SU547004A1 - Multi-pole sine-chassis rotary transformer - Google Patents

Description

one

The present invention relates to the field of electrically low-power machines and can be used in automatic control and regulation systems as elevated angle sensors.

Multi-pole sine-cosine rotary transformers are known that contain two magnetic systems (1). In such devices, the quadrature output windings are located on magnetic cores belonging to different magnetic systems, which eliminates the mutual influence of the output windings and improves the accuracy of the device.

A disadvantage of the known device is the large axial dimensions and complexity of the design.

Also known multi-pole sine-sinus transformer, containing two magnetic cores with uniformly distributed grooves. A primary winding is located in the slots of one magnetic core, and two quadrature output windings of the transformer (2) are laid in the slots of the other.

A disadvantage of this device is the presence of harmful electromagnetic coupling between the output quadrature windings, since they are placed in the same grooves of the magnetic circuit. When loads are connected to the output windings, this connection appears as additional currents in the output windings.

2

and causes an error in operation in the form of displacement of the numerical positions of the output voltage and distortion of the sinusoidal law of the RELIEF voltage when the rotor turns.

To improve the conversion accuracy by eliminating electromagnetic coupling by the output quadrature windings in the proposed transformer, groups of sections of the output quadrature windings are arranged in separate grooves in an alternating sequence, moreover, when the number of slots of the magnetic circuit carrying the output windings is a multiple of the number of pole pairs of the rotating transformer, the number of groups of sections of each winding is selected in accordance with the ratio:

I

where l is the number of groups of sections;

/ g 1,2,3,

p is the number of pole pairs of a rotating transformer.

FIG. 1 shows a schematically described transformer; in fig. 2 is a schematic for stacking the quadrature output windings of a rotating transformer.

The rotating transformer contains two magnetic circuits 1, 2 with evenly distributed slots (Fig. 1). In the slots of one of

they, for example, I, installed in a fixed case 3, placed the primary winding 4, and the grooves of the other, for example 2, laid quadrature output windings.

Each square winding is made in the form of sections of sections successively interconnected. FIG. Figure 2 shows the distribution pattern of quadrature winding section groups for the number of magnetic slots equal to. As follows from the drawing, the group of sections 5 belonging to the first quadrature winding and the group of sections 6 belonging to the second quadrature winding are laid in different grooves with alternating sequence, namely, the first six grooves are occupied by the group of sections 5 of the first output winding, the last six grooves are occupied group 6 sec of the second quadrature winding, and so on.

The numbers of conductors of the output windings are chosen in proportion to the sines of the angles between the given origin of the angles and the axis of the corresponding groove.

Thus, for one of the quadrature windings, for example, the sine number of conductors Wi in the f-OM slot DOLL4NO is determined by the relation:

G360 ° 360 ° I

} + p - + (i - 1} p -7-J,

W

where p 4 is the number of pairs of poles, is the number of slots in the magnetic circuit, i is the number of the groove.

The number of conductors of the second quadrature winding, cosine, is determined at the same angle reading in accordance with the relation:

G360 360 ° -1

 45 ° + P + (P T

Setting the origin of the angle with the sinusoidal distribution of the windings can be arbitrary. However, in order to obtain a convenient form of distribution of the frontal parts and to obtain the same parameters of the output windings, the reference point is chosen so that the position of the angle corresponding to 45 ° falls on the axis of one of the manholes of the magnetic conductor. With this choice of reference, the output windings of a rotating transformer have the same combinations of numbers of conductors in the slots, which ensures the same parameters of these windings, and consequently, high conversion accuracy.

A multi-pole rotating transformer can be made to any given number of pole pairs and with arbitrary number of slots. It can also work in mode

phase shifter In this case, the quadrature windings located on the magnetic core 2 perform the function of the excitation winding, and the primary winding performs one of the windings located on the magnetic core 1.

Claims (2)

1. Multipole sine-cosine rotary transformer containing two magnetic cores with uniformly distributed grooves, in the grooves of one of which the primary winding is laid, and in the grooves of the other two quadrature output windings are made in the form of sequentially distributed interconnected section groups, t and h and y with the fact that, in order to improve the accuracy of the transformation, the groups of sections of quadrature windings are arranged in separate grooves in alternating sequences. 2. A transformer according to claim 1, characterized in that when the number of the magnetic core slots carrying the output windings is a multiple of the number of pole pairs of the rotating transformer, the number of groups of sections of each quadrature winding is selected in accordance with the relation: fl, 2 / where n is the number of groups of sections, /% 1,2,3 ...., / 5 is the number of pairs of poles. Sources of information taken into account during the examination: I. USSR Copyright Certificate No. 276239, M. KL.2N 02K 24/00, 1969. 2. Authors certificate of the USSR 382203, M. kl.N 02K 24/00, 1970 (prototype). i miirfi tm (ml I) 2 3 5 b 7 5 5 7 (- - fby4dU 4-05 ° five / J No. 15 IS n in 13 SO 21 22 23 four ms