Internal permanent magnet motor with an outer rotor
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United States of America Patent
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Jun 25, 2019
Grant Date -
Aug 31, 2017
app pub date -
Oct 2, 2015
filing date -
Oct 15, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Provided is an electric motor comprising: a stator comprising stator poles arranged radially and a rotor comprising rotor poles, each comprising: a substrate comprising a magnetically permeable material and at least a first magnet and a second magnet. The magnets can comprise a respective proximal end proximal to the stator and a respective distal end opposite the respective proximal end, and distal from the stator. A distance between respective proximal ends of the magnets can be equal to or greater than a distance between respective distal ends of the magnets. Each rotor pole also comprise first and second proximal cavities, each cavity extending from the respective proximal end of a magnet for a given length along about the circumferential direction and away from the proximal end of the other magnet. Sum of the lengths of the proximal cavities can be about equal to a width of each stator pole.
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