SU381877A1 - ANGULAR DISPLACEMENT SENSOR - Google Patents

Description

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This invention relates to automatic control and regulation systems.

Angular displacement sensors are known that contain a U-shaped magnetic core, on the poles of which the primary winding is located, and a frame secondary winding fixed cantilever on the end face of the 1TD rotary and located in the gap between the poles of the U-shaped magnetic circuit and the magnetic conductor plate mounted against the poles.

The described device is characterized in that the end surfaces of the U-shaped magnetic circuit 1 of the frame secondary winding are made in the form of annular sectors.

This implementation has increased the sensitivity of the device.

The drawing shows schematically the described sensor.

It contains a U-shaped magnetic circuit L at the poles of which the primary winding 2 is located, a magnetic conductor plate 3, a secondary frame winding 4 fixed cantilever at the end of the rotary shoe 5. The secondary secondary winding 4 is placed in the gap between the poles of the U-shaped magnetic conductor / and the magnetic conductive plate 3. The poles of the U-shaped magnetic circuit and the secondary frame winding are made in the form of ring sectors, and the angle of rotation and the frame secondary winding is determined from the ratio:

„- This (

where p is the central angle formed by the outer lateral sides of the poles of the magnetic circuit /;

y is the central angle formed by the sides of the frame secondary winding 4.

The axes of the sides (active parts) of the winding 4 at the initial moment of time coincide with the axes of the poles of the magnetic circuit.

The principle of the angular displacement sensor is as follows. The two halves of the primary winding 2 are connected in series in accordance with (or in parallel in accordance with) and create a summing magnetizing force. The neutral (zero) polarization of the moving secondary winding 4 of the sensor is its symmetrical position relative to the magnetic circuit /. In this position, the total magnetic flux penetrating the winding 4 is zero.

When the secondary winding 4 is moved, for example, to the left, the flow in the left part of the magnet circuit / increases and decreases in the right part. As a result, the total flux penetrating the secondary winding 4 becomes non-zero, and an emf is induced in the winding. When moving the secondary winding to the right of its emf. will change the phase to the opposite. Since the movement of the secondary winding 4, having a form similar to the shape of the poles of the magnetic rod /, occurs in a uniform magical field and the active sides of the winding 4 do not extend beyond the floor, the scattering flows are extremely small, the increment of the coupling coefficient between the primary and secondary windings the angle of rotation is constant and has a maximum value, since the air gap is reduced to the minimum value.

As a result, a linear characteristic of the output voltage was obtained, while simultaneously increasing its range and the increasing value of the coefficient due to the excitation winding and the secondary coil, which led to an increase in its sensitivity and output power.

Subject invention

An angular displacement sensor containing a U-shaped magnetic core, on the poles of which the primary winding is located, and a secondary frame winding fixed cantilever at the end of the rotary shoe and located in the gap between the poles of the U-shaped magnetic circuit and magnetic plate installed opposite the poles, characterized by that, in order to increase the sensitivity of the sensor, the end surfaces of the U-shaped magnetic circuit and the secondary frame winding are made in the form of ring sectors.

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