Title :
Research of inverter output filters for PWM drives
Author :
Hongfei, Ma ; Dianguo, Xu
Author_Institution :
Dept. of Electr. Eng., Harbin Inst. of Technol., China
Abstract :
When long motor cables are used between a PWM inverter and motor, there will be voltage reflection, which contributes to overvoltage and damped high-frequency ringing at motor terminals which further stresses the motor insulation. In this paper, cable transmission line theory is analyzed, which indicates that overvoltage is dependent on the risetime of the PWM pulse and the cable length. The problem can be solved by some passive filtering techniques. Then the analysis and design of the motor terminal filter and inverter output filters are presented, experimental results show that the filters can effectively reduce the overvoltage at the motor terminals
Keywords :
AC motor drives; PWM invertors; overvoltage; passive filters; power cables; transmission line theory; AC drives; PWM inverter; cable length; damped high-frequency ringing; inverter output filters; long motor cables; motor terminal filter; motor terminals; overvoltage; passive filtering techniques; voltage reflection; Cable insulation; Filtering; Passive filters; Pulse width modulation; Pulse width modulation inverters; Reflection; Space vector pulse width modulation; Stress; Transmission line theory; Voltage control;
Conference_Titel :
Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on
Conference_Location :
Shenyang
Print_ISBN :
7-5062-5115-9
DOI :
10.1109/ICEMS.2001.970732
