RU1823091C - Inductor pickup - Google Patents

Abstract

Usage: electrical engineering, information type electric machine, automation devices, SUMMARY OF THE INVENTION: An induction sensor comprises a winding gearless rotor and an out-pole stator 1 with a two-phase field winding and a generator winding and a phase discriminator 34. The stator tooth pitch is equal to the tooth pitch of the rotor. The poles of stator 2–9 have serrated ridges 10–17. Field coils 18 and 19, 20 and 21 span two poles and are connected in the opposite direction. The coils of the generator winding 22-29 are located at the poles 2-9 and are connected in series. The tooth ridges 10 and 14, 11 and 15, 12 and 16, 13 and 17 at the opposite opposite opposite poles 2, 6, 7, 4, 8, 5 and 9 are offset by half of the tooth division relative to each other. The tooth ridges of the same phase poles of one phase are offset by a quarter of the tooth division relative to each other. The tooth ridges of the same-named poles of the other phase are shifted by an eighth of the tooth division relative to the axis of their poles. One input of the phase discriminator is connected to the generator winding, the other to the field winding terminals. 3 ill. 18 SO y CA) o H) 8 Fig. 1 g

Description

The invention relates to electric machines of information type, which could be used in automatic devices as a speed sensor, a direction sensor and a position sensor.

The aim of the invention is to provide an induction sensor with enhanced functionality, capable of operating in the mode of measuring speed, direction of rotation and measuring small angular displacements in static, and reducing the complexity of manufacturing.

On Fig, 1 shows a cross section of an inductor sensor; in FIG. 2 is a circuit diagram of a field coil and a generator coil; in FIG. 3 - phase discriminator.

The stator 1 of the induction sensor has on its surface evenly spaced poles 2, 3, 4, 5, 6, 7, 8, 9, which have serrated combs 10, 11, 12, 13, 14,

15.16, 17. The tooth pitch of the stator is equal to the tooth pitch of the rotor. The coils 18 and 19, 20 and 21 of the two phases of the field winding simultaneously span two poles. At each of the poles 2-9 are located coils 22, 23, 24, 25, 26, 27.28, 29 of the generator winding. Teeth combs 10 and 14, 11 and 15, 12 and

16,13 and 17 at diametrically opposite opposite poles 2 and 6, 3 and 7, 4 and 8, 5 and 9, respectively, are offset relative to each other by half of the tooth division. Jagged combs, for example 10 and 11, of the same poles of one of the phases are offset relative to each other by a quarter of the tooth division, Jagged combs, for example 12 and 13, of the same poles of the second phase are offset relative to the axes of their poles by 1/8 of the tooth division in mutually opposite directions x, as shown in FIG. 1 by arrows A and B.

In FIG. 2 shows the connection diagrams of the coils 18, 19, 20, 21 of the field winding with the capacitor C and the coils 22-29 of the generator winding, on the terminals of which 30 and 31 there is an electric signal (Jr.

In the speed sensor mode, the field winding coils 18-21 are connected to a constant current source, and a signal with a frequency Z2T2 is present on the terminals 30, 31 of the generator winding. where Z2 is the number of teeth, fa is the rotational speed of the rotor.

In the rotation direction sensor mode, the field winding coils 18-21 are connected to an alternating current source with a frequency f. When the sensor rotor rotates clockwise with a frequency of f2. signal of the generator winding at terminals 30. 31

0

5

0

5

0

5

0

5

0

5

has a frequency equal to f - Z2T2, and when rotating in the opposite direction, this frequency is equal to f 2.2h - This gives information about the direction of rotation of the sensor rotor.

When the sensor is in the mode of measuring the angular position of the rotor, coils 18-21 are connected to an AC source, and the signal of the generator winding at terminals 30, 31 has a frequency and phase equal to

0) 1 - 2 Z2 O,

where 0 is the geometric angle of rotation of the rotor.

If the electrical signal Ur (w t - 2 Z2 of the generator winding is applied to the terminals 32, 33 of the phase discriminator 34. shown in Fig. 3, and to the terminals 35, 36, apply the supply voltage U (), then the discriminator output terminals 37, 38 there will be an electric signal, the magnitude of which will depend on the position of the rotor, determined by an angle of 0.

The inventive sensor has enhanced functionality.

The implementation of the sensor in the form of a single package, filled in an aluminum case, eliminates the mechanical processing of the package and the case at the interface, and thereby reduce the complexity of manufacturing.

Claims (2)

1. An inductor sensor comprising a non-winding gear rotor and an out-pole gear stator, on the poles of which an excitation winding and a generator winding are located and the tooth pitch of which is equal to the tooth pitch of the rotor, while the tooth combs of each two diametrically opposite opposite poles are displaced by one relative to the other half gear division, characterized in that, in order to expand its functionality and reduce the complexity of manufacturing, the number of stator poles is a multiple of eight, winding The excitations are made two-phase, the pole coils of the field winding simultaneously cover two poles of the stator, the tooth combs of each two adjacent poles covered by the coils of one phase of the field coil are displaced one relative to the other by a quarter of the tooth division, the tooth combs of each two adjacent poles covered by the coils of the second phase, are shifted relative to the axes of their poles by an eighth of the tooth division from mutually opposite directions, the coils of the generator winding are connected in series flax, and the coils located at two adjacent poles covered by each coil of the field winding are opposed. 2. The sensor according to claim 1, characterized rotor position in statics, it is equipped with a phase discriminator, one input of which is connected to the generator winding, and the other input is connected to the winding terminals in order to obtain information on 5 excitations. 2 .7. f j-2 je 27 / tl b -ppgh. LwЈ5 rgtpp bw. v {JL Ј5 rgtpp bmt. FIG. I v {JL l 38