Induction Motor Drive with H-Bridge Cascaded Converter

This work presents an innovative control approach for Power Factor Correction (PFC) in a three-phase PWM AC chopper. It employs the HBCC technique to drive a three-phase squirrel cage Induction Motor (IM) and supports both soft starting and speed control modes. What sets this strategy apart is its remarkable simplicity, reliability, high efficiency, and cost-effectiveness, achieved by minimizing the number of power semiconductor switches in the power circuitry. The three-phase PWM AC chopper is built using only four IGBTs, and a new closed-loop control methodology is devised, utilizing just two gate pulses to manage these four IGBTs.