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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

Active Publication Date: 2019-11-08
XI AN JIAOTONG UNIV
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Problems solved by technology

However, since the two full-bridge converters both use PWM control, the full-bridge converters are all working in a hard switching state, and the switching loss is large; the adjustment of the duty cycle in PWM control requires the introduction of a communication system, which increases the system cost.

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

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are explanations rather than limitations of the present invention. The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as figure 1 As shown, the series compensation dual active wireless power transmission system consists of a primary circuit and a secondary circuit. The primary side circuit includes: a switch tube S 1 ~S 4 A primary side full bridge converter, a primary side sampling circuit, a primary side controller and a primary side drive circuit are formed. Among them, the secondary side circuit includes: by S 5 ~S 8 The secondary side full-bridge converter, the secondary side sampling circuit, the secondary side controller and the secondary side driving circuit are formed.

[0026] Structural block diagram of the control method of the series compensation dual active wireless power ...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02J3/18
CPCH02J3/1807H02J7/025Y02E40/30
Inventor 雷万钧刘奉华段国朝崔耀郑沛坤
Owner XI AN JIAOTONG UNIV
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