DC-Link Current Ripple Reduction in Switched Reluctance Machine Drives

Abstract

—Because the dc-link current is created during phase commutation in low-frequency harmonics, switched reluctance machine (SRM) drives necessitate a significant dc link capacitor. Putting in a large the cost of the drive is greatly influenced by the capacitor bank in the drive and total volumetric power density. The purpose of this section is to analyze SRM's dc-link current ripple and present a control technique to minimize dc-link current ripple while maintaining machine operating performance. The suggested approach uses a high-pass filter to extract the ripple components of the dc-link current. The controller makes certain that ripple power circulates between phases, lowering the dc supply's pulsating energy demand. The dc-link ripple is reduced over a broad speed range allows for efficient and dependable drive operation without the addition of any additional hardware system. The proposed control technique's effectiveness for both steady-state and transient conditions using simulation outcomes.