A.C. motor control
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 21, 1993
Grant Date -
N/A
app pub date -
Apr 2, 1991
filing date -
Apr 2, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A low cost control system for precise positioning employs an a.c. motor and a variable frequency power source for the motor. When the desired position is approached, the frequency of the source is decreased to a low constant value, and the motor is stopped in timed relation to the leading edge of a feedback signal from a position responsive feedback sensor.
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