A Modified SVPWM technique for PMBLDC Motor for DC-link current control

Articles in Press

Document Type : Research Article

Authors

1 Electrical and Electronics Engineering, Velagapudi Ramakrishna Siddhartha Engineering College, Siddhartha Academy of Higher Education Deemed to be University, Vijayawada, India

2 Electrical and Electronics Engineering, St.Joseph’s College of Engineering, OMR, Chennai, India

3 Electrical and Electronics Engineering, St.Joseph’s Institute of Technology, OMR, Chennai, India

10.24200/sci.2025.65105.9299

Abstract

The permanent magnet brushless DC (PMBLDC) motor has proven enhanced performance over new classes of motors. The vector-controlled PMBLDC motor is mainly required for speed control drives such as electrical vehicles, robotics, and automotive industries. These motor drive systems typically incorporate a DC-link capacitor and position sensors. In PMBLDC motors, torque is significantly affected by the commutation pattern and phase current. The commutation process involves using the DC-link capacitor to reverse the current direction, resulting in considerable fluctuations in the torque profile. However, the conventional space vector pulse width modulation (SVPWM) technique falls short in effectively minimizing torque ripple, especially in automotive applications. To address this challenge, a modified field-oriented control (FOC) based SVPWM technique is proposed. This method prevents the reversal of DC-link current, thereby reducing torque ripple during commutation. The various operating modes of the proposed technique are comprehensively explained. By eliminating DC-link current reversal, the FOC-based SVPWM technique achieves a notable reduction in torque ripple. The proposed approach has been validated through simulations conducted using the Matlab Simulink toolbox, and experimental results obtained using an FPGA controller further confirm the effectiveness of the simulation findings.

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Scientia Iranica

Articles in Press, Accepted Manuscript
Available Online from 11 May 2025

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History

  • Receive Date: 03 September 2024
  • Revise Date: 09 December 2024
  • Accept Date: 14 April 2025

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