Intelligent power module (IPM) and air conditioner

Abstract

The invention provides an intelligent power module (IPM) and an air conditioner. The first output end of an adaptive circuit in the IPM serves as the enable end of an HVIC tube. The first input and output end, the second input end and output end, the third input and output end and the fourth input and output end of a PFC switching circuit are correspondingly connected to the signal output end, the PFC low-voltage reference end and the PFC end of a PFC driving circuit and the second output end of the adaptive circuit respectively. Power switching tubes with corresponding functions are realized through the PFC switching circuit according to level signals input by the fourth input and output end of the PFC switching circuit. The adaptive circuit outputs signals at a first level through the second output end of the adaptive circuit when the temperature of the IPM is lower than a preset temperature value, outputs enable signals at a corresponding level through the first output end of the adaptive circuit according to input signals at the input end of the adaptive circuit, outputs signals at a second level through the second output end of the adaptive circuit when the temperature of the IPM is higher than the preset temperature value, and outputs enable signals at a corresponding level through the first output end of the adaptive circuit according to the input signals at the input end of the adaptive circuit.

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

Although this false trigger will recover after a period of time without causing damage to the system, it will undoubtedly cause confusion for users

For example, in the application of inverter air conditioners, the higher the ambient temperature is, the more the user needs the continuous operation of the air conditioning system, but the high ambient temperature will increase the reverse recovery time of the FRD tube, and the probability of MTRIP being falsely triggered will increase. When MTRIP is triggered by mistake, the air conditioning system will stop working for 3 to 5 minutes due to the mistaken belief that overcurrent has occurred, so that users cannot obtain cold air during this period. This is one of the main reasons why the air conditioning system receives complaints from customers due to insufficient cooling capacity.

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