO2014176875A1 (en) |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110316347A1 (en) * | 2010-06-24 | 2011-12-29 | Advantest Corporation | Wireless power receiving apparatus |
| CN102916500A (en) * | 2012-10-24 | 2013-02-06 | 天津工业大学 | Wireless electric energy transmission device for multiple sensors |
| CN102916497A (en) * | 2012-09-29 | 2013-02-06 | 河南理工大学 | Safety socket for wireless electric energy transmission |
| CN102969776A (en) * | 2012-12-03 | 2013-03-13 | 中国科学院电工研究所 | Wireless charging device of electronic automobile |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013070535A (en) * | 2011-09-22 | 2013-04-18 | Hitachi Koki Co Ltd | Wireless power supply adaptable electric power supply apparatus, electric power tool, charger, and electrical machine |
-
2013
- 2013-04-28 CN CN201310157085.XA patent/CN104124774B/en active Active
- 2013-10-18 WO PCT/CN2013/085483 patent/WO2014176875A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110316347A1 (en) * | 2010-06-24 | 2011-12-29 | Advantest Corporation | Wireless power receiving apparatus |
| CN102916497A (en) * | 2012-09-29 | 2013-02-06 | 河南理工大学 | Safety socket for wireless electric energy transmission |
| CN102916500A (en) * | 2012-10-24 | 2013-02-06 | 天津工业大学 | Wireless electric energy transmission device for multiple sensors |
| CN102969776A (en) * | 2012-12-03 | 2013-03-13 | 中国科学院电工研究所 | Wireless charging device of electronic automobile |
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| WO2014176875A1 (en) | 2014-11-06 |
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