Abstract
The brushless DC motor (BLDCM) has high torque, compact size, and high efficiency. Therefore, BLDCM is widely used in computers, household and industrial products, and automobiles. It is usually driven by a hard-switching pulse width modulation (PWM) inverter, which has low switching frequency, high switching loss, high electro-magnetic interference (EMI) and acoustic noise, et al. A novel resonant pole (RP) voltage-source-inverter (VSI) is proposed for brushless DC motor (BLDCM). It can realize zero voltage switching (ZVS) operation of all power devices in inverter by adding auxiliary resonant unit in three phases output. Auxiliary resonant switches are turned on and off under zero current switching (ZCS). A PWM scheme (TPWM + TON) is presented for novel resonant pole inverter. It achieves good balance of neutral-point voltage and reduces switching frequency of main and auxiliary switches to half of PWM frequency. Subsequent experimental results confirm validity soft switching inverter and control scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 99-106 |
| Number of pages | 8 |
| Journal | Diangong Jishu Xuebao/Transactions of China Electrotechnical Society |
| Volume | 23 |
| Issue number | 12 |
| State | Published - Dec 2008 |
Keywords
- Brushless DC motor
- Pulse width modulation (PWM)
- Zero current switching
- Zero voltage switching