Title :
Reduction of common mode currents in PWM inverter motor drives
Author :
Cacciato, Mario ; Consoli, Alfio ; Scarcella, Giuseppe ; Testa, Antonio
Author_Institution :
Dept. of Electr., Electron. & Syst. Eng., Catania Univ., Italy
Abstract :
Modern PWM inverter motor drives are affected by dangerous common mode currents due to the high rate of variation of the modulated voltage. An inexpensive alternative to low pass filters which are normally used to limit common mode currents, consists in reducing such currents by using suitable modulation strategies. In the present paper a new approach for designing PWM strategies is presented able to reduce common mode currents by limiting the amount of variations of the common mode voltage. The main characteristics of the proposed approach are experimentally evaluated on a standard PWM induction motor drive
Keywords :
DC-AC power convertors; PWM invertors; bipolar transistor switches; induction motor drives; insulated gate bipolar transistors; machine testing; machine theory; power bipolar transistors; power semiconductor switches; IGBT devices; PWM inverter; characteristics; common mode currents reduction; common mode voltage variations; induction motor drive; modulated voltage variation; modulation strategies; Capacitance; Costs; Fluctuations; Low pass filters; Motor drives; Pulse width modulation; Pulse width modulation inverters; Stator windings; Switching frequency; Zero voltage switching;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.643146