SU497688A1 - Induction position sensor magnetized object - Google Patents

Description

When power is supplied to the motor excitation winding, a working magnetic flux F occurs, which travels along the back and teeth of the motor stator through the technological air gap, IR core 1 and then branches: the part goes along the core axis I, the other part penetrates the core 1 perpendicular to its axis and through the air gap passes into the rotor of the engine, then through the working air gap passes through the core 1 and together with the part of the flow that passes along the axis of the core through the technological gap closes in the teeth and the back of the stator of the engine. The flow F passes along the axis of the core through the technological air gap, the teeth, the back, the teeth of the stator 7, the technological air gap and closes in the heat of the core. Part of the flow F passes through the rotor 8.

The portions of the sensor core 1 located above the depression are magnetized more, since both fluxes F and F in one direction pass through them. Along the sections of the core 1 of the sensor located above the protrusions, the fluxes F and F pass relative to each other at an angle close to K 90 More currents will flow along the taps from the winding parts corresponding to the more magnetized portions of the core. By the magnitude of the potential difference between identical points of the windings of the cores 1 and 2, it is possible to judge which part of the core 1 is above the depression ...;

To obtain information about which pole (L or 5) the plot is located

of the core, a constant current is applied to the winding 6, which creates a constant magnetizing flux F summed; ice or subtracted from the working flow F.

The core 2 can be made in the form of any voltage divider with any given distribution law between the taps. In this case, the voltages on the measuring elements will be functions of a mismatch in the distribution of the voltage on the winding of the core 1 and the predetermined voltage.

Subject invention

Claims (2)

1. An inductive position sensor for a magnetized object containing a ferromagnetic core with an alternating current winding distributed over its length, characterized in that, in order to improve accuracy and expand the scope of application, the sensor is provided with an additional ferromagnetic core with a distributed winding connected in parallel with the winding of the main core , and measuring elements, and on the coils of these windings are made along the entire length of the tap off with the same pitch, and each measuring element included m Between the respective taps of the main and additional sensor windings. 2. A sensor according to claim 1, differing in that the main core is provided with an additional dc winding winding to determine the direction of the magnetic flux. R / V 4g L / -I r.      Tl 1 I t S    P I R -v -u |