高压变频器输出滤波器研究

Study of the Filter at the Motor Terminals in a High Voltage Inverter Drive System

详细分析了电机与逆变器间长传输电缆对电机的影响机理、逆变器共模电压产生机理以及所提出的输出滤波器的拓扑结构。利用 MATL AB的 Simulink环境 ,对所研究的拓扑结构的仿真研究结果看出 ,所提出的拓扑结构切实可行 ,可最大限度减小电机终端的 dv/ dt和共模电压 ,提高逆变器输出质量 。

The influence of the long cable between the motor and the inverter is analyzed in detail. The principle of the common mode voltage produced by the inverter is also presented. The topology of the output filter has been introduced. Some simulation results based on an advanced simulation tool 'simulink tools MATlab software' is given. Based on simulation results, an important conclusion can be drawn that the high overvoltage applied at the motor terminals and the common mode voltage can be effectively reduced, which can improve the quality of the output current of the inverter and lengthen the motor lifespan.