High-efficiency and low acoustic noise drive system using open-winding AC motor and two space-vector-modulated inverters
Kawabata, Y.
Nasu, M.
Nomoto, T.
Ejiogu, E.C.
Kawabata, T.
Dept. of Electr. Eng. & Comput. Sci., Osaka Prefectural Coll. of Technol.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug 2002
Volume: 49,
Issue: 4
On page(s): 783- 789
ISSN: 0278-0046
INSPEC Accession Number: 7356031
Digital Object Identifier: 10.1109/TIE.2002.801059
Current Version Published: 2002-11-07
Abstract
The combining of the outputs of two inverters using interphase reactors is a widely used method for supplying large AC drives rated at more than several thousands kilowatts. Certain drawbacks are associated with this method, such as high acoustic noise and high losses due to the interphase reactors. To overcome these problems, the authors propose a new high-efficiency drive system using an open-winding motor and two space-vector-modulated inverters. This configuration consists of a three-level inverter with switching at once every cycle and a two-level inverter of about 1-kHz switching frequency, connected, respectively, to the opposite terminals of the open-winding AC motor. With the proposed configuration, good current waveforms, high efficiency, and low acoustic noise can be obtained.
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