Rotational position sensor having variable coupling transformer

Details Rotational position sensor having variable coupling transformer Rotational position sensor having variable coupling transformer

1994-11-21

1996-04-02

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420713, 32420722, 32420725, 336 20, G01B 714, H01F 2102

Patent

active

055044271

ABSTRACT:
Several embodiments of a rotational position sensor having a variable coupling transformer are disclosed. Each sensor employs at least one magnetically permeable transformer core and a primary and secondary coil. The primary coil in coupled to a time varying electrical signal and is mechanically coupled through a transmission to a rotatable shaft whose position is to be measured. As the shaft is rotationally displaced, the primary coil changes orientation thereby changing an output signal induced in the secondary. A detector is coupled to the secondary coil to monitor the output signal and correlate the signal to the shaft's rotational displacement.

REFERENCES:
patent: 4631478 (1986-12-01), Knetsch et al.
patent: 5367256 (1994-11-01), Cooper et al.

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