Synchronous Machine Torque Ripple Reduction using Seesaw Space Vector Pulse Width Modulation (SSSVPWM)

Distributed Generation (DG) from renewables offers a promising future in transitioning towards sustainable energy systems. However, connecting these renewable DG systems to the grid via inverters presents a set of challenges, such as maintaining grid stability and reliability, voltage fluctuations, frequency variations, and power quality disturbances. These issues necessitate advanced control algorithms for inverters and grid synchronization techniques. Addressing these challenges is crucial for realizing the full potential of renewable DGs of the electrical grid. Multi-phase inverters in DG can have a significant impact on the efficiency and performance on the multi-phase motors as loads. Harmonic content in Inverter output is proportional to the torque ripple in a motor. These ripples contribute to reduced overall efficiency, may lead to motor overheating and cause variations in the motor’s output torque, leading to uneven and jerky motor operation with reduced driving comfort and efficiency. Higher torque ripples can put stress on the insulation system of motor windings, potentially leading to insulation failures and reduced motor reliability. The proposed technique reduces the torque ripples in a motor by an algorithm designed for a PWM that have positive impacts on performance and efficiency of the overall system. The proposed Seesaw Space Vector PWM switching pattern in Inverters will improve the power quality level in the emerging style of DG systems causing steady-state waveform distortion. Thereby Inverters operated by specific Modulation technique play a vital role in reducing the torque ripples in electric machines and consequently improving the stability of the systems. This paper presents the mitigation of torque ripple content by designing a space vector-based switching pattern of SVPWM. In this paper, the proposed switching pattern will have a reduced torque ripple compared to that of a conventional SVPWM at different switching frequencies (SF) and Modulation Index (MI) values without changes in hardware configuration. The results include significant improvement in torque ripples at relatively high modulation indices. The conventional SVPWM and the proposed SSSVPWM performance comparison is done by obtaining output torque through driving a Permanent Magnet Synchronous Machine with two-level three-phase voltage source inverter output.