Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems
Reexamination Certificate
2005-11-15
2008-10-21
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Hysteresis or reluctance motor systems
Reexamination Certificate
active
07439702
ABSTRACT:
A chiller system includes a switched reluctance motor for powering the compressor of the chiller system. A variable speed drive with a boost converter provides a boosted voltage to the switched reluctance motor. The switched reluctance motor and the compressor may be disposed within the same hermetic enclosure and driven by a common drive shaft. Cooling for both the variable speed drive and the switched reluctance motor is provided from condenser water in the condenser water circuit, or from an intermediate liquid cooled by water from the condenser circuit to increase system efficiency. Windage losses are reduced by barriers introduced within the motor, and by maintaining a reduced pressure in the switched reluctance motor.
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James E. Vrancik, Prediction of Windage Power Loss in Alternators, NASA Technical Note NASA TN D-4849, National Aeronautics and Space Administration, Washington, D.C., Oct. 1968, pp. 1-18.
Jadric Ivan
Schnetzka Harold Robert
Smith Stephen Harold
Donovan Lincoln
Glass Erick
McNees Wallace & Nurick LLC
York International Corporation
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