A control method of a series compensation dual active wireless power transmission system

A technology of wireless power transmission and series compensation, applied in reactive power compensation, reactive power adjustment/elimination/compensation, electrical components, etc., can solve the problems of large switching loss and increased system cost, so as to increase reliability and save costs Effect
CN106877522BActive Publication Date: 2019-11-08XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2019-11-08

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Abstract

The invention discloses a control method of a series compensation double active wireless power transmission system, which comprises the steps that a secondary side sampling circuit collects the phase of AC-side output current i2; a secondary side controller uses a zero-crossing point of the phase of the collected AC-side output current i2 to act as a time reference, adopts an operating mode of combining PLL control and PWM control, calculates a driving signal time sequence of a secondary side full-bridge converter, and realizes output voltage control under a soft switching condition; a primary side controller uses a zero-crossing point of the phase of collected AC-side input current i1, adopts a operating mode of combining PLL control and PWM control, adjusts the duty ratio D1 of a primary side full-bridge converter, enables the phase of the AC-side input current i1 to cross zero when a primary side switching tube is turned on, and realizes soft switching of switching device of the primary full-bridge converter.
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Description

Technical field:

[0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to a control method for a series compensation dual active wireless power transmission system. Background technique:

[0002] The existing series-compensated dual active wireless power transfer system consists of a primary-side full-bridge converter, a transmitter-side coil and its compensation capacitor, a secondary-side full-bridge converter, a receiver-side coil and its compensation capacitor, and its topology is as follows: figure 1 shown. The dual-active wireless power transmission system with series compensation can actively adjust the output voltage of the receiving side due to the active characteristics of both sides, which is suitable for applications with a large load variation range and has high efficiency. Due to its completely symmetrical characteristics, it is possible to realize two-way transmission of energy.

[0003] In terms of the...

Claims

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