Title: BLDC drive commutation current ripple minimisation using a high-performance novel active switched inductor and switched capacitor-based QZS DC-DC converter

Authors: Chandra Shekhar Singh Chandal; Amitesh Kumar

Addresses: Department of Electrical Engineering, National Institute of Technology Patna, Bihar, India ' Department of Electrical Engineering, National Institute of Technology Patna, Bihar, India

Abstract: Although brushless direct current motor (BLDCM) drives are gaining popularity in commercial and industrial applications, a few significant problems and research subjects still have not been conquered and need to be addressed. Its low inductance and electronic commutation both contribute to a decrease in the predicted performance of the motor. The commutation of the phases is the basic cause of the ripples that are present in the form of the current wave. This study introduces a novel approach that utilises a high boost non-isolated quasi-Z-source (qZS) DC-DC converter at the beginning of a BLDC drive, together with an active switched-inductor (ASI) along with a switched-capacitor (SC) and DC link voltage (DCLV) circuit. Using a high step-up non-isolated quasi-Z-source DC-DC converter with ASI and SC, combined with the three-phase voltage source inverter, has effectively minimised the fluctuation in the commutation torque. The control method and switch selector circuit have been incorporated into the system to achieve the desired input DC during the commutation phase. For developing and testing the suggested 325 W drive, MATLAB/Simulink software is utilised. The simulation results demonstrate that the proposed module reduces torque ripples in the commutation region by 40.6% compared to conventional techniques. This illustrates the efficacy of the proposed system.

Keywords: BLDC motor; commutation torque ripple; commutation current ripple; quasi-Z-source; qZS; high gain DC-DC converter; switched capacitor; SC; active switched inductor; ASL.

DOI: 10.1504/IJPELEC.2025.143955

International Journal of Power Electronics, 2025 Vol.21 No.1, pp.46 - 68

Received: 07 May 2024
Accepted: 21 Oct 2024
Published online: 15 Jan 2025 *