Resonant frequency control method and device for wireless energy transmission system
A technology of wireless energy transmission and resonant 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
Inactive Publication Date: 2017-09-26
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] figure 1 It is a structural schematic diagram of the device for wireless energy transmission 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 t...
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A wireless energy transmission system resonant frequency control method comprises detecting an output voltage and an output current of an excitation power supply connected to an emission loop; enabling working frequency of the excitation power supply and inherent frequency of the emission loop to scan and change in a first frequency region and a second frequency region respectively; recording the magnitude and frequency of each output current detected when the output voltage and the output current are in the same phase in the scanning process; selecting the frequency of the minimum output current of the recorded output current; and enabling the working frequency of the excitation power supply and inherent frequency of the emission loop to be same with the frequency of the minimum output current. The method only takes control measures at the transmitting terminal of the system, and the working frequency of the excitation power supply and the inherent frequency of the emission loop are allowed to scan and change, and the inherent frequency of a reception loop is tracked dynamically, so that the whole system is allowed to be in a resonance working state.
Description
technical field [0001] The present invention relates to the technical field of wireless energy transmission, in particular to a method for controlling a resonant frequency of a wireless energy transmission system and a device for wireless energy transmission. 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 e...
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IPC IPC(8): H02J50/12
CPCH02J50/12
Inventor 任文华
Owner ZHEJIANG POLICE COLLEGE