Dynamoelectric machine with ferromagnetic end winding ring
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United States of America Patent
Stats
-
Dec 5, 2000
Grant Date -
N/A
app pub date -
Feb 10, 1998
filing date -
Feb 10, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A dynamoelectric machine such as a motor or generator has an end winding ring of ferromagnetic material in an area of the end winding portions of the stator and/or rotor winding. The end winding ring improves the overall power density of the motor by reducing the stator and/or rotor flux leakage (the magnetic flux that is produced by the windings that is not utilized to produce torque in the rotor). By operatively coupling end winding portions of the stator winding with ferromagnetic material, the end winding portion is employed to produce torque in the rotor. The end winding ring may be a ring of ferromagnetic material attached to the stator core or the frame or the rotor, or may be a coating of ferromagnetic material applied indirectly to the end winding portions. The end winding ring also may support the end winding portions to reduce movement thereof.
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