Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter
Patent
1987-09-28
1990-05-15
Wong, Peter S.
Electric power conversion systems
Frequency conversion without intermediate conversion to d.c.
By semiconductor converter
363157, 318809, H02M 5257
Patent
active
049263072
ABSTRACT:
An electric motor having a rotor, a stator and a plurality of windings on the stator is provided with power, via a plurality of rectifiers, from an a.c. polyphase source. The rectifier means are coupled between individual ones of the plurality of windings and respective individual ones of the a.c. polyphase source. The rectifier means may be full-wave or half-wave rectifiers. The rectifiers may be diodes, SCR's, TRIACS or the like. The windings are wound on the stator with substantially equal angular distribution. The winding may have a concentric and/or overlapping relationship. High and low (half) speed operation may be affected, using a plurality of switches.
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Bloom Leonard
Peckman Kristine
Wong Peter S.
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