Brushless DC motor and brushless DC motor controller
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 10, 2006
Grant Date -
Jun 8, 2006
app pub date -
Nov 28, 2003
filing date -
Nov 28, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A brushless DC motor has a stator and a rotor. An angle .theta..sub.0 between an edge section of the flux barrier on a magnetic pole center side and an edge section on a side for coming in contact with the rib of adjacent flux barrier, with respect to the rotor center, is determined to be equal to or greater than an angle satisfying a following relationship .theta..sub.0=180.degree.*m/(Pn*f/f.sub.0) (provided 2.theta..sub.0-.theta..sub.r<90.degree.) wherein, a frequency of vibration which is to be reduced is represented with f, a pole pair number is represented with Pn, an electrical frequency is represented with f.sub.0=Pn*N, a motor revolution is represented with N, m=1, 3, 5, . . . , an angle of the rib with respect to the rotor center is represented with .theta..sub.r, therefore making of motor highly effective and decreasing of the motor acoustic noise are coped with.
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