Accurate rotor position sensor and method using magnet and sensors mounted adjacent to the magnet and motor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 17, 2004
Issued Date -
N/A
app pub date -
Feb 14, 2003
filing date -
Jul 20, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for controlling a brushless electric motor including a rotor, a sense element with a plurality of magnetic pole pairs, and first and second sensors mounted less than or equal to 120 electrical degrees apart with sensing planes oriented perpendicular to an adjacent surface of the sense element and perpendicular to a movement direction of the sense element relative to the sensors, wherein one of a) the sense element and b) the first and second sensors is mounted in a fixed relationship with the rotor, the method including measuring magnetic flux of the plurality of magnetic pole pairs using the first and second sensors and outputting a corresponding measurement signal for each at least one first and second sensor, determining a rotational position of the rotor based on the measurement signals, and controlling the motor based on the determined rotor position.
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