Low cogging motor
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United States of America Patent
Stats
-
Dec 15, 1987
Grant Date -
N/A
app pub date -
Jun 20, 1986
filing date -
Jun 20, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A three phase, permanent magnet rotor, AC electric motor includes a twenty-four unskewed slot stator wound in a three phase arrangement and an eight pole permanent magnet rotor in which the rotor pole pieces are unskewed and angularly displaced from equally 45.degree. spaced reference positions about the rotor by different amounts which are integral multiples of 1.875.degree.. The cogging frequency is eight times higher and the cogging torque are eighth that of a corresponding motor with a conventional permanent magnet rotor.
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Cited Art Landscape
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