D.C. motor phase windings and their commutation
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United States of America Patent
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-
Nov 30, 1999
Grant Date -
N/A
app pub date -
Oct 29, 1996
filing date -
Oct 29, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Five phase windings (P1-P5) of a motor 30 are disposed on a common stator 32. An rotor 34 contains three magnetic pole pairs (M1N, M1S, M2N, M2S, M3N, M3S). Each phase winding is energized for 72.degree. (electrical) corresponding to 24.degree. rotor rotation (mechanical). During the first half (36 electrical degrees) of each phase winding's electrical energization, the immediately preceding phase winding is simultaneously energized, and during the second half (36 electrical degrees) of each phase winding's electrical energization, the immediately succeeding phase winding is energized. At any given time, only two of the phase windings, and no others, are being simultaneously energized.
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