Secondary side parameter design method adaptive to any primary side series compensation WPT system

Abstract

The invention discloses a secondary side parameter design method adaptive to any primary side series compensation WPT system, which can adapt to any power supply end adopting primary side series compensation, adjust capacitance values of a secondary side coil and a secondary side series compensation capacitor to realize any constant-voltage output required by a load under the condition that a primary side structure and parameters are not changed, and meanwhile, the capacitance value of the secondary side parallel compensation capacitor is adjusted to enable input impedance to be pure resistive, reactive power in the system is approximate to zero, soft switching of a switching device is achieved, and the problem that in the prior art, constant-voltage output and input ZPA designated by a load and soft switching of the switching device cannot be achieved at the same time under the condition that all parameters of a primary side, namely a power supply end, cannot be adjusted is solved.

Description

technical field [0001] The invention relates to the field of wireless power transmission, in particular to a secondary side parameter design method for adapting any primary side series compensation WPT system. Background technique [0002] Inductive wireless power transfer (Wireless Power Transfer, WPT) technology realizes the power transmission between the primary side power supply end and the secondary side power receiving end through the high-frequency magnetic field coupling between the primary and secondary side coils of the non-contact transformer, and the power supply end and the power receiving end There is no need for mechanical and electrical connections between terminals, and flexible charging of "put it down and charge it away - take it away and use it" can be realized. It can be used in the charging field of mobile phones, watches, earphones, tablet computers, Internet of Things IoT, even drones, and household robots. It has broad application prospects. [0003...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the existing technical solutions, to provide a secondary side parameter design method for any primary side series compensation WPT system, which can adapt to any primary side using series compensation power supply end, in the primary side structure and parameters Under the condition that both are unchanged, adjust the capacitance of the secondary side coil and the secondary side series compensation capacitor to achieve any constant voltage output required by the load. At the same time, adjust the capacitance of the secondary side parallel compensation capacitor to make the input impedance purely resistive. The reactive power is approximately zero and the soft switching of the switching device is realized, which solves the problem that the existing technical solutions cannot realize the constant voltage output specified by the load, the input ZPA and the switching device at the same time when the parameters of the primary side (power supply end) are not adjustable. soft switch

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