Stator winding for two-speed electrodynamic machines having fractional speed ratios
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United States of America Patent
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-
Sep 4, 1990
Grant Date -
N/A
app pub date -
Oct 27, 1987
filing date -
Oct 27, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A stator for electrodynamic machines provides for more efficient design by reducing the total number of stator legs required for two-speed, two-phase motors and for generators producing electrical power at either of two frequencies while operating at a constant speed. This is accomplished by external switching, so that at one condition, all coils on all stator legs are energized in the normal symmetrical pattern, while at the other condition, all coils on all stator legs are energized in a non-symmetrical pattern.
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