CN102222967B - Self-adaptive wireless charging system - Google Patents
Self-adaptive wireless charging system Download PDFInfo
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- CN102222967B CN102222967B CN2011101638228A CN201110163822A CN102222967B CN 102222967 B CN102222967 B CN 102222967B CN 2011101638228 A CN2011101638228 A CN 2011101638228A CN 201110163822 A CN201110163822 A CN 201110163822A CN 102222967 B CN102222967 B CN 102222967B
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Abstract
The invention discloses a self-adaptive wireless charging system, comprising an alternating-current power supply, a load, an AC (alternating current)/DC (direct current) conversion module, a driving module, a driving coil, an emitting coil, a receiving coil, a load coil, a rectifying module, a receiving end impedance matching module and a feedback control module, wherein the alternating-current power supply is connected with the driving coil by the AC/DC conversion module, the driving module, the emitting end impedance matching module and the driving coil that are sequentially connected with one another; the driving coil is coupled with the emitting coil; the emitting coil can transfer energy to the receiving coil by magnetic resonance coupling; the receiving coil is coupled with the loadcoil; the load coil is connected with the load by the rectifier module and the receiving end impedance matching module that are connected with each other sequentially; and the receiving end impedancematching module is connected with the driving module by the feedback control module. The self-adaptive wireless charging system can control the transmitting power of the wireless power supply, can improve the stability and running efficiency of the system, can improve the power factor of the system by a power compensation unit, and can reduce energy loss.
Description
Technical field
The invention belongs to the wireless charging technical field, more specifically relate to a kind of self adaptation magnetic resonance wireless charging system, be applicable to the power supply needs of special occasions such as household electrical appliance, handheld mobile device, electric automobile, radio sensing network, medical science.
Background technology
Flourish along with new high-tech industries such as electric automobile, high ferro, radio sensing networks, and electronic equipment is in the application of more and more occasions, traditional wired supply power mode has exposed many limitations, and the power supply of storage battery formula has caused a large amount of wastings of resources and environmental pollution, the line loss of big electric current contact power supply own is with to plug line loss repeatedly serious, degree influences obviously with there was dampness in the air to be subjected to ambient temperature, and is easy to generate spark, and the reform of supply power mode is imperative.And conventional wireless supply power mode radiativity is strong, efficiency of transmission is low, transmission range is near, has limited the popularization of related application, can't control inefficiency to the transmitting power of wireless power in the prior art simultaneously.
Summary of the invention
The objective of the invention is to be the problem that exists at above prior art, a kind of adaptive wireless charging system is provided, can control the transmitting power of wireless power, also include the power supplementary units simultaneously, the power factor of raising system reduces the energy loss in electric wiring and the electric equipment.
To achieve these goals, the present invention is by the following technical solutions:
A kind of adaptive wireless charging system, comprise AC power, load, the AC/DC modular converter, driver module, the transmitting terminal impedance matching module, drive coil, transmitting coil, receiving coil, loading coil, rectification module, receiving-end impedance matching module and feedback control module, the AC/DC modular converter of AC power by connecting successively, driver module is connected with drive coil with the transmitting terminal impedance matching module, drive coil and transmitting coil are of coupled connections, transmitting coil communicates information to receiving coil by magnetic resonance, receiving coil and loading coil are of coupled connections, loading coil is connected with the receiving-end impedance matching module by rectification module, the output of receiving-end impedance matching module is connected with load, and is connected with driver module by feedback control module.
Aforesaid driver module comprises Class C power amplifier unit, first power compensating unit and the protected location that connects successively, and the Class C power amplifier unit is connected with feedback control module, AC/DC modular converter respectively, and protected location is connected with the transmitting terminal impedance matching module.
Aforesaid rectification module comprises second power compensating unit, rectification filtering unit and the voltage regulation unit that connects successively, and second power compensating unit is connected with loading coil, and voltage regulation unit is connected with the receiving-end impedance matching module.
Aforesaid feedback control module comprises energy collecting device, receiving terminal wireless transmit/receive units, transmitting terminal wireless transmit/receive units and the DDS signal generator that connects successively, energy collecting device is connected with the receiving-end impedance matching module, and the DDS signal generator is connected with driver module.
The present invention compared with prior art has the following advantages and effect:
1. by feedback the transmitting power of wireless power is controlled, improved the stability of a system and operational efficiency;
2. improve the power factor of system by power compensating unit, reduce the energy loss in electric wiring and the electric equipment.
3. adopt high Q value coil, reduce the excess loss in the circuit.
Description of drawings
Fig. 1 is a kind of principle schematic of adaptive wireless charging system;
Fig. 2 is the principle schematic of driver module among Fig. 1;
Fig. 3 is the principle schematic of rectification module among Fig. 1;
Fig. 4 is the principle schematic of feedback control module among Fig. 1.
Wherein: 1-AC power, 2-AC/DC modular converter, 3-driver module; 4-transmitting terminal impedance matching module, 5-rectification module, 6-receiving-end impedance matching module; the 7-load; the 8-feedback control module, 9-drive coil, 10-transmitting coil; the 11-receiving coil; the 12-loading coil, 301-Class C power amplifier unit, 302-first power compensating unit; the 303-protected location; 501-second power compensating unit, 502-rectification filtering unit, 503-voltage regulation unit; the 801-DDS signal generator; 802-receiving terminal wireless transmit/receive units, 803-transmitting terminal wireless transmit/receive units, 804-energy collecting device.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
Embodiment:
As shown in Figure 1, a kind of adaptive wireless charging system comprises AC power 1, load 7, AC/DC modular converter 2, driver module 3, transmitting terminal impedance matching module 4, drive coil 9, transmitting coil 10, receiving coil 11, loading coil 12, rectification module 5, receiving-end impedance matching module 6 and feedback control module 8.AC power 1 is connected with drive coil 9 by AC/DC modular converter 2, driver module 3 and the transmitting terminal impedance matching module 4 that connects successively, drive coil 9 is of coupled connections with transmitting coil 10, transmitting coil 10 communicates information to receiving coil 11 by magnetic resonance, receiving coil 11 is of coupled connections with loading coil 12, loading coil 12 is connected with receiving-end impedance matching module 6 by rectification module 5, the output of receiving-end impedance matching module 6 is connected with load 7, and is connected with driver module 3 by feedback control module 8.
AC/DC modular converter 2 converts the alternating voltage of AC power 1 output direct voltage to and outputs to driver module 3, driver module 3 becomes high-power sinusoidal signal with the dc voltage conversion of importing and outputs to the drive coil 9 of high Q value by transmitting terminal impedance matching module 4, the high-power sinusoidal signal that drive coil 9 will be imported outputs to transmitting coil 10 by the mode of coupling, transmitting coil 10 produces alternating magnetic field under the effect of the high-power sinusoidal signal of drive coil 9 inputs, transmitting coil 10 has identical resonance frequency with receiving coil 11, and in alternating magnetic field, produce magnetic resonance, the magnetic field of sensing is converted to the signal of telecommunication of interchange to receiving coil 11 and the loading coil 12 of high Q value by coupling outputs to rectification module 5, the signal of telecommunication of 5 pairs of inputs of rectification module carries out rectifying and wave-filtering and outputs to load 7 by receiving-end impedance matching module 6, the signal of 8 pairs of receiving terminal impedance matching module of feedback control module 6 output is sampled, and the duty of regulating the square wave that outputs to driver module 3 is recently controlled transmitting power.
As shown in Figure 2; driver module 3 comprises Class C power amplifier unit 301, first power compensating unit 302 and the protected location 303 that connects successively; Class C power amplifier unit 301 is connected with feedback control module 8, AC/DC modular converter 2 respectively, and protected location 303 is connected with transmitting terminal impedance matching module 4.
The direct voltage that Class C power amplifier unit 301 is exported AC/DC modular converter 2 by the square wave of feedback control module 8 outputs converts the square wave ac signal of fixed frequency to and outputs to first power compensating unit, 302, the first power compensating unit 302 and is connected with drive coil 9 by protected location 303.The first power compensating unit input signal is the square wave ac signal of fixed frequency, this signal can be controlled closing and opening of the first power compensating unit 302 interior switching components (MOSFET power tube), and by electric capacity and inductance realization vibration, be output as sine wave signal at last, frequency is identical with the square wave ac signal frequency, and waveform is sinusoidal wave.Protected location is made of comparator; the comparator input signal is high level under first power compensating unit 302 situation working properly; output is high level; when first power compensating unit 302 is short-circuited; the comparator input signal is zero, and output signal is low level, thereby closes the power switch pipe in first power compensating unit 302; open circuit is realized protection.
As shown in Figure 3, rectification module 5 comprises that second power compensating unit 501, rectification filtering unit 502 and voltage regulation unit 503, the second power compensating unit 501 that connect successively are connected with loading coil 12, and voltage regulation unit 503 is connected with receiving-end impedance matching module 6.
Second power compensating unit 501 is carried out power back-off with the signal of telecommunication of loading coil 12 inputs, induction reactance by regulating load coil 12, make reception voltage reach maximum, thereby reach the purpose of power back-off, the power factor of raising system reduces the energy loss in electric wiring and the electric equipment.Signal after second power compensating unit 501 will compensate outputs to rectification filtering unit 502.Rectification filtering unit 502 converts the signal of second power compensating unit 501 output to direct current, and carries out filtering and output to voltage regulation unit 503.Filtering does not have spike in order to make in the circuit voltage mild, and the filter function in the rectification filtering unit 502 can make the ripple of output signal less than 1%.The signal of 503 pairs of rectification filtering units of voltage regulation unit, 502 outputs carries out voltage stabilizing and handles and output to respectively receiving-end impedance matching module 6.
As shown in Figure 4, feedback control module 8 comprises energy collecting device 804, receiving terminal wireless transmit/receive units 802, transmitting terminal wireless transmit/receive units 803 and the DDS signal generator 801 that connects successively, energy collecting device 804 is connected with receiving-end impedance matching module 6, and DDS signal generator 801 is connected with driver module 3.
The signal of 804 pairs of receiving terminal impedance matching module of energy collecting device 6 output is sampled and by receiving terminal wireless transmit/receive units 802 and the transmitting terminal wireless transmit/receive units 803 that connects successively sampled signal is outputed to DDS signal generator 801, and DDS signal generator 801 is regulated the duty ratio of the square wave that outputs to driver module 3 according to sampled signal.When the signal that samples becomes big, the duty ratio of the square wave of output is reduced, thus stabilized frequency; On the contrary, when the signal that collects diminishes, the duty ratio of the square wave of output is increased.
Magnetic resonance wireless charging technology is to utilize two coils with same resonance frequency, at a distance of certain apart from the time because the magnetic field coupling produces resonance, carry out the energy transmission.Why being called " magnetic resonance ", is because it is alternating magnetic field that the media of energy exchange is carried out in the space, and the electromagnetic resonance of each coil is to be realized by the electric field of the magnetic field in the coil and distributed capacitance inductance.
Coil system of the present invention comprises four coils, is respectively drive coil 9, transmitting coil 10, receiving coil 11 and loading coil 12, as shown in Figure 1.Drive coil 9 and transmitting coil 10 couplings, receiving coil 11 and loading coil 12, transmitting coil 10 and receiving coil 11 depend on inner distributed inductance and distributed capacitance and reach resonance, inner distributed inductance and distributed capacitance have determined the natural resonance frequency of coil itself, when the resonance frequency of two coils equates, can reach resonance.Energy is coupled to transmitting coil 10 by drive coil 9, and transmitting coil 10 and receiving coil 11 produces magnetic resonance owing to have identical resonance frequency under the effect in magnetic field, and receiving coil 11 is realized the energy transmission with loading coil 12 by coupling.The efficient that energy transmits is relevant with resonance coil q Q.Transmitting coil 10 and receiving coil 11 outer drive coil 9 and the loading coil 12 of increasing the Q value respectively improve low reactance-resistance ratio and the low deficiency that is coupled in two coil systems, reduce the excess loss in the circuit.The simultaneity factor resonance frequency is more high, and the reception antenna size is more little, and transmission range is more far away.
AC power 1 can be alternating current 220V; AC/DC modular converter 2 is made up of rectifier diode DSEI06-12A; Transmitting terminal impedance matching module 4 and receiving-end impedance matching module 6 can adopt tunable capacitor; Drive coil 9, transmitting coil 10, receiving coil 11, loading coil 12 are the enamelled wire coiling, and inductance value is 10uH; Class C power amplifier unit 301 can adopt TLV3501; First power compensating unit 302 and second power compensating unit 501 can adopt IRF840; Voltage regulation unit 503 can adopt voltage stabilizing didoe; DDS signal generator 801 can adopt the crystal oscillator oscillating circuit, and 10M crystal oscillator frequency division is realized; Receiving terminal wireless transmit/receive units 802 and transmitting terminal wireless transmit/receive units 803 can adopt the RF2410 transceiving chip; Energy collecting device 804 can adopt sampling resistor PMR25.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (3)
1. adaptive wireless charging system, comprise AC power (1) and load (7), it is characterized in that: this adaptive wireless charging system also comprises AC/DC modular converter (2), driver module (3), transmitting terminal impedance matching module (4), drive coil (9), transmitting coil (10), receiving coil (11), loading coil (12), rectification module (5), receiving-end impedance matching module (6) and feedback control module (8), the AC/DC modular converter (2) of AC power (1) by connecting successively, driver module (3) is connected with drive coil (9) with transmitting terminal impedance matching module (4), drive coil (9) is of coupled connections with transmitting coil (10), transmitting coil (10) communicates information to receiving coil (11) by magnetic resonance, receiving coil (11) is of coupled connections with loading coil (12), loading coil (12) is connected with receiving-end impedance matching module (6) by rectification module (5), the output of receiving-end impedance matching module (6) is connected with load (7), and be connected with driver module (3) by feedback control module (8), feedback control module (8) comprises the energy collecting device (804) that connects successively, receiving terminal wireless transmit/receive units (802), transmitting terminal wireless transmit/receive units (803) and DDS signal generator (801), energy collecting device (804) is connected with receiving-end impedance matching module (6), and DDS signal generator (801) is connected with driver module (3).
2. a kind of adaptive wireless charging system according to claim 1; it is characterized in that: described driver module (3) comprises Class C power amplifier unit (301), first power compensating unit (302) and the protected location (303) that connects successively; Class C power amplifier unit (301) is connected with feedback control module (8), AC/DC modular converter (2) respectively, and protected location (303) is connected with transmitting terminal impedance matching module (4).
3. a kind of adaptive wireless charging system according to claim 1, it is characterized in that: described rectification module (5) comprises second power compensating unit (501), rectification filtering unit (502) and the voltage regulation unit (503) that connects successively, second power compensating unit (501) is connected with loading coil (12), and voltage regulation unit (503) is connected with receiving-end impedance matching module (6).
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| CN2011101638228A CN102222967B (en) | 2011-06-17 | 2011-06-17 | Self-adaptive wireless charging system |
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| CN2011101638228A CN102222967B (en) | 2011-06-17 | 2011-06-17 | Self-adaptive wireless charging system |
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| CN102222967A CN102222967A (en) | 2011-10-19 |
| CN102222967B true CN102222967B (en) | 2013-09-18 |
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| CN102780275A (en) * | 2012-08-03 | 2012-11-14 | 电子科技大学 | Magnetic resonance coupling wireless energy transmission system |
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| CN108683265A (en) * | 2018-07-16 | 2018-10-19 | 成都瑞德星无线技术有限公司 | A kind of wireless charging R-T unit of adaptive power control |
| CN108988505A (en) * | 2018-07-25 | 2018-12-11 | 天津工业大学 | A kind of high-power dynamic radio charging system of electric car |
| CN110943552A (en) * | 2018-09-25 | 2020-03-31 | 泰科电子(上海)有限公司 | Wireless power supply device and electrical equipment |
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| CN109148990B (en) | 2018-09-30 | 2020-12-01 | Oppo广东移动通信有限公司 | Wireless charging method, electronic equipment, wireless charging device and wireless charging system |
| CN109742863B (en) | 2018-12-27 | 2023-06-20 | 华为技术有限公司 | Receiving end, transmitting end of wireless charging system and wireless charging system |
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