SU1372514A1 - Rotor position sensor of thyristor motor - Google Patents

Abstract

The invention relates to electrical engineering, in particular to electrical machines. The aim of the invention is to improve the weight and size parameters. In the device, the position sensor is made as a separate element in the form of a sleeve of magnetically conducting material, not dependent on the coupling of the electric motor with the working mechanism, and is intended to be mounted on the free end of the shaft of the electric motor. The sleeve is made with a radial protrusion, on the cylindrical surface of which there are permanent magnets located under the sensitive elements. Bearing bushings are located on the same bushing. 1 hp f-ly, 3 ill. S

Description

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The invention relates to electrical engineering, in particular to electrical machines, and is intended for use in valve electric motors.

The purpose of the invention is to improve the overall dimensions.

FIG. 1 shows a rotor position sensor, a longitudinal section; in FIG. 2 - the same, cross section; in fig. 3 shows the node I in FIG. 2

The rotor position sensor is designed as a separate element, regardless of the method of coupling the electric motor to the working mechanism for a six-pole machine.

At the free end of the shaft 1 of an electric motor, a carrier sleeve 2 is installed, on which samarium-cobalt permanent magnets are placed 3, | which are held radially by a non-magnetic sleeve 4, and axially by a non-magnetic ring 5. Magnetic shunts 6 are installed at the ends of the permanent magnets to obtain the required steepness of the magnetic field. The magnets 3 are fixed at an angle of 120 by sectors 7 made of non-magnetic material.

In comparison with the known, the proposed rotor position sensor has a wider range of application.

The stator 8 of the position sensor rotor 30 reduced weight, dimensions and flow

120 ° y ..,

and the number of magnets is equal to the number of pole pairs of the motor.

The accuracy of the adjustment of the output signals of the sensor is made by turning the screws 12. The sensor stator is fixed relative to the frame of the electric motor using a spring bracket 14 and screw 15.

The rotor position sensor operates as follows.

If the permanent magnet 3 is against the magnet diode 13 with the screw 12, then the magnetic flux is closed, as shown in FIG. 1 through the magnetic diode 13, the screw 12, the stator 8 and the carrier sleeve 2. At the same time, the resistance of the magnetic diode increases 10-15 times. If a non-magnetic sector 7 is located against the sensitive element 13, then through the magnetic diode only a scatter flow closes, which does not cause a significant change in its resistance.

In comparison with the known, the proposed rotor position sensor has a wider range of application.

reduced weight, size and consumption

made of magnetically conductive material and mounted on two bearings 9 and 10. The inner race of the bearing 10 to eliminate heat from

the magnetic flux is fixed on a non-This allows it to be used with a magnetic sleeve 11, which is mounted on the bearing sleeve 2. The inner bearing race 9 is also located on the non-magnetic sleeve 4 mounted on the bearing sleeve 2.

any method of coupling an electric motor with a working mechanism. When the motor is molded by the coupling, the sensor is also located at the free end of the shaft. The proposed sensor is simple to manufacture and less time consuming compared to the known.

The screws 12c are screwed into the magnetic conductor stator 8 with sensitive elements, for example, with KD304 type magnetic diodes 13 glued with epoxy glue on the conical ends of the screws 12. The sensitive elements are shifted relative to each other by an angle / i:

, ,, 120,. (,-one)

for i 1-3;

50

,,. i.p-2.5) f:

for i 1-6,

Where

1 number of sensitive element

p is the number of pairs of poles. The central angle of the permanent magnets is determined by the formula

magnetic material of permanent magnets, as well as cost. The proposed sensor is made as a separate element of a valve motor.

This allows it to be used when

any method of coupling an electric motor to a working mechanism. When articulating an electric motor with a clutch, the sensor is also located at the free end of the shaft. The proposed sensor is simple to manufacture and less time consuming compared to the known.

Claims (1)

1. A rotor motor position sensor, comprising a rotor of the sensor, rigidly connected to the motor shaft, a stator with conical screws installed in it, at the ends of which sensitive elements are fixed, for example magnetic diodes, permanent magnets in the form of radially magnetized ring sectors with magnetic shunts at the ends, two radial bearings, with the permanent magnets arranged radially under the conical screws, characterized in that. /four /, Fig 2 9 12 s Phi2. five