Three-Phase PWM Converter Control of Induction Motor with H-Bridge Cascaded Converter Employing Fuzzy Logic Controller

Electrical Engineering

This study introduces a novel control approach for Power Factor Correction (PFC) in a three-phase PWM AC chopper utilizing the HBCC technique to drive a three-phase squirrel cage Induction Motor (IM) with soft starting and speed control modes. The power circuitry of this strategy stands out for its simplicity, reliability, high efficiency, and cost-effectiveness due to its minimized count of power semiconductor switches. The three-phase PWM AC chopper is constructed with four IGBTs. A new closed-loop control methodology is developed, utilizing only two gate pulses to manage the four IGBTs. The proposed control strategy centers around three key objectives: achieving smooth start-up, regulating speed, and enhancing input PFC. These objectives are met by adjusting the Root Mean Square (RMS) value of the input voltage supplied to the IM terminals. The effectiveness of the proposed control approach is thoroughly examined, analyzed, and validated through simulation experiments conducted under various test conditions.

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