Mitigation of Commutation Current Ripple in the BLDC Motor Drive Based on DC-DC Converter Using PR Compensator

Abstract Mitigation of commutation current ripple (CCR) in the brushless direct current (BLDC) motor drive using DC-DC converter based topologies are achieving widespread popularity. However, undesired alternating current (AC) components are presented in the DC-link voltage across the capacitor of the DC-DC converter which leads to a destabilization of the power supply during the commutation interval. In addition, undesired speed regulation and audible noise occur which deteriorates the motor performance. In order to encounter this problem, different conventional compensation techniques based on the low-pass filter (LPF) has been proposed. However, LPF requires a close relation between dynamic coupling and active compensation. In view of the limitation, this paper proposes a proportional-resonant (PR) compensator to stabilize the DC-link voltage. Performance of the PR compensator is tested on a combination of modified single-ended primary inductor converter (MSEPIC), DC-link voltage selector circuit is used in the proposed current ripple mitigation technique for BLDC motor drive. The PR compensator is utilized to stabilize the DC-link voltage whereas the DC-link voltage selector circuit is employed to achieve a regulated DC voltage from the MSEPIC converter for efficient current ripple suppression during the commutation interval. Simulation and experimental results verify the effectiveness of the proposed compensation scheme for current ripple mitigation technique of BLDC motor drive. The simulation and experimental results clearly reveal that the PR compensator effectively stabilized the DC-link voltage, which alleviates the CCR.

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