Simplified driving circuit of high-voltage converter

Abstract

The invention relates to a high-voltage converter, in particular to a simplified driving circuit of the high-voltage converter, aiming at solving the problem of the driving circuit of the existing immature high-voltage converter. The simplified driving circuit comprises the driving circuit, a power supply circuit and a protective circuit; besides, the structure of the function circuits of the simplified driving circuit of the high-voltage converter has the self characteristics, the simplified driving circuit is essentially characterized in that an optical fiber emitter and an optical fiber receiver are respectively adopted in the driving circuit and the protective circuit, and a driving chip U13 with the functions of power supply output and high voltage isolation is selected for use, so that the high voltage isolation between the simplified driving circuit of the high-voltage converter and other circuits can be effectively realized, and the high voltage and heavy current of a high voltage IGBT flowing through the high-voltage converter is effectively prevented from damaging other circuit connected with the simplified driving circuit. The electrical isolation can reach 10kV; the voltage state of a main loop can be feedback, and an IGBT power module can be protected to run safely; furthermore, at present, the driving circuit can be successfully assembled on four quadrants and an inverter module of a motor train unit.

Description

technical field [0001] The invention relates to a high-voltage converter, in particular to a drive circuit for a high-voltage IGBT in the high-voltage converter, in particular to a simplified drive circuit for the high-voltage converter. Background technique [0002] According to international practice and my country's national standards for the division of voltage levels, when the power supply voltage is ≥ 10kY, it is called high voltage, and when it is 1kV ~ 10kV, it is called medium voltage. But we are also used to call a motor with a rated voltage of 6kV or 3kY as a "high voltage motor". High-voltage motors are widely used in enterprises and railway fields. Therefore, we call the converters driving 1-10kV AC motors high-voltage converters. However, the speed regulation and starting methods in our country are still very backward, which wastes a lot of energy and causes low mechanical life. Therefore, the benefits and potentials of popularizing and applying high-voltage ...

AI Technical Summary

Problems solved by technology

The drive circuit of the high-voltage converter is the key core component in the converter device, which can provide drive signals and protection circuits. There are no successful cases of this technology in China, and there are no relevant literature reports.

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