2014年11月12日星期三

The working process of the frequency conversion air conditioning inverter


AC fan cooling motor fan cover 

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

4. Type: Motor Cover 
CPU control six trigger terminals u, v, w, x, y, z, the upper arm and lower arm of IPM of ac electric motor six power tube in accordance with the "three phase six take" the sine law of conduction and globe, on the output side of u, v, w approximate standard three-phase sinusoidal alternating current (ac), the variable frequency three- phase compressor operation. "Three phase six pat" trigger signal controlled by CPU, CPU can change output arguments based on the detection of the frequency of the alternating current, which can make 220v electric motor the compressor speed changes. Actual measurement can be achieved by the size of the output three-phase ac voltage judgment speed, higher voltage, faster; The voltage is reduced, slow. Boot at the beginning of IPM start acmotor2.blogspot.com three-phase ac voltage around 40 v output, make compressor frequency startup, reduces the starting current and avoid the impact of power grids. Start after 1 minute or so, speed up into a transitional stage, the ac voltage is 100 v or so. After entered the stage of frequency conversion control according to the set temperature, the maximum output voltage to ac 200 v.

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