Torque Ripple Reduction of Switched Reluctance Motor by Implementing a New Converter based on DITC Method

Due to the simplicity of structure and reliability in working at a vast range of speeds, Switched Reluctance Motor (SRM) has gained attention in recent decades for different applications including but not limited to Electric Vehicles (EVs), electrified trains, and transactive applications. However, the torque ripple is the main disadvantage of these motors. In conventional Asymmetric converters, due to using a constant DC-link voltage, it is impossible to achieve a multilevel voltage. Hence, the total torque will decrease and subsequently, the output power is limited. This paper presents a newly designed converter with a modified DC-link which is capable to provide a DC-link voltage twice as much as Asymmetric converters. Many control methods have been proposed to reduce the torque ripple in SRMs and Direct control methods are one of the effective control methods to do so. Hence, Direct Instantaneous Torque Control (DITC) is applied to the proposed converter in this paper to demonstrate the advantages of the proposed converter on the SRMs torque ripple reduction.