Abstract
This article proposes a new pulsewidth modulation (PWM) scheme that reduces common-mode (CM) voltage and switching losses simultaneously in CSI. The proposed PWM [i.e., reduced voltages PWM (RVM)] reduces CM voltages and switching losses by selecting the optimal zero current vector and PWM sequence based on the CSI output voltage conditions. This article also proves the proposed RVM achieves both objectives (i.e., reduced CM voltage and switching losses) simultaneously for all CSI operating conditions without compromising the other objective. The proposed RVM inherently achieves zero-voltage switching (ZVS) conditions during the zero current vector transitions, further reducing the switching losses. Experimental results demonstrate significant reductions in CM voltage, reaching up to approximately 95%, accompanied by an increase of up to about 5.5% in CSI efficiency across a wide operating range compared to alternative PWM methods, confirming the predicted advantages of the proposed RVM.
| Original language | English |
|---|---|
| Pages (from-to) | 9788-9802 |
| Number of pages | 15 |
| Journal | IEEE Transactions on Transportation Electrification |
| Volume | 10 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2024 |
| Externally published | Yes |
Funding
This work was supported by the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) through the Vehicle Technologies Office (VTO) under Award DE-EE0008704. An earlier version of this paper was presented at the IEEE Applied Power Electronics Conference and Exposition (APEC), Orlando, Florida, March 19 23, 2023 The authors gratefully acknowledge the support of the Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC).
Keywords
- Common-mode (CM) voltage
- current source inverter (CSI)
- pulsewidth modulation (PWM)
- switching losses