Permanent magnet synchronous motor and drive system
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United States of America Patent
Stats
-
Sep 4, 2012
Grant Date -
Apr 8, 2010
app pub date -
Oct 2, 2009
filing date -
Oct 3, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hybrid motor for powering a compressor of a chiller system includes a first rotor portion and a first stator portion configured as a permanent magnet motor and a second rotor portion and a second stator portion configured as a reluctance motor. The second rotor portion includes a reluctance-type rotor, and the second stator portion includes electromagnetic windings capable of inducing a rotary magnetic field. The first rotor portion and the second rotor portion are attached to a common drive shaft. The reluctance motor is arranged to generate start-up torque and initiate rotation of the drive shaft until the drive shaft achieves a predetermined rotational speed. The permanent magnet motor is arranged to power the drive shaft between the predetermined rotational speed and a maximum rotational speed.
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