Control method for non-contact electric energy transmission
A control method and technology of electric energy transmission, applied in the direction of conversion equipment with intermediate conversion to AC, can solve the problems of transmission power and transmission efficiency reduction, natural resonance frequency shift of resonant circuit, etc., and achieve the effect of ensuring separability
Inactive Publication Date: 2011-04-06
TIANJING UNIV OF TECH & EDUCATION
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide an adaptive resonance control method for non-contact power transmission, which solves the problem that the natural resonance frequency of the resonance circuit is shifted due to the difference in compensation capacitance and the change of the load, resulting in transmission power and Problems such as rapid reduction in transmission efficiency
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[0010] Specific embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.
[0011] Such as figure 1 As shown, the figure is a schematic diagram of the adaptive resonance control of the non-contact power transmission system based on the phase-locked loop. The detection circuit detects the current signal of the primary coil and converts it into an input signal that meets the control circuit standard; the phase compensation link is used to compensate the time delay caused by the detection circuit; the phase detector compares the phase of the detected current signal with the voltage-controlled oscillator The phase of the output signal is compared to generate an error voltage U corresponding to the phase difference between the two signals d (t); the loop filter, on the one hand, uses its own low-pass characteristics to filter out the error voltage U d The high-frequency components and noise in (t) ens...
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The invention discloses a control method for non-contact electric energy transmission. In the method, a phase difference is obtained by detecting and calculating the output voltage and current of a non-contact electric energy transmission system inversion mechanism, and input into a PI regulator and an oscillation link to adjust a drive frequency of an inverter; and after a transient process, the phase difference between the inversion output voltage and current is zero so as to realize adaptive resonance control of a circuit. Through the invention, only the output voltage and current of the inversion mechanism needs to be detected, the separability of a receiving mechanism and a sending mechanism of the system is guaranteed; the adaptive resonance control function is completely implemented by a hardware circuit without a complex control algorithm; the control method has adaptive control capability against load change and has adjustment function on the changes of all device parameters output after inversion; and the system is kept working in a resonant status so as to maximize the output power and the transmission efficiency and promote the practical progress of the non-contact electric energy transmission technology.
Description
technical field [0001] The invention belongs to the technical field of power electronics and relates to a non-contact power transmission system, in particular to a control method for the non-contact power transmission system. Background technique [0002] Within the scope of the literature searched by the science and technology novelty search, there are only two domestic literatures that discuss the problem of resonance control in the non-contact power transmission system. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an adaptive resonance control method for non-contact power transmission, which solves the problem that the natural resonance frequency of the resonance circuit is shifted due to the difference in compensation capacitance and the change of the load, resulting in transmission power and problems such as rapid reduction in transmission efficiency. [0004] In order to realize above-mentioned task, th...
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Inventor 李彬
Owner TIANJING UNIV OF TECH & EDUCATION