Wireless energy transmission device and method for controlling resonant frequency of the device
A technology of wireless energy transmission and natural frequency, applied in circuit devices, electrical components, etc., can solve the problems of difficult resonance state of the system and the decline of system transmission efficiency, and achieve the effect of high application value
Active Publication Date: 2017-12-15
ZHEJIANG POLICE COLLEGE
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Problems solved by technology
Since the transmitting loop and the receiving loop are susceptible to various interferences in the actual working environment, it is difficult for the entire system to work in a resonance state, and the detuning of the system will cause a sharp drop in the transmission efficiency of the system
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[0032] FIG. 1 is a schematic structural diagram of the wireless energy transmission device of the present invention, which is composed of a transmitting end and a receiving end. exist figure 1 , the transmitter consists of an excitation power supply , transmitting coil , emission capacitance and capacitance matrix The formed transmitting circuit and the control circuit mainly composed of a single-chip microcomputer control unit, a relay system and a detection circuit. Among them, the excitation power Includes DC power supply , by field effect tube and The half-bridge circuit, drive circuit and oscillator formed. The receiving end consists of a receiving coil , receiving capacitance and load formed receiving circuit.
[0033] exist figure 1 In, the detection circuit respectively detects the output voltage of the excitation power supply and output current , and then sent to the A / D converter for analog-to-digital conversion, and finally sent to the m...
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A wireless energy transmission apparatus is disclosed. The wireless energy transmission apparatus comprises a capacitance matrix, a detection circuit, a relay system, an oscillator and a single chip microcomputer control unit, wherein the detection circuit is used for detecting output voltage and output current of an excitation power supply; the single chip microcomputer control unit is set to be capable of controlling the oscillator to enable the working frequency of the excitation power supply to be subjected to scanning variation, capable of controlling the relay system to enable the inherent frequency of an launching loop to be subjected to scanning variation, capable of recording the amplitude and frequency of each output current when the output voltage and the output current are in the same phase, capable of selecting the frequency of the minimum output current from the recorded each output current, and capable of making the working frequency of the excitation power supply and the inherent frequency of the launching loop to be the same as the frequency of the minimum output current. The wireless energy transmission apparatus, by only setting the control apparatus in the emitting end, can make the working frequency of the excitation power supply and the inherent frequency of the launching loop to be subjected to the scanning variations and can dynamically trace the inherent frequency of a receiving loop, and the resonance operation of the overall system can be realized.
Description
technical field [0001] The present invention relates to the technical field of wireless energy transmission, in particular to a wireless energy transmission device and a method for controlling the resonant frequency of the device. Background technique [0002] Various electrical devices usually use wired connections to achieve energy transmission. Because the wireless transmission of energy has the characteristics of safety and convenience, realizing the wireless transmission of energy has always been a dream that people are eager to realize. In some special applications, such as underwater operations, medical implants, wireless networks and other occasions where it is inconvenient or impossible to use wires to provide energy, wireless energy transmission has a high application value. [0003] According to the principle of energy transmission, at present, the wireless energy transmission technology researched at home and abroad mainly includes electromagnetic wave energy tr...
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IPC IPC(8): H02J50/12
Inventor 刘强任文华
Owner ZHEJIANG POLICE COLLEGE