Absolute rotation position detector with coaxial resolvers

Details Absolute rotation position detector with coaxial resolvers Absolute rotation position detector with coaxial resolvers

1990-06-18

1991-07-16

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68B, 310114, 341112, H02K 2400, G01B 730, G01D 504

Patent

active

050327500

ABSTRACT:
An absolute position detector for detecting an absolute position of a rotating shaft (1) includes a rotatable shaft and first gearing for operatively coupling the rotating shaft to the rotatable shaft (3a). Resolvers are provided, each having a stator and a rotor. The stator includes pole teeth made of a magnetic material and arranged along an outer circumference of the rotating shaft at a distance from the rotating shaft. The rotor includes a rotor made of a magnetic material respectively associated with pole teeth and located between the rotating shaft and pole teeth. Second gearing operatively couples the rotor of the resolvers to the rotatable shaft. Upon a rotation of the rotating shaft, the first gearing causes the rotatable shaft to rotate, and upon a rotation of the rotatable shaft, the second gearing (14 and 15) causes the rotor of each of the resolvers, at incrementally different gear ratios, to vary reluctance of a magnetic circuit formed by the pole teeth of an associated stator portion.

REFERENCES:
patent: 4733116 (1988-03-01), Schulz

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