Abstract
Recently mitigation of commutation current ripple in the brushless direct current (BLDC) motor drive using DCDC converter topology is gaining more popularity. However, some alternating current (AC) components are presented in the DC-link voltage across the capacitor used in the DC-DC converter, which leads to a destabilization of the power supply during the commutation interval. 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 of LPF, authors have employed proportional-resonant (PR) compensator to stabilize the DC-link voltage. The PR compensator is used to stabilize the DC-link voltage and DClink voltage selector circuit is employed to achieve a regulated DC voltage from the MSEPIC 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.
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