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Ac frequency conversion compressor motor is general three-phase ac asynchronous motor, dc brushless dc permanent magnet motor is of frequency conversion compressor rotor motor. Three phase motor Frequency conversion power module is also called intelligent power transistor, referred to as "IPM, a thick film integrated encapsulation. This article focuses on the output of the ac frequency conversion air conditioning circuit, there single phase induction motor are three kinds of common frequency conversion power circuit. One kind is to use a separate IPM, as shown in figure 1, IPM 11 terminals, direct welding outside control main edition; A circuit board is made of IPM and frequency conversion circuit integration, the whole circuit in the polyester encapsulation, and control ANP gost motor main board with a communication port control, is unable to repair; One is using IPM and drive circuit or the power supply circuit of frequency conversion power template, IPM has 21 terminal, control element can be seen, can repair, and control main board have signal connection.
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