Bipolar or unipolar drive back-EMF commutation sensing method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 13, 1993
Issued Date -
N/A
app pub date -
Nov 7, 1990
filing date -
Sep 25, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus to commutate the drive voltages of a brushless DC motor without sensors. The present invention determines rotor position and velocity by detecting the polarity reversal of the Back-EMF of an undriven leg when compared to the transformed reference. In an extra measure of efficiency, it includes a commutation delay timing circuit for optimization of motor operation, and it minimizes the participation of a microprocessor or other microcontroller.
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