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Active protective circuit for protecting series operation of semi-conductor device

A series operation, source protection technology, applied in emergency protection circuit devices, electrical components, electronic switches and other directions, to achieve the effect of reducing loss, increasing function, and improving performance

Active Publication Date: 2009-07-08
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the reverse breakdown active clamp circuit, when the collector-gate voltage is lower than a certain level, the capacitor will reverse breakdown voltage limiter and discharge

Method used

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  • Active protective circuit for protecting series operation of semi-conductor device
  • Active protective circuit for protecting series operation of semi-conductor device
  • Active protective circuit for protecting series operation of semi-conductor device

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Experimental program
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Embodiment Construction

[0035] The specific technical scheme of the invention is described below. A type of converter that can be applied to the invented circuit is a three-phase voltage source self-commutated converter such as Picture 9 Shown is a three-phase bridge with six valve arms, where each valve includes a series of semiconductor devices. The bridge arm is connected to the three-phase AC power grid through the inductors La, Lb, and Lc, and the DC terminals P and N are connected to the capacitor C. Each valve arm in the inverter includes any number of components T 1 ……T N , And each component includes at least one semiconductor device power electronic device IGBT, this device is protected by the invented over-voltage protection device.

[0036] See Picture 10 It shows a power semiconductor module composed of a power electronic device IGBT device and an anti-parallel diode, which contains power devices that need to be protected from overvoltage. The power electronic device IGBT is controlled by ...

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PUM

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Abstract

The invention provides an active protection circuit for protecting the series operation of a semiconductor device, which can reduce the overvoltage influence in the switching transient process of a monotube or a serial device. The protection circuit is started when the voltage on the power semiconductor exceeds the level of the given voltage. The overvoltage protection device can be used for protecting the module including at least one power device, and a plurality of modules are possibly connected in series in a power electronic device to bear the voltage in the valves string together.

Description

Technical field [0001] The invention belongs to the field of circuits with semiconductor devices, and in particular relates to an active protection circuit for protecting semiconductor devices to operate in series. Background technique [0002] Current power semiconductor devices, such as Insulated Gate Bipolar Transistor (IGBT) and Metal Oxide Semiconductor Field Effect Transistor (MOSFET), etc., can only withstand a certain amount of voltage. If there are other factors in the circuit, the semiconductor device may have to withstand a large voltage overshoot when it is turned off. This voltage may exceed the safe working range of the device and cause damage to the device. In addition, if the breaking voltage is high in some occasions, semiconductor devices must be used in series. In this mode of use, due to the inconsistency of the device characteristics, the influence of the stray parameters of the main circuit, and the differences in the control circuit, etc., the voltage distr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/20H03K17/08H02M7/10
Inventor 庞辉贺之渊易荣李强罗湘滕乐天刘隽
Owner CHINA ELECTRIC POWER RES INST