Method of winding motors and other electric machines to reduce AC losses
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United States of America Patent
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Jul 6, 2004
Grant Date -
N/A
app pub date -
Feb 16, 1999
filing date -
Feb 16, 1999
priority date (Note) -
Expired
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Abstract
Non-random windings are employed to reduce the proximity effect in electrical machines, including rotating machines such as various types of motors. Thus, with respect to electrical machinery of the type wherein multi-strand electrical wiring is received within a slot relative to a surface associated with the transmission of magnetic flux, a method of dressing the wiring within the slot according to the invention includes the step of winding the strands of each turn in one or more layers, each layer being substantially parallel to the surface associated with the transmission of magnetic flux. The winding may be a multi layer winding, in which case the windings associated with each layer are preferably separated by an insulating layer. The invention is applicable to various types of machines and motors, including AC, brushless DC and variable reluctance (VR) types. The conductors may be of a circular cross section or other geometry, such as flattened tapes.
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