Slotless, brushless, large air-gap electric motor
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United States of America Patent
Stats
-
Apr 8, 1997
Issued Date -
N/A
app pub date -
Jun 20, 1995
filing date -
Dec 15, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A polyphase electric motor includes a stator having a field winding and a field backiron, and a rotor disposed within the stator including a permanent magnet with a plurality of pole pairs, wherein the field winding includes a plurality of coil segments, each coil segment having a plurality of electrically conductive turns of a polygonal shape, the turns in each coil segment having circumferentially opposite sides, the circumferentially opposite sides of relatively adjacent turns being circumferentially offset with respect to one another in the same circumferential direction so that each coil segment occupies a length generally equal to the arcuate length of two pole faces, each coil segment further including a subsegment of turns electrically commutated in accordance with a different one of a plurality of field phases.
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Cited Art Landscape
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