Sung-Jin Jang, "스위칭 손실 저감을 위한 공통 전원형 하이브리드 이중 인버터에서 새로운 변조 기법," 아주대학교 공학석사 학위 논문, 2023. > Paper

This thesis proposes a new modulation method to reduce switching loss in hybrid dualinverters with a common power source. When compared to other dual inverters, a dualinverter with a common power source generates a zero-sequence current (ZSC). The ZSCincreases switching loss and torque ripple, deteriorating driving performance. If a six-stepmodulation method to reduce switching loss is applied, the ZSV and the ZSC are generatedby switching. When proposed modulation method 1 is used to reduce the ZSV, ZSC, andswitching loss for the hybrid dual inverter, the number of inverter 2 switches is doubled, andthe inverter 2 switching loss is concentrated. The switching concentration maximizes theeffect of reducing switching losses. The proposed modulation method 2 reduced the doubleswitching to 1.33 times compared to the proposed modulation method 1. The proposedmodulation methods reduce the ZSC and switching loss for hybrid dual inverter. Theeffectiveness of the proposed modulation methods for the OEW-IPMSM fed by a hybriddual inverter was validated by the simulation and experimental results.