Weak current College】 【DC inverter difference with AC frequency --- Power By】 【China power house network.

The last two years, the inverter air conditioner with high efficiency, low noise, and controlling sensitive features in air conditioner market reputation big noise. Currently on the market there are two variable-frequency AC-DC inverter air conditioner and AC inverter air conditioner, their difference of compressor (AC inverter compressor or DC inverter compressor) and compressor to bring controller changes. AC frequency variable compressor essentially remains a three-phase AC induction motor, through the stator and rotor magnetic interactions between the rotor spinning. Its special design allows for larger range by changing the frequency and voltage of the power to change the motor speed, so called AC frequency conversion.

AC frequency variable compressor rotor adopts AC induction motor rotor structure, its working principle is: the rotating magnetic field of the stator, rotor generated in stator rotating magnetic field induced current induced magnetic fields generated by the magnetic field and rotor-stator interaction enables the rotor rotating magnetic field. AC frequency variable compressor rotation is based on the stator and rotor induction to the rotation of the compressor associated electromagnetic noise and the negative effects of rotor losses, etc.

DC inverter compressor rotor with rare-earth permanent magnetic material, its working principle is: stator produces the rotating magnetic field and rotor magnet magnetic fields directly, the realization of compressor operation. You can change the DC voltage to the motor to change the motor speed, DC inverter compressor stator rotating magnetic field does not exist on the rotor induction effect, overcome AC inverter compressor electromagnetic noise and rotor loss, than the AC frequency compressor efficiency high and low noise characteristics, DC inverter compressor efficiency ratio high frequency compressors 10%-30%, the noise low 5 DB-10 DB. However, the DC inverter air conditioner cost than AC inverter air conditioner.