PWM-Induced Current Modelling in Stator Slots with Multiple Stacked Coils

The chapter delves into the complexities of PWM-induced current modelling in stator slots with multiple stacked coils, a crucial aspect of integrated modular motor drives. It introduces the concept of segmenting ordinary windings into stacked coils, enhancing control degrees of freedom and enabling the use of low voltage semiconductor devices. The study focuses on a practical model of two stacked coils, investigating the trade-offs between PWM-induced losses and fundamental current distribution losses. The analytical model accurately represents the influence of conductor position on inductance values, while the high-frequency model estimates PWM-induced current ripple and losses. The chapter concludes by synthesizing the findings, demonstrating that optimal current distribution can minimize total losses, making it a valuable resource for professionals seeking to optimize energy management in electrical machines.