Position sensing apparatus for measuring the angular position of

Details Position sensing apparatus for measuring the angular position of Position sensing apparatus for measuring the angular position of

1992-07-10

1994-04-05

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

310 68B, 318661, 32420717, 32420718, G01B 730, H02K 2400, G01D 520

Patent

active

053008847

ABSTRACT:
A sensor for measuring the angular position of a rotor relative to a stator has firstly a rotor made of a magnetic material and including 2 p lobes, where p is an integer. A stator is positioned around the rotor. The stator is made of a magnetic material and includes a number of teeth equal to 2n.p, where n is the number of phases of the sensor. Each tooth is surrounded both by an excitation first winding and by reception second winding. The excitation windings are connected together in series and disposed on the teeth such that the windings on two circumferentially adjacent teeth produce magnetic flux in opposite directions. The set of said excitation windings are powered by an alternative current or voltage. The reception windings of the same phase and offset by 180 electrical degrees are connected together in series. The envelope of the signal at the terminals of each of the pairs of reception windings represent the angle of rotation of the rotor relative to the stator, to within a scaling factor.

REFERENCES:
patent: 2467306 (1949-04-01), Habig
patent: 4743786 (1988-05-01), Ichikawa et al.
patent: 4893078 (1990-01-01), Auchterlonie
Patent Abstracts of Japan, vol. 006, No. 171 (P-140) Sep. 4, 1982 & JP-A-57 088 317 (S G:KK) Jun. 2, 1982.

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