SU381891A1 - ROTARY INDUCTION SENSOR - Google Patents

Description

one

This invention relates to automatic control and regulation systems.

Known rotary induction sensors containing primary and secondary windings, located on a dielectric or ferromagnetic disks.

The described device is distinguished by the fact that in it the primary winding is made of a multilayer one with the front connections of conductors shifted in each layer by one pole division.

Such an implementation of the primary winding allowed reducing the influence of loop currents in frontal connections on the magnitude and shape of the output signal and increasing the accuracy of the sensor operation.

The drawing shows a schematic representation of a two-layer primary winding.

Structurally, the rotary induction sensor is made in the form of two disks of dielectric or ferromagnetic material arranged in parallel.

Wires, which are a series of radial (active) plates-conductors connected alternately, at the center, then at the periphery along the contour of the disks, are printed on adjacent surfaces of the disks.

If voltage is applied to the primary winding, then the secondary voltage will be

e. D. s., which is a function of the angular position of the disks. Ed with. in the secondary winding is induced both by the inductive coupling between the radial conductors of the primary and secondary windings (the useful signal), and by the inductive coupling between the front connections. The electromotive force, induced by the contour currents of the primary winding, does not depend on the relative angular content of the disks, is added or subtracted from the periodically varying useful signal from the radial conductors, causing a methodological error in measuring the relative angle of rotation of the induktoshin disks.

To eliminate the influence of the loop currents of the primary winding on the magnitude and shape of the output signal, two-layer windings are located on the sensor disks with shifted

one pole division of the frontal connections (see drawing). The bilayer windings are connected in such a way that the currents in the upper and lower layers along the contour of the disk flow in opposite directions. Wherein

The currents in the paired radial conductors coincide in direction, and in the frontal connections of the adjacent radial conductors are pairwise directed in opposite directions. In the most general form, the sensor may contain multi-layer printed windings.

3

The proposed induction sensor allows to significantly reduce the induction in the air gap of the magnetic field from the loop currents, without resorting to the complexity of the winding circuit, and to improve the accuracy of angle measurement using such a sensor. In addition, the use of double-layer windings will reduce the thickness, ins conductors and energy loss due to the reduction of eddy currents and the surface effect.

Subject invention

A rotary induction sensor containing primary and secondary: windings located on dielectric disks, characterized in that, in order to improve the accuracy of the sensor, the primary winding is made of multilayer with frontal p-conductors shifted in each layer by one pole division.