The difference between the dc frequency conversion air conditioning and ac frequency conversion air conditioning

gost motor 7.5kw
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
Ac frequency conversion air conditioning is converts mains power frequency 220 v to 220 v dc power supply, and send it to the power module (transistor switch, etc.); Module is controlled by microcomputer control signal from the at the same time, the output variable frequency power supply (synthetic waveform similar to sine wave), make the compressor motor speed changes over the frequency of the power supply, which can control the displacement compressor, fast regulating system of ANP gost motor refrigeration and heat. Dc inverter air conditioner is also the mains power frequency converting 220 v dc power supply, and sent to the power module, frequency conversion module each time two triode single phase ac motor conduction (A + and A - not at the same time conduction, B +, B - not at the same time conduction, C +, C - not at the same time conduction), to the two-phase windings to direct current (dc), at the same time the module is controlled by the microcomputer, the output voltage variable dc power supply (there is no inverter process), as shown in figure 7, Single phase motor and will be sent to the compressor of the dc motor, dc power supply control displacement compressor. As can be seen from the figure 6, dc inverter ac frequency conversion more than one position detection circuit, makes the dc inverter control more accurate.