Enhancement design of eleven-level cascaded h-bridge motor driver application

Abstract

This study focuses on the design and implementation of an innovative eleven-level cascaded H-Bridge motor drive (11L-CHBMD) controlled by a three-phase step-sine pulse width modulation (SSPWM) technique. A novel mathematical model was developed by converting control equations into matrix format, facilitating precise simulation and practical realization of the system. MATLAB Simulink was employed for the simulation, while the STM32F429ZGT6 microcontroller and power MOSFETs were used for hardware implementation. The proposed system ensures a regulated high-voltage, variable-current output and achieves harmonic distortion levels below 5 %, in compliance with IEEE-519 standards. Experimental results showed the motor driver 11L-CHBMD's high capability to drive three-phase induction motors efficiently, offering superior performance compared to conventional topologies. The SSPWM method reduced total harmonic distortion (THD) while maintaining system stability under ohmic, inductive, and unbalanced load conditions. Fuzzy and PID controllers enabled precise torque, speed, and current regulation while stabilising faster. The 11L-CHBMD proposed circuit, developed using commonly available components, achieves a cost reduction of approximately 90 % compared to market-available designs, making it suitable for industrial, renewable energy and different applications. Its modular design supports scalability and offers potential for driving motors in hazardous environments or remote areas using solar energy. With its adaptability and efficiency, the proposed 11L-CHBMD stands as a compelling alternative to traditional power inverters.