Intelligent power module and air-conditioner

Abstract

The invention provides an intelligent power module and an air-conditioner. The intelligent power module comprises three phases of upper bridge arm signal input ends, three phases of lower bridge arm signal input ends, three phases of low-voltage reference ends and a current detection end. An HVIC tube is provided with wiring terminals connected to the three phases of upper bridge arm signal input ends and the three phases of lower bridge arm signal input ends respectively, and a first port corresponding to the current detection end. Each phase of low-voltage reference end and the current detection end are both connected to the first end of a sampling resistor, and the second end of the sampling resistor is connected to the negative end of a low-voltage area power supply of the intelligent power module. The first input end of a self-inspection circuit is connected to the U phase of 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 second input end of the self-inspection circuit is connected to the first port. The self-inspection circuit is used for transmitting signals of the U phase of upper bridge arm signal input end to the U phase high-voltage area signal output end and further suppressing voltage noise generated by the first port when the HVIC tube starts working.

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 (Intelligent Power Module, referred to as IPM) is a power driver that integrates power electronic discrete devices and integrated circuit technology. 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 suitable for inverters and various inverter power supplies for driving motors. Ideal power electronic d...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, due to the wiring of peripheral circuit boards and other reasons, especially in the case where there are many common grounds, a large voltage noise is generated on the MTRIP pin at the moment of system startup, and these noises are often several times that of V1. , sometimes the duration of the noise voltage greater than V1 will be greater than T1, this is, it will cause false triggering of MTRIP, so that the system cannot start normally

However, if the T1 time is set too long, it will cause the intelligent power module 100 to overheat abnormally for too long, resulting in product degradation, shortening the product life, and even the risk of instant explosion

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