Common mode current attenuation techniques for use with PWM drives
Common mode current attenuation techniques for use with PWM drives
复制标题
用于 PWM 驱动器的共模电流衰减技术
DOI：
10.1109/63.911149
复制
发表时间：
2001
影响因子：
6.7
通讯作者：
T. Kume
中科院分区：
文献类型：
--
作者：
M. Swamy;K. Yamada;T. Kume
可调速驱动器 (ASD) 中电机控制最常见的调制策略是脉宽调制 (PWM)。一般来说，输出调制的载波频率范围为 1.0 kHz 至 20.0 kHz。 PWM 驱动器的经验表明，存在两个重要问题：(1) 共模电流； (2)当电机与逆变器之间的距离大于临界距离时，电机出现过电压。高载波频率以及所采用的绝缘栅双极晶体管 (IGBT) 的快速上升和下降时间会产生重要的共模或接地电流。高 dv/dt 会产生轴电压，进而产生轴承电流。这种现象已被确定为 PWM 驱动电机轴承过早失效的原因之一。提出了一种衰减共模噪声从而降低轴电压的新方案。还提供了表明所提出解决方案有效性的实验结果。
The most common modulation strategy adopted for motor control in adjustable speed drives (ASDs) is pulse width modulation (PWM). In general, the output is modulated at a carrier frequency ranging from 1.0 kHz to 20.0 kHz. Experiences with PWM drives have shown that there exist two important concerns: (1) common mode current; and (2) over-voltage at the motor when the distance between motor and the inverter is larger than the critical distance. The high carrier frequency along with fast rise and fall time of the insulated gate bipolar transistors (IGBTs) employed results in nontrivial common-mode or ground currents. The high dv/dt causes shaft voltage, which leads to bearing currents. This phenomenon has been identified as one of the reasons for premature bearing failure in PWM driven motors. A new scheme to attenuate the common mode noise and hence reduce shaft voltage is proposed. Experimental results showing the effectiveness of the proposed solution is also presented.