Discontinuous Pulse Width Modulation In Flux Angle Control Of Induction Motors

In this study, flux angle control (FAC) with discontinuous modulation is presented for induction motor drives with the aim of optimizing motor and inverter losses under light load conditions. The proposed approach implements the discontinuous modulation technique in flux angle control for the first time and emphasizes proper drive performance while reducing its losses. The discontinuous pulse width modulation (DPWM) method optimizes switching by strategically injecting zero sequence voltages, reducing inverter losses and thermal stress on power electronics components, and improving system reliability. The proposed method is simulated in MATLAB software and compared with PWM and SVM techniques in drive efficiency and loss reduction. Comprehensive simulations confirm the superior performance of this combined approach and show the optimal balance between switching losses, harmonic quality, and current and torque ripple compared to PWM and SVM methods. The simplicity of implementation of the DPWM method, along with its ability to maintain acceptable output voltage quality and reduce overall system losses, while taking advantage of the advantages of PWM and SVM methods, emphasizes its suitability for practical industrial applications. This work contributes to the continued development of high-efficiency motor drive systems by highlighting the advantages of integrating flux angle control with discontinuous modulation strategies.