IGBT (Insulated Gate Bipolar Translator) driving circuit and motor controller

A drive circuit, bridge drive circuit technology, applied in the direction of circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve problems such as inability to take into account cost and clamping effect, and achieve Reduce the risk of overvoltage, delay the turn-off time, and the effect of low device cost

Pending Publication Date: 2021-10-12
GAC AION NEW ENERGY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide an IGBT drive circuit and a motor controller to solve the pr

Method used

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  • IGBT (Insulated Gate Bipolar Translator) driving circuit and motor controller
  • IGBT (Insulated Gate Bipolar Translator) driving circuit and motor controller
  • IGBT (Insulated Gate Bipolar Translator) driving circuit and motor controller

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] An embodiment of the present invention provides an IGBT drive circuit. like image 3As shown, the IGBT drive circuit includes the positive busbar P-bus, the negative busbar N-bus, the output busbar O-bus, the upper bridge IGBT tube Q21 and the lower bridge IGBT tube Q22, and the upper bridge IGBT tube Q21 is set on the positive busbar Between the P-bus and the output busbar O-bus, the lower bridge IGBT tube Q22 is arranged between the negative ...

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PUM

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Abstract

The invention discloses an IGBT (Insulated Gate Bipolar Translator) driving circuit and a motor controller. The IGBT driving circuit comprises a positive busbar, a negative busbar, an output busbar, an upper bridge IGBT tube and a lower bridge IGBT tube, the upper bridge IGBT tube is arranged between the positive busbar and the output busbar, the lower bridge IGBT tube is arranged between the negative busbar and the output busbar, the IGBT driving circuit further comprises a first overvoltage protection circuit and a second overvoltage protection circuit, the first overvoltage protection circuit is connected with the output busbar and the upper bridge IGBT tube, the upper-bridge IGBT charging module is used for charging a gate capacitor of the upper-bridge IGBT according to the upper-bridge induced voltage between the output busbar and the upper-bridge IGBT; and the second overvoltage protection circuit is connected with the negative busbar and the lower bridge IGBT tube and is used for charging the gate capacitor of the lower bridge IGBT tube according to the lower bridge induced voltage between the negative busbar and the lower bridge IGBT tube. The IGBT driving circuit mainly utilizes the induced voltage generated by the stray inductance of the busbar to delay the turn-off time of the IGBT tube, so as to reduce the potential overvoltage risk of the IGBT tube at the turn-off moment, effectively protect the IGBT tube, ensure the clamping effect, and have low device cost.

Description

technical field [0001] The invention relates to the technical field of automotive electronic design, in particular to an IGBT drive circuit and a motor controller. Background technique [0002] The popularization of new energy vehicles is the theme of the current development of the automotive industry. As the core component of the motor controller, its functional safety design has received more and more attention. The IGBT driver chip is the core device of the motor controller, and generally has its own desaturation overcurrent protection function, but in the case of overvoltage, an additional overvoltage protection circuit is generally required to achieve overvoltage protection. Due to the stray inductance between the collector (hereinafter referred to as C pole) and the emitter (hereinafter referred to as E pole) of the IGBT, the rapidly changing current at the moment the IGBT is turned off generates an induced voltage, which is superimposed on the bus voltage terminal, th...

Claims

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Application Information

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IPC IPC(8): H02H9/04
CPCH02H9/045
Inventor 梁文远蔡仕基赵小坤
Owner GAC AION NEW ENERGY AUTOMOBILE CO LTD
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