Control method of power converter circuit

Abstract

In the control method of the power converter circuit, a primary side independent control mode and a secondary side independent control mode are adopted to solve the problems of control stability and reliability caused by long time delay and the like of wireless communication in real-time information interaction, and avoid the problems of low electric energy conversion efficiency and low power density caused by a multi-stage circuit. For a primary side transmitting circuit, a phase shift angle alpha and a primary side dynamic compensation phase angle delta of an inverter are controlled, so thatpower transmission is adjusted, and the change of a coupling coefficient is adapted. For a secondary side receiving circuit, the phase shift angle beta of the rectifier and the phase difference phi between the input voltage and the input current of the rectifier are controlled, so that the equivalent load resistance is matched with the optimal load resistance, and the secondary side dynamic compensation phase angle rho is controlled, so that the reactance of the resonance network counteracts the equivalent load reactance, and the reactance of the secondary side impedance is zero. Through a primary side dynamic compensation phase angle delta and a secondary side dynamic compensation phase angle rho of the resonance network, primary side resonance capacitance and secondary side resonance capacitance are respectively adjusted, and disturbance of relative distance and offset between coils is counteracted.

Description

technical field [0001] The invention relates to power converter technology, in particular to a control method for a power converter circuit. Background technique [0002] With the wide application of low-power wireless power transmission technology such as mobile phone wireless charging, the application of wireless power transmission technology in medium and high power levels is also in-depth research and active attempts. However, the existing wireless power transmission technology still faces key technical bottlenecks such as low energy transmission efficiency, short distance, and poor offset resistance. [0003] In order to improve the energy transmission distance and efficiency, a technique of adding a resonant compensation network to the primary coil and the secondary coil in the power converter circuit to form a magnetic resonance is proposed. However, in the existing resonant compensation network, the compensation inductance in the composite compensation network LCC r...

AI Technical Summary

Problems solved by technology

[0006] In the power converter circuit, based on the dynamic compensation of series-series resonant network, the single-stage circuit topology of wireless power transmission with multiple control degrees of freedom can solve the problems of low efficiency, impedance matching and low power density of multi-stage DC / DC circuits. question

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