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IGBT driving protection system

A driving protection and driver technology, applied in the circuit field, can solve problems such as high cost, non-continuously adjustable voltage, and low precision, and achieve low cost, saving design investment, and good versatility

Inactive Publication Date: 2015-05-27
ANHUI XINLONG ELECTRICAL
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  • Application Information

AI Technical Summary

Problems solved by technology

The modified method has the following disadvantages: 1. Hybrid drive modules are commonly used for overcurrent protection. The critical voltage action value of the hybrid drive module itself is fixed, and there is a problem with IGBT coordination. The accuracy is not high. The drive module and IGBT are integrated. The voltage between the electrodes cannot be continuously adjusted
2. Overvoltage protection, using laminated busbars to reduce stray inductance, and adding some low-resistance and low-inductance decoupling capacitors on the entire line can also reduce line inductance, but the cost is high
3. For overheating protection, radiators are generally used for forced air cooling, which is costly

Method used

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Embodiment Construction

[0009] Below, referring to the accompanying drawings, through the description of the embodiments, the specific implementation of the present invention, such as the control system involved, the mutual connection relationship, and the implementation method, are further described in detail, so as to help those skilled in the art understand the present invention Have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions.

[0010] An IGBT drive protection system, the system includes an IGBT driver and an IGBT fault feedback module, the IGBT driver includes a Vce detection unit for short circuit protection, an active clamping circuit for overvoltage protection and a digital The first connector of the PCB of the processor and the second connector for connecting to the built-in NTC thermistor of the IGBT module. The IGBT driver also includes a DC / DC power supply. The first connector includes 20 pins, the 5th pin and the 7th pin are use...

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Abstract

The invention relates to an IGBT driving protection system which comprises an IGBT driver and an IGBT fault feedback module, wherein the IGBT driver comprises a Vce detection unit for short circuit protection, an active clamping circuit for over-voltage protection, a first connector for being connected with a PCB with a digital processor, and a second connector for being connected with a built-in NTC thermal sensitive resistor of the IGBT module. The IGBT driving protection system is compact in appearance, simple to mount, good in universality, simple in external circuit and applicable to all 17mm double-tube IGBT modules, a small amount of elements are needed, the cost is reduced, and due to a DC / DC power supply is assembled, electric partitioning of the power supply and a gate electrode driving circuit is achieved.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to an IGBT-based drive protection system. Background technique [0002] At present, M57962AL is commonly used for IGBT overcurrent protection, which is an integrated circuit integrating drive and protection (called a hybrid drive module). (ON) is directly proportional to the collector current Ie. The size of Ie can be judged by detecting the size of Uce(ON). Different types of hybrid drive modules have different output capabilities, switching speeds, and du / dt tolerances. Use It should be selected appropriately according to the actual situation. The threshold voltage action value of the overcurrent protection of the hybrid drive module itself is fixed, generally 7-10V, so there is a problem of cooperating with the IGBT. The usual method is to adjust the number of diodes V connected in series between the IGBT collector and the drive module, such as figure 1 shown. The sum of the...

Claims

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Application Information

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IPC IPC(8): H02H7/20H02H9/04
Inventor 束龙胜杨艳杨振刘建文汪霞
Owner ANHUI XINLONG ELECTRICAL
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