Abstract
To achieve high performance and the high power density in motor control system, the higher switching frequency of inverter is required to increase the efficiency and performance of converter. However, higher switching frequency may cause higher switching losses, higher electro-magnetic interference (EMI) and lower overall efficiency. The use of soft-switching techniques in inverter can resolve these problems. A novel parallel resonant DC link (PRDCL) voltage source inverter (VSI) is proposed for motor drives, which has advantages of soft-switching inverter and pulse width modulation (PWM). Realize soft switching operation of all switching devices in inverter by adding auxiliary resonant unit to DC link of conventional one. Auxiliary switches are also operated under zero current switching (ZCS) or zero voltage switching (ZVS). Resonant time is short and resonance only uses an inductor, so resonant unit consumes little power. The position and width of zero voltage transition can be freely selected, and resonance is carried on without threshold restriction. Simulation and subsequent experiment are performed for brushless DC motor (BLDCM), and their results confirm validity of soft switching inverter presented.
| Original language | English |
|---|---|
| Pages (from-to) | 60-65 |
| Number of pages | 6 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 28 |
| Issue number | 12 |
| State | Published - 25 Apr 2008 |
Keywords
- Motor drives
- Parallel resonance
- Voltage source inverter
- Zero current switching
- Zero voltage switching