A novel single-three phase inverter adopting CTA scheme

A new switch-linearity hybrid power conversion (CTA) technique is introduced to combine with a conventional single-three phase inverter, so that the effect on three phases´ unbalance can be minimized, as can the harmonic content on load and torque ripples on the motor. Experiments show that the proposed system can operate in the audio switch frequency range but has no audio noise from the motor load, which is of benefit to human health, lasts the power devices´ life, also qualifies the processing matched to the motor´s operation