High-temperature-resistant self-powered wide bandgap power device driving control circuit

Abstract

A high-temperature-resistant self-powered wide bandgap power device drive control circuit comprises an enhanced drive current control circuit unit, a demagnetization reset control circuit unit, an integrated drive conversion transformer, a drive shaping control circuit unit, a negative voltage power supply conversion control circuit unit, a negative voltage clamping control circuit unit and a peak suppression control circuit unit. According to the integrated drive conversion transformer, the input side coil, the output side coil and the negative voltage conversion coil are wound on the same framework, and the framework is embedded into the magnetic core of the transformer, so that the functions of driving control and power conversion are integrated on the same transformer, and electrical isolation and level conversion of input signals are realized; meanwhile, a negative turn-off voltage conversion function required by the driving shaping control circuit unit is realized; the invention solves the problem of high-frequency and high-reliability driving control when the wide bandgap power device is applied to a high-temperature and high-power density occasion, and is suitable for realizing a reliable driving function based on the wide bandgap power device.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a drive control circuit for a high temperature resistant self-powered wide bandgap power device. Background technique [0002] High-power power conversion technology is developing rapidly, but the working environment temperature of this kind of power supply is generally lower than 120°C, which cannot be applied to some high-temperature environments, such as harsh environments such as launch vehicles, multi-electric aircraft, ships, tanks, and oil drilling. The highest working temperature in some geothermal energy development fields is close to 200°C, and some work in the field of geothermal energy development even as high as 300°C or more. In view of the demand for high-power power conversion technology in special fields with extremely high temperature environments, based on the high-voltage, high-temperature, and high-temperature characteristics of SiC wide-bandgap power devices...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing normal temperature drive control technology, propose a high temperature resistant self-supplied wide bandgap power device drive control circuit, and solve the problem of wide bandgap power devices used in high temperature and high power density applications. The problem of high-frequency and high-reliability drive control is suitable for the realization of reliable drive functions based on wide-bandgap power devices in power circuits such as switching power supplies, frequency converters, and drives.

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