Abstract: The paper mainly introduces the unique control algorithm of inverter compressor (Abbreviation: RAMDA). It includes two parts, power factor adjustment and compressor driving method. A-PAM method is introduced in the Power factor adjustment part. Compressor driving method mainly includes of two kinds of torque control, over modulation, Weak field control and Beatless.

Key words: Beat phenomenon, Harmonic wave, Torque control, Weak field control, Power factor, Over modulation