Smart Power Modules and Air Conditioners

Abstract

The invention provides an intelligent power module and an air conditioner. The intelligent power module includes: a signal input terminal of a three-phase upper bridge arm, a signal input terminal of a three-phase lower bridge arm, and a temperature detection terminal; The signal input terminal of the upper bridge arm and the terminal of the signal input terminal of the three-phase lower bridge arm, and the first port corresponding to the temperature detection terminal, the first port can output the corresponding voltage value according to the resistance change of the thermistor in the intelligent power module; The input end of the self-inspection circuit is connected to the U-phase upper bridge arm signal input end, the output end of the self-inspection circuit is connected to the U-phase high voltage area signal output end of the HVIC tube, and the input and output ends of the self-inspection circuit are connected to the first port , the self-test circuit is used to transmit the signal of the signal input terminal of the U-phase upper bridge arm to the signal output terminal of the U-phase high-voltage area, and detect the thermistor when the HVIC tube starts to work, so as to detect the abnormality of the thermistor Compensate for the resistance of the thermistor.

Description

technical field [0001] The present invention relates to the technical field of intelligent power modules, in particular to an intelligent power module and an air conditioner. Background technique [0002] Intelligent Power Module (IPM) is a power driver that integrates power electronic discrete devices and integrated circuit technology. The intelligent power module includes power switching devices and high-voltage drive circuits, and has overvoltage, overcurrent and overheating and other fault detection circuits. The logic input terminal of the intelligent power module receives the control signal of the main controller, and the output terminal drives the compressor or subsequent circuits to work, and at the same time sends the detected system status signal back to the main controller. Compared with traditional discrete solutions, intelligent power modules have the advantages of high integration, high reliability, self-test and protection circuits, etc., and are especially s...

AI Technical Summary

Problems solved by technology

[0005] Generally speaking, the intelligent power module can work in an environment of 125°C, so the T2 temperature is generally designed to be above 100°C, but with the deterioration of the NTC thermistor, the temperature T1 when the resistance value drops to Rth is smaller than T2, once If T1 is lower than 80°C, the module will be difficult to work normally, causing the module to be scrapped, and then the system will be paralyzed

Images