Shaft position sensor employing a wiegand-effect device

Details Shaft position sensor employing a wiegand-effect device Shaft position sensor employing a wiegand-effect device

1990-11-13

1991-10-15

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310111, 310155, 310168, 310181, 310261, 324174, 32420715, H02K 1100

Patent

active

050577271

ABSTRACT:
A Wiegand-effect shaft position sensor is excited by an alternating magnetic field generated by stationary magnets or solenoids interacting with a high-strength, toothed wheel that is fixed to the rotor. A set of three stationary poles are situated proximate to the rotor and are connected together by a yoke. The magnets or solenoids are mounted in the outside poles of the set of three stationary poles. The central stationary pole contains a Wiegand-effect device. In operation, a flux reversal in the Wiegand-effect device occurs at twice the frequency at which the poles of the toothed wheel pass the stationary poles, resulting in the generation of sharp voltage pulses indicative of rotor position.

REFERENCES:
patent: 3947711 (1976-03-01), Presley et al.
patent: 3999107 (1976-12-01), Reuting
patent: 4150314 (1979-04-01), Zabler et al.
patent: 4217512 (1980-09-01), Hauler
patent: 4700133 (1987-10-01), Day
Bulletin No. 2000, Sensor Engineering Co., pp. 1-2; (81) 1987; Hamden, Conn.

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