Novel Two-Phase PWM Scheme by Using Variable Switching Pause Period for Unbalanced Three-Phase Inverter

Abstract

Unbalanced parameters of the parasitic components in a three-phase inverter cause unbalanced losses in the device. This research focuses on equalizing the device's losses for an unbalanced three-phase inverter. This letter proposes a novel two-phase (2ϕ) PWM scheme that uses the variable switching pause period. This letter numerically equalizes the device's losses for the unbalanced three-phase inverter.

Loss and Temperature Evaluation of Unbalanced Three‐Phase Inverter Driven Two‐Phase PWM Scheme Using Variable Switching‐Pause Period

“…In this study, we developed a novel two‐phase pulse‐width modulation (PWM) scheme by using the variable switching‐pause period to equalize the losses of the three phases of an unbalanced three‐phase inverter. Further, we demonstrated via numerical calculations that the proposed two‐phase PWM scheme achieves its purpose [13]. Notably, another research group has proposed a similar scheme [14].…”