Power module thermal management device and method based on drive circuit adaptive adjustment

Abstract

The invention discloses a power module heat management device based on self-adaptive adjustment of a driving circuit. The power module heat management device based on the self-adaptive adjustment of the driving circuit comprises a DSP analog voltage output circuit arranged between the driving circuit and an IGBT grid, and an IGBT grid charging and discharging control loop, wherein the IGBT grid charging and discharging control loop is used for providing a charging and discharging loop for a stray capacitor of the IGBT grid, and the DSP analog voltage output circuit is used for generating the control voltage of the IGBT grid charging and discharging control loop. According to the power module heat management device based on the self-adaptive adjustment of the driving circuit, the base current of the IGBT grid charging and discharging control loop is adjusted by adjusting the output analog voltage of the DSP analog voltage output circuit, then the collector current of a triode is adjusted, and namely, the grid peak current of an IGBT is adjusted. According to the power module heat management device, the circuit is simple, and the problems of circuit impact and time delay which are caused by driving voltage switching are solved; an extra driving circuit is not needed by adjusting the given voltage of the triode in a control circuit.

Description

Technical field [0001] The present invention relates to the field of power module thermal management, and in particular to a power module thermal management device and method based on an improved drive circuit. Background technique [0002] With the widespread application of wind power, the reliability of wind power converters has attracted widespread attention. Since the wind power converter is a weak subsystem, the failure of the wind power system is largely due to the failure of the internal converter. As the core component of the converter, power devices are costly and are easily affected by complex working conditions and accidents, so they are also the most vulnerable part. In order to reduce the cost of operation and maintenance of the device and extend its service life, it is necessary to improve its reliability. [0003] Because the reliability of power devices is affected by many factors, experts at home and abroad have obtained its characterization through experimental ...

AI Technical Summary

Problems solved by technology

This method, due to the addition of additional circuits, often makes the drive circuit too complex, while increasing useless losses

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