Common mode current elimination in multi-drive industrial systems

Author

Consoli, A. ; Cacciato, M. ; Gennaro, F. ; Scarcella, G. ; Testa, A.

Author_Institution

Catania Univ., Italy

Volume

3

fYear

1999

fDate

1999

Firstpage

1851

Abstract

The paper deals with the common mode current issue in a multi-drive system. Common mode currents are caused by step variations of the common mode voltage, strictly related to the sequence of the inverter states during the voltage pulsewidth modulation. An inexpensive technique that allows to compensate the common mode voltage variation in multi-drive systems composed of two or more inverters is proposed, in order to eliminate the common mode currents. The common mode current paths and generation mechanisms are reviewed and the influence of the inverter state sequence on the common mode voltage and currents is pointed out. Based on such considerations, a new digital PWM modulation strategy is introduced to compensate the common mode voltage variations generated in a two PWM inverter system

Keywords

DC-AC power convertors; PWM invertors; compensation; motor drives; power filters; PWM inverter system; common mode current elimination; common mode current paths; common mode voltage variations compensation; digital PWM modulation strategy; generation mechanisms; inverter state sequence; multi-drive industrial systems; Acoustic noise; Costs; Digital modulation; Insulation; Leg; Pulse inverters; Pulse modulation; Pulse width modulation inverters; Shafts; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1999. Thirty-Fourth IAS Annual Meeting. Conference Record of the 1999 IEEE

Conference_Location

Phoenix, AZ

ISSN

0197-2618

Print_ISBN

0-7803-5589-X

Type

conf

DOI

10.1109/IAS.1999.805991

Filename

805991