Rotary dynamo electric machine with protection against demagnetization of low flux portion of permanent magnet poles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 11, 1984
Grant Date -
N/A
app pub date -
Nov 22, 1982
filing date -
Nov 27, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A permanent magnet dynamo electric machine is provided with a shield of high saturation flux density at the weaker or lower flux tip or edge of a permanent magnet pole face to prevent both circumferential and axial demagnetization of that portion of the pole face. The shield resides in a recess in the pole face so as to maintain a constant width air gap between the rotor and stator and has a thickness in the range of 5-15% of the overall thickness of the shield and pole combined. The shield and its pole face extend axially at least over the entire axial dimension of the area swept by the rotor.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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