Noise-cancelling quadrature magnetic position, speed and direction sensor

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870283

Preston, Mark A ^[1]; King, Robert D ^[2]

---

1. Niskayuna, NY
2. Schenectady, NY

An array of three magnetic sensors in a single package is employed with a single bias magnet for sensing shaft position, speed and direction of a motor in a high magnetic noise environment. Two of the three magnetic sensors are situated in an anti-phase relationship (i.e., 180.degree. out-of-phase) with respect to the relationship between the other of the two sensors and magnetically salient target, and the third magnetic sensor is situated between the anti-phase sensors. The result is quadrature sensing with noise immunity for accurate relative position, speed and direction measurements.

• Research Organization: Ford Motor Company, Detroit, MI (United States)
• DOE Contract Number: AC07-90ID13019
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 5489844
• OSTI ID: 870283
• Country of Publication: United States
• Language: English

Related Subjects

noise-cancelling
quadrature
magnetic
position
speed
direction
sensor
array
sensors
single
package
employed
bias
magnet
sensing
shaft
motor
noise
environment
situated
anti-phase
relationship
180
degree
out-of-phase
respect
magnetically
salient
target
third
result
immunity
accurate
relative
measurements
relative position
phase relationship
magnetic noise
magnetic sensors
shaft position
direction sensor
magnetic sensor
/324/