Rotor with permanent magnet having structure between magnets for reducing flux leakage and demagnetization
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United States of America Patent
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-
Nov 22, 2016
Grant Date -
May 29, 2014
app pub date -
Nov 26, 2013
filing date -
Nov 26, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A rotor includes a rotor core and a plurality of magnetic pole parts. The rotor core has a magnet insertion hole. The magnet insertion hole includes a first peripheral edge portion and a second peripheral edge portion spaced away from the first peripheral edge portion in a radial direction of the rotor. The rotor core includes a holding part and a protrusion. The holding part extends along the radial direction from the first peripheral edge portion of the magnet insertion hole. The holding part abuts against a circumferential end portion of each of the plurality of permanent magnet pieces. The protrusion extends toward the second peripheral edge portion of the magnet insertion hole. The protrusion is spaced away in the radial direction from the second peripheral edge portion of the magnet insertion hole.
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