Soft switching AC-DC Vienna converter topological structure and control method

A technology of topology structure and control method, applied in the direction of converting AC power input to DC power output, high-efficiency power electronic conversion, output power conversion device, etc. Complexity and other problems, to achieve the effect of solving the ringing problem and reducing the reverse recovery loss

Pending Publication Date: 2021-03-16
CHANGZHOU TIANMAN INTELLIGENT TECH
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  • Application Information

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Problems solved by technology

[0003] Existing converter circuits using active snubber circuits feature reduced current and voltage stress in addition to soft switching for switch-on and rectifier-off, however, the auxiliary switches of active snubber circuits have higher current stress and work under hard switching conditions. In the boost topology described in the prior art, bot

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  • Soft switching AC-DC Vienna converter topological structure and control method
  • Soft switching AC-DC Vienna converter topological structure and control method
  • Soft switching AC-DC Vienna converter topological structure and control method

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[0024] Example

[0025] The present invention provides a circuit that reduces the reverse recovery loss and switch loss of the rectifier diode with the semiconductor element by using an active buffer circuit in the Vienna rectifier circuit topology, which does not apply any additional voltage stress to the rectifier diode. And the circuit topology can be applied to high voltage high power delivery DC conversion systems.

[0026] Such as figure 1 Distance figure 1 For the circuit structure of the soft switch AC-DC Viec Vien, the active buffer is used, the active buffer reduces the reverse recovery loss of the rectifier diode, and the zero voltage switch of the semiconductor main switch is realized, and the active buffer circuit is from one auxiliary. Active switch and a buffer capacitor consist of a buffer inductance, by controlling the Di / D r rate of the rectifier diode, creates a soft switch condition for the semiconductor main switch and auxiliary active switch, and buffer i...

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Abstract

The invention relates to a soft switching AC-DC Vienna converter topological structure and a control method, and the structure comprises a first rectifier diode D1, a second rectifier diode D2, a first main switch S1, a second main switch S2, a first output DC link capacitor C01, and a second output DC link capacitor C01, and also comprises an active buffer circuit. The active snubber circuit comprises a snubber inductor LS, a first auxiliary active switch SS1, a first snubber capacitor CS1, a second auxiliary active switch SS2 and a second snubber capacitor CS2, and the snubber inductor LS isconnected with the negative electrode of a first rectifier diode D1 through the first auxiliary active switch SS1 and the first snubber capacitor CS1 in sequence, and is connected with the negative electrode of the second rectifier diode D2 through the second auxiliary active switch SS2 and the second buffer capacitor CS2 in sequence, and is grounded through a first main switch S1 and a second main switch S2 in sequence. Compared with the prior art, the invention has the advantages of reducing the reverse recovery loss of the rectifier diode, avoiding the ringing problem and the like.

Description

technical field [0001] The invention relates to circuit topology technology, in particular to a soft-switching AC-DC Vienna converter topology and control method. Background technique [0002] In the existing literature, there are many circuit topologies employing active and passive snubber circuits to generate soft switching conditions for semiconductor devices and rectifier diodes. These snubber circuits are used to limit the rate of change of the diode current and create soft switching conditions for the circuit's semiconductor components. [0003] Existing converter circuits using active snubber circuits feature reduced current and voltage stress in addition to soft switching for switch-on and rectifier-off, however, the auxiliary switches of active snubber circuits have higher current stress and work under hard switching conditions. In the boost topology described in the prior art, both the main switch and the auxiliary switch work under soft switching conditions. Howe...

Claims

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Application Information

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IPC IPC(8): H02M1/34H02M7/219H02M1/08
CPCH02M1/083H02M1/34H02M7/219Y02B70/10
Inventor 曼苏乐徐雅梅
Owner CHANGZHOU TIANMAN INTELLIGENT TECH
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