Electric machine with pole arrangement
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United States of America Patent
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-
Jan 2, 2018
Issued Date -
N/A
app pub date -
Oct 28, 2014
filing date -
May 2, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electric machine can include a stator, a rotor frame and a pole arrangement with: plural segment pieces disposed circumferentially around, and fastened to, the rotor frame; permanent magnet pieces positioned on inclined side edges of each segment piece; and plural pole pieces disposed circumferentially around the rotor frame and disposed alternatingly with the segment pieces. The magnet pieces are pressed between inclined side edges of the pole pieces and the inclined side edges of the segment pieces. The segment pieces, the permanent magnet pieces and the pole pieces form a closed ring around the outer surface of the rotor frame, with plural such rings being arranged after each other in an axial direction. An axial air channel can pass through the rings, and at least one radial air duct (R1, R2) between the rings.
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