SU1185512A1 - Multiple rotary transformer - Google Patents

Abstract

A MULTIPOLUS ROTATING TRANSFORMER, containing a magnetic core with a sinusoidally distributed winding, the conductors of which are installed in the grooves of the magnetic core, the number of drug poles of which has a different common multiplier m with the Y number /////////// of the magnetic grooves, differing the fact that, in order to increase accuracy, in each group of grooves mixed at the corners among themselves, multiples of the conductors Wj are determined by an expression rounding to an integer ,,, - msina, -, where j is the number of the group of grooves; i is the number of the first groove of the j-th group of slots; a, is the angle from an arbitrarily chosen reference point to the i-ro groove. in electrical degrees; W ,,, - is the maximum possible number of conductors in a groove, and the difference in the number of conductors in any of the group slots is no more than one. (O (L s 2 / j / //

Description

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The invention relates to electrical machines of automatic systems and computing, in particular, to rotating transformers (BT).

The purpose of the invention is to improve accuracy.

The drawing shows a schematic structural diagram of a multi-pole VT.

Multipole W contains a magnetic core of the stator 1, located in a stationary housing 2, and the magnetic core of the rotor 3, placed on the shaft 4. The magnetic circuits of the stator and the rotor have grooves on the side of the air gap between them. An excitation winding is laid in these slots on one of the magnetic cores (stator or rotor). On the other magnetic circuit two quadrature output windings are laid, the axes of which are shifted by 90 el. hail. Each of the magnetic cores (or only one of them) has a sinusoidally distributed winding in its grooves, the number of pole pairs P of which has the largest common factor t with the number of slots of the magnetic circuit Z.

In a given VT, in one or several slots of the magnetic conductor, which are displaced among themselves by angles, multiples, °, the numbers of conductors of the sinusoidally distributed winding are not equal to each other and differ by one. The distribution of the sums of the number of turns in the groups of grooves mutually offset by the angles is a sinusoidal law.

This device is shot using the example of a multi-pole VT with the number of pole pairs and the number of slots of one of the magnetic cores (stator or rotor) carrying a sinusoidally distributed winding equal to. For this example, the greatest common factor of the numbers P and Z is.

282.84283

-62,5662

-181,60182

356.40356

395,08395

In this multipolar VT, the total number of turns located in the slots mutually offset by the corners is proportional to the sine of these angles with an accuracy of rounding.

 In tab. 1 shows an example of determining the number of conductors in the slots of a given multi-pole VT.

The total numbers of conductors in the slots mutually shifted by angles are distributed over the repeating winding parts so that they do not differ from each other by more than one conductor (Table 2).

The device works as follows.

When the excitation winding is connected to a power source, an EMF is induced on one output 5 winding, proportional to the sine of the rotor angle, and on the other output winding - proportional to the cosine of the rotor angle.

Comparison of rounding errors b, - in Q of each group, including grooves mutually offset by ° for the known and proposed rotating transformer, shows that the rounding accuracy of the total number of turns in the same type of slots of the repeating winding parts in this 5 device is 2.5 11 times higher than in the known.

Since the main indicator of the accuracy of rotating transformers — a sinusoidal change in the output voltage — directly depends on the accuracy and accuracy of the sinus distribution of conductors in the grooves, this multi-pole VT has several times less error in reproducing the sinus output signal versus rotor angle than the known VT . However, the accuracy of the mutual arrangement of the axes of the quadrature windings is improved.

Table 1

0.16 0.56 0.40 0.40 0.08

table 2

Claims (1)

MULTI-SLEEP ROTATING TRANSFORMER, containing a magnetic circuit with a sinusoidally distributed winding, the conductors of which are installed in the grooves of the magnetic circuit, the number of pairs of poles of which has a different greatest unity factor m with the number of grooves of the magnetic circuit, characterized in that, in order to improve accuracy, in each group of grooves, offset from each other by angles, multiple of the number of conductors Wj is determined by the expression rounded to the nearest integer W / = W „, - msina, ·, where j is the number of grooves group; i is the number of the first groove of the j-th groove group; a, is the angle from an arbitrarily chosen reference point to the i-ro groove, in electrical degrees; W „, is the maximum possible number of conductors in the groove, and the difference in the number of conductors in any grooves of the group is not more than one.