Permanent magnet rotating machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 20, 2009
Grant Date -
Jun 7, 2007
app pub date -
Nov 27, 2006
filing date -
Dec 1, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Permanent magnets 52a1, 52a2 are inserted into magnet insert holes 51a1, 51a4 formed in a main magnetic pole 50A of a rotor 50. An outer circumferential surface of the rotor includes a first outer circumferential surface portion 50a which intersects with a d-axis and second outer circumferential surface portions 50da, 50ab which intersect with a q-axis. A radius R2 of curvature of the second outer circumferential surface portions 50da, 50ab is larger than a radius of curvature of the first outer circumferential surface portions 50a. Recesses 50a1, 50a2 are formed in the second outer circumferential surface portions 50da, 50ab and in a position to face end walls 51a2, 51a5 of the magnet insert holes 51a1, 51a4 which are adjacent to the outer circumferential surface of the rotor. It is constructed such that [(74/P).degree..ltoreq..theta..ltoreq.(86/P).degree.] and [(16/P).degree..ltoreq..alpha..ltoreq.(48/P).degree.], where .theta. is a mechanical angle of the first outer circumferential surface portion 50a, P is the number of pairs of poles of the rotor 50, and .alpha. is a mechanical angle of the recesses 50a1, 50a2.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully