Apparatus for measuring electromagnetic values of a coil, in par

Details Apparatus for measuring electromagnetic values of a coil, in par Apparatus for measuring electromagnetic values of a coil, in par

1988-12-06

1990-08-21

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420722, 32420724, 324655, 340686, 361170, G01B 714, H01H 4700, G01R 2726

Patent

active

049509853

ABSTRACT:
An apparatus for measuring the electromagnetic values of a coil, in particular for measuring the position of the armature of a coil/armature magnetic system includes a capacitor connected parallel at an arbitrary location to a supply line for the coil so as to define a parallel resonant circuit containing inductance of the coil and capacitance of the capacitor. An exciting frequency is introduced into the parallel resonant circuit by a transducer which is connected to the supply line. In addition, an evaluation instrument is connected to the supply line for determining the resonant frequency of the parallel resonant circuit and thus the position of the armature of the coil/armature magnetic system.

REFERENCES:
patent: 3477018 (1969-11-01), Richardson et al.
patent: 3789876 (1974-02-01), Kempton et al.
patent: 3851242 (1974-11-01), Ellis
patent: 4284961 (1981-08-01), Landau
patent: 4809742 (1989-03-01), Grau
patent: 4835471 (1989-05-01), Kutilin

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