Electrostatic protection device, intelligent power module and frequency conversion household appliance

Abstract

The invention discloses an electrostatic protection device. The electrostatic protection device comprises an electrostatic protection module. The electrostatic protection module is connected to any IGBT in an intelligent power module and used for conducting electrostatic protection on any IGBT. The invention further provides the intelligent power module and a frequency conversion household appliance. According to the technical scheme, under the condition that the intelligent power module is powered down, the IGBTs are prevented from being damaged by high-voltage static of a ground end, using safety of the intelligent power module is guaranteed, and the service life of the intelligent power module is prolonged.

Description

technical field [0001] The invention relates to the technical field of static electricity protection, in particular to an electrostatic protection device, an intelligent power module and a frequency conversion household appliance. Background technique [0002] Intelligent Power Module, or IPM (Intelligent Power Module), is a power drive product that combines power electronics and integrated circuit technology. The intelligent power module integrates the power switching device and the high-voltage driving circuit, and has built-in fault detection circuits such as overvoltage, overcurrent and overheating. On the one hand, the intelligent power module receives the control signal from the MCU to drive the subsequent circuit to work, and on the other hand, it sends the system status detection signal back to the MCU. Compared with the traditional discrete solution, the intelligent power module wins more and more markets due to its advantages of high integration and high reliabili...

AI Technical Summary

Problems solved by technology

[0021] If an IGBT tube with a thinner gate oxide thickness is used, the intelligent power module 100 is very susceptible to electrostatic damage, resulting in a very high rate of production off-line, and there is also a great risk of electrostatic damage in actual use; because the damaged IGBT Therefore, if it is damaged in actual use, it is easy to cause the upper and lower bridge arms to conduct at the same time, causing the current of the intelligent power module 100 to run out of control and cause an explosion

[0022] If an IGBT tube with a thicker gate oxide thickness is used, the switching speed of the intelligent power module 100 will be severely reduced, and the switching loss of such an intelligent power module 100 is extremely high, which will cause a great loss in the application occasions where the switching frequency is above kilohertz. Heat generation, even with the largest heat sink possible, the operating temperature of the intelligent power module 100 will be higher than the ambient temperature by more than 60°C, and the long-term operation of the intelligent power module 100 in a high-temperature environment will cause serious performance degradation and shorten its service life. life

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