Implementation of NSPWM Algorithm for CMV Reduction in Indirect Matrix Control Fed Induction Motor Drive System

Matrix Converters (MC) are very significant for direct AC-AC conversion instead of AC-DC and DC-AC. In this direct AC-AC conversion, the Common Mode Voltage (CMV) output is very high. The leakage currents that are produced from the common mode voltage due to dv/dt rise cause very severe problems, such as making disturbances like electromagnetic noise, that is developed from the equipment which is placed nearer to the converter. The scalar approach provides equivalent performance to the vector approach. In this paper the scalar approach is chosen due to its simplicity. In this paper, a Near State Pulse Width Modulation (NSPWM) is proposed to ensure the operation of the inverter at a steady switching frequency. A positive or negative DC bus is clamped to any phase in each sector over a fundamental cycle of the proposed NSPWM algorithm. Thus, the suggested technique controls the inverter’s switching frequency and reduces switching losses. The experimental findings demonstrate that the suggested NSPWM algorithm performance has been examined and contrasted with traditional PWM techniques. When motor drives are operating within the optimal modulation index range, the method performs better overall and outperforms the most challenging PWM techniques.