Dynamo electric machine with upwardly shifted ripple frequency
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United States of America Patent
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-
Jan 10, 1989
Grant Date -
N/A
app pub date -
Jun 17, 1982
filing date -
Jun 17, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary electric dynamo machine in which the ripple component in the output occurs at a higher frequency. One half of the pole faces have a nonuniform airgap while the other half have a uniform air gap and cover a noninteger slot distance. The armature has an odd number of slots. Instead of the usual ripple component at the slot frequency, a dynamo constructed as described above, surprisingly, has a predominant ripple component at twice the slot frequency.
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