Reduction of commutation current ripple (CCR) in the brushless direct current motor (BLDCM) drive using dc‐dc converter based topologies is achieving widespread popularity. However, undesired alternating current (AC) components are presented in the dc‐link voltage (DCLV) across the capacitor of the dc‐dc converter, which leads to a destabilization of the power supply during the commutation interval. In addition, unwanted audible noise and speed regulation occur which deteriorates the motor performance. In order to encounter these issues, different conventional compensation techniques based on the low‐pass filter (LPF) has been proposed. However, the LPF requires a close relation between dynamic coupling and active compensation. In view of the limitation, this paper proposes a notch‐filter to stabilize the DCLV. Performance of the notch‐filter is tested on a configuration of the BLDCM based on the front‐end zeta (FEZ) converter and DCLV selector circuit. The notch‐filter is used to stabilize the DCLV, whereas the DCLV selector circuit is employed to draw the regulated voltage drawn from the FEZ converter. Simulation and experimental results verify the effectiveness of the proposed control scheme for the BLDCM drive. The simulation and experimental results clearly reveal that the notch‐filter along with FEZ converter effectively stabilized the DCLV and alleviate the CCR.

Although brushless direct current motor (BLDCM) drives are becoming more popular in industrial and commercial applications, there are still significant difficulties and unresolved research issues that must be addressed. In BLDCM drives, commutation current ripple (CCR) and diode freewheeling during non-commutation zone (NCZ) are the major challenges. To overcome these limitations, this paper proposes a novel PWM-Model Antiseptic Control (PWM-MAC) technique to alleviate the freewheeling of the diode. The proposed PWM technique is used to alleviate the diode freewheeling in the NCZ, whereas the DCLV circuit is utilized to obtain variable DC-link voltage to address the CCR in the CZ. The MATLAB/Simulink results are included along with experimental results obtained from a laboratory prototype of 325 W. The proposed module reduces the current ripple by 31.7% and corresponding torque ripples are suppressed by approximately 32.5%. This evidences the performance of the proposed control technique.

The brushless dc motor (BLDCM) drive is suffering from current/torque ripples. The DC-DC converter based BLDCM drive topology is widely preferred to suppress ripples. The improved characteristics such as low mechanical oscillation and stiff-speed regulation of BLDCM further introduces undamped AC signal which results destabilization of DC-link power (DCLP) supply. The different breeds of filter techniques have been recommended to stabilize the DCLP supply. However, the recommended filters are composed on the basic of concept of low pass filter (LPF) or band pass filter (BPF). In addition, these filters requires a precise association with active atonement, current reference and nonlinear interaction. In this context, a notch-filter (NF) has applied to stabilize the DCLP supply. The NF is investigated for a super-lift-Luo (SLL) converter assist BLDCM drive. The SLL converter is employed to suppress commutation current ripple (CCR) whereas the NF is applied to draw stabilized DCLP supply. A hardware prototype is developed and results are given to confirm the effectiveness of the proposed stabilization strategy and design. Thus, the suggested compensation technique effectively stabilized the DCLP supply of SLL converter employed to CCR mitigation in the BLDCM drive.