The principle of power inverter

AC fan cooling motor fan cover 

Specifications
1. Customised 
2. good quality 
3. Surface treatment: Galvanize 

4. Type: Motor Cover 
The principle of power inverter. Power inverter (also called frequency conversion module) is converts dc frequency and voltage adjustable three-phase ac frequency conversion device, as shown in figure 5, the frequency conversion air conditioning usually adopt six IGBT bridge driving circuit. Power transistor as switch element cross - straight - to pay circuit, control circuit to make each power transistor conduction 180 ℃, auto parts and the same two transistor bridge arm wholesalemotor.blogspot.com a conduction, the other must be shut off. The element conduction phase difference between electric motor 12v 500w two phase at 120 ℃, within 360 ℃ of arbitrary has three power tube conduction in three-phase load is connected. When the control signal output, A +, A -, B +, B, C +, C - the power tube conduction respectively, thus the three-phase alternating current (ac) compressor operation of output frequency change. In practice, use the IPM (Intelligent Power Module) Module and around the circuit, such as switching Power supply circuit. IPM is a kind of intelligent power module, it will be together with the IGBT ac motor drive circuit and protection circuit encapsulation within the same module, so as to simplify the design, improve the reliability of the whole system. Frequency conversion air now tuning commonly used IPM module has Japan's mitsubishi and sanyo IPM series.