igbt drive circuit soft switch device with short circuit protection

A driving circuit and short-circuit protection technology, applied in overload protection devices, electronic switches, output power conversion devices, etc. The effect of preventing damage to the device and improving the switching performance of the IGBT

Active Publication Date: 2020-10-02
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the IGBT switching characteristics, a larger value gate resistor can effectively control the collector voltage and current spikes and prevent the latching effect, but a larger value resistor will slow down the gate charge and discharge rate, prolong the IGBT turn-on and turn-off time, Increase switching loss; on the contrary, using a smaller gate resistance will lead to excessive collector voltage and current spikes, but it can speed up the gate charge and discharge rate, increase the switching speed, and reduce switching loss
In addition, the existing drive circuit cannot monitor and solve the IGBT short-circuit situation well, resulting in low switching performance, short service life, short-circuit fault cannot be effectively and accurately monitored, and the reliability of the existing IGBT drive circuit is not high.

Method used

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  • igbt drive circuit soft switch device with short circuit protection
  • igbt drive circuit soft switch device with short circuit protection
  • igbt drive circuit soft switch device with short circuit protection

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] refer to figure 1 , The IGBT drive circuit soft switching device with short circuit protection of the present invention includes a drive control module A01, a drive power module A02, a voltage comparison module A03, a switch circuit module A04 and an IGBT chip module A05.

[0030]The output terminal of the drive control module A01 is connected to the input terminal of the drive power module A02, and the drive control module A01 is used to provide the drive power module A02 with a PWM pulse signal, and control the switching on and off of the switch tube in the drive power module A02 through the PWM pulse signal broken;

[0031] The output terminal of the driving power module A02 is connected to the input terminal of the switching circuit module A04, and the driving power module A02 outputs the on or off voltage to the switching circuit module A04 and p...

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PUM

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Abstract

The invention discloses an IGBT drive circuit soft switching device with short circuit protection, which comprises a drive control module (A01), a drive power module (A02), a voltage comparison module(A03), a switching circuit module (A04) and an IGBT chip module (A05). The induced electromotive force on the emitter parasitic inductor of the IGBT chip module is used as a feedback signal to control connection of resistors with different resistance values in different stages of turn-on and turn-off processes to realize IGBT soft switching, whether short circuit happens to the turn-off process is judged through the feedback signal, and the IGBT is protected by an active clamping technology.

Description

technical field [0001] The invention relates to integrated electronic circuit technology, in particular to a soft switching device for an IGBT drive circuit with short-circuit protection. Background technique [0002] Insulated Gate Bipolar Transistor (IGBT) is a new type of device composed of an insulated gate field effect transistor (MOS) and a bipolar transistor (BJT). It effectively combines the advantages of both and is widely used. In traditional and emerging fields such as the automotive industry, high-speed railway, and electrical fields. The driving circuit affects the working performance of the IGBT module. It can effectively control the IGBT switching time, reduce the switching loss, suppress the voltage and current spikes, prevent the latching effect, and monitor and monitor various faults that the IGBT may encounter during the working process. protection and ensure that they work in a safe working area. In the existing IGBT driving circuit, a fixed-value gate ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02M1/08G01R31/52G01R1/36G01R1/30H03K17/082H03K17/567
CPCG01R1/30G01R1/36H02M1/08H03K17/0826H03K17/567Y02B70/10
Inventor何怡刚王建鑫李志刚袁伟博阮义李晨晨
OwnerHEFEI UNIV OF TECH