Compensation circuit, commutation cell and power converter controlling turn-on and turn-off of a power electronic switch

A power electronic switch and compensation circuit technology, applied in output power conversion devices, electronic switches, conversion of DC power input to DC power output, etc., can solve problems such as the end of life of power converters and the aging of parallelized power electronic switches.
CN105814780AActive Publication Date: 2016-07-27TM4 INC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TM4 INC
Publication Date
2016-07-27

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Abstract

The present disclosure relates to a compensation circuit for independently controlling turn-on and turn-off of a power electronic switch through a gate driver. The compensation circuit includes a circuit path sampling a first portion of a voltage induced across an inductance of the power electronic switch at turn-on. Another circuit path samples a second portion of the voltage induced across the inductance of the power electronic switch at turn-off. The compensation circuit further includes a gate driver reference connection configured to respectively supply the sampled portions of the voltage during turn-on and turn-off of the power electronic switch. A compensation circuit controlling a first power electronic switch in parallel with a second power electronic switch, a commutation cell and a power converter having a pair of parallel legs, in which each power electronic switch is provided with the compensation circuit, are also disclosed.
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Description

technical field

[0001] This disclosure relates to the field of power electronics. More specifically, the present disclosure relates to a compensation circuit, a commutation unit, and a power converter that control switching on and off of a power electronic switch. Background technique

[0002] Rectification units are commonly used in electronic systems that need to convert voltage sources, including DC-DC converters and DC-AC converters commonly known as inverters. In the case of limited space allowed for power converter circuits such as those used in electrical and / or electrical hybrid automation applications, and given the high cost of semiconductors, the integration of these rectification units demand increased.

[0003] One known way of reducing the space occupied by semiconductors in power converter circuits is to increase their efficiency, thereby allowing the size of their cooling surfaces to be reduced.

[0004] Losses in power electronic switches that occur in co...

Claims

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