University of Isfahan Computational Intelligence in Electrical Engineering 2821-0689 14 3 2023 09 23 Introducing a New Hybrid Method to Reduce BLDC Motor Torque Ripple, Based on Predictive Control and Quasi Z-Source Converter Introducing a New Hybrid Method to Reduce BLDC Motor Torque Ripple, Based on Predictive Control and Quasi Z-Source Converter 123 140 27932 10.22108/isee.2023.137028.1620 FA Ahmad Entezari Faculty of Electrical & Computer Engineering, Malek Ashtar University of Technology, Tehran, Iran Arash Dehestani Kolagar Faculty of Electrical & Computer Engineering, Malek Ashtar University of Technology, Tehran, Iran Mohammad Reza Alizadeh Pahlavani Faculty of Electrical & Computer Engineering, Malek Ashtar University of Technology, Tehran, Iran Journal Article 2023 03 07 The commutation torque ripple adversely affects the performance of the six-phase inverter of the BLDC motor with trapezoidal back EMF and creates vibration and noise for industrial applications. In this paper, the motor model is obtained in non-commutation times and during the commutation period, and according to that, a suitable method to reduce the torque ripple, by equalizing the slope of the current disconnected from the motor and the slope of the current connected to the motor during commutation, is presented. At low speeds, torque ripple is reduced using predictive pulse width modulation technique. With this method, the duty cycle of the switch involved in the commutation is predicted and applied to the switch during the commutation intervals. At high speeds, this reduction is done using quasi z-source converter and selector circuit. The quasi z-source converter and the selector circuit increase the input voltage of the inverter during commutation intervals and increase its value to four times the back EMF voltage of the motor, thus reducing the torque ripple at high speeds. The theoretical and analytical results are verified using the simulations performed in the PLECS software. The commutation torque ripple adversely affects the performance of the six-phase inverter of the BLDC motor with trapezoidal back EMF and creates vibration and noise for industrial applications. In this paper, the motor model is obtained in non-commutation times and during the commutation period, and according to that, a suitable method to reduce the torque ripple, by equalizing the slope of the current disconnected from the motor and the slope of the current connected to the motor during commutation, is presented. At low speeds, torque ripple is reduced using predictive pulse width modulation technique. With this method, the duty cycle of the switch involved in the commutation is predicted and applied to the switch during the commutation intervals. At high speeds, this reduction is done using quasi z-source converter and selector circuit. The quasi z-source converter and the selector circuit increase the input voltage of the inverter during commutation intervals and increase its value to four times the back EMF voltage of the motor, thus reducing the torque ripple at high speeds. The theoretical and analytical results are verified using the simulations performed in the PLECS software. https://isee.ui.ac.ir/article_27932_a86b1b1fbad340fe246c9ab641dfc471.pdf