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Semi-controlled rectifier bridge soft switching circuit for wireless power transmission receiving system

A receiving system, semi-controlled rectification technology, applied in circuit devices, high-efficiency power electronic conversion, AC power input conversion to DC power output, etc., can solve the problem that there are few researches on soft switching methods of half-controlled rectifier bridges, and avoid increasing , cost reduction, fast response effect

Pending Publication Date: 2019-03-15
上海万暨电子科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are few researches on soft switching methods for this semi-controlled rectifier bridge.

Method used

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  • Semi-controlled rectifier bridge soft switching circuit for wireless power transmission receiving system
  • Semi-controlled rectifier bridge soft switching circuit for wireless power transmission receiving system
  • Semi-controlled rectifier bridge soft switching circuit for wireless power transmission receiving system

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Embodiment Construction

[0020] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0021] The description in this part is only for several typical embodiments, and the present invention is not limited to the scope of the description of the embodiments. The mutual replacement of the same or similar prior art means and some technical features in the embodiments is also within the scope of the description and protection of the present invention.

[0022] "Coupling" in the specification includes direct connection and indirect connection, such as connection through some active devices, passive devices or electrically conductive media.

[0023] Such as figure 1 As shown, this embodiment provides a half-controll...

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Abstract

The invention provides a semi-controlled rectifier bridge soft switching circuit for a wireless power transmission receiving system, and the circuit comprises a main power circuit coupled between a receiving coil and a load, and an auxiliary control circuit. The main power circuit includes a bus electrolytic capacitor Co, a resonant capacitor Cs, a switching tube Qs, and diodes D1, D2, and D3; andthe auxiliary control circuit includes an integrated operational amplifier, a comparator, a logic circuit, and an optocoupler. In normal operation, there is an induced voltage caused by the transmitting coil on the receiving coil. The time sequence of the negative voltages at the input side of a rectifier bridge can be detected by sampling resistor voltage dividing and isolated optocoupler conversion. A linear operational amplifier and the comparator are used to compare a desired voltage to an actual voltage to generate a PWM control signal. The AND operation of the control signal and a previous negative voltage signal is performed, and the outputted signal will ensure that the switching tube of a half-controlled rectifier bridge is turned on when a body diode is turned on, thereby realizing the soft switching function.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a soft switch control circuit with AC voltage detection, load voltage control and logic operation used in a wireless power transmission receiving system. Background technique [0002] Wireless power transmission system is an important part of the field of power electronics, and the research on wireless power transmission system is very extensive at present. [0003] For the adjustment and control of the voltage on the receiving side of the wireless power transmission system, researchers have proposed two types of control methods: the indirect control on the transmitting side and the direct control on the receiving side. The method of performing voltage control on the receiving side on the transmitting side has the problem of control delay due to communication and system inertia. Direct control on the receiving side allows for faster response times. At present, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/219H02J50/12
CPCH02J50/12H02M7/219H02M1/0058Y02B70/10
Inventor 杨国勋寇秋林姚辰
Owner 上海万暨电子科技有限公司
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