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Optimized PWM Techniques with 3rd Harmonic Injection for Five Phase Concentrated Winding Induction Motor with Open-End Stator

This paper presents different approaches to optimize the PWM techniques for lower switching losses by using clamping technique for five-phase concentrated winding induction motor with an open-end stator. In such machines, apart from fundamental, the 3rd harmonic component also contributes to the electromagnetic torque generation. Thus, the addition of a 3rd harmonic component in the modulating waveform will also help in improving the torque handling capability of the motor. Apart from adding a 3rd harmonic component, proposed PWM techniques also minimize or mitigate the common mode current. In the given manuscript, three PWM schemes for dual inverter fed five phase concentrated winding induction motor with open-end stator are proposed. The proposed PWM techniques use the carrier-based approach, which avoids any sector identification or timing calculation. The given approaches are also verified using both simulation and experimental results.