Angular position homopolar reluctance sensor

Details Angular position homopolar reluctance sensor Angular position homopolar reluctance sensor

1992-08-07

1995-02-28

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310114, H02K 1100, H02K 1602

Patent

active

053940423

ABSTRACT:
A homopolar reluctant sensor comprises a magnetic material rotor including a cylindrical body having at a first end a laminated part comprising the same number of lobes as there are sensor pole pairs and at a second end a ring and a magnetic material stator comprising a cylindrical portion provided with an excitation coil energized by an alternating supply, a first ring having notches and defining with said laminated part a first airgap and a smooth second ring defining with said rotor ring a second airgap. The stator notches are provided with a winding such that the voltage induced therein is sinusoidal and free of harmonics. The envelope of this voltage represents, apart from a phase-shift, the position of the rotor relative to the stator.

REFERENCES:
patent: 4928046 (1990-05-01), Karasawa
patent: 4982125 (1991-01-01), Shirakawa
patent: 5041749 (1991-08-01), Gaser et al.
patent: 5243279 (1993-09-01), Bajat et al.

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