SU1432675A1 - Multiple-pole rotary transformer - Google Patents

Abstract

The invention is related to electrical machines of automatic systems and computing and can be used to create multi-pole rotating transformers (BT), phase shifters and other information machines. The aim of the invention is to improve accuracy by reducing the non-perpendicularity of the quadrature sinusoidally distributed windings. The VT contains a magnetic core that carries blue-coupled distributed quadrature windings with the number of pairs of poles p, with the number of teeth Z, not a multiple of the number of pairs of poles. The number of turns of sections of one quadrature winding is satisfactory 2 em to the ratio | Z. W. cos p cf () tg f / 2, and the other quadrature winding ratio. I EWJ sin Pel; U i: f () tg f / 2, where i is the number of the teeth of the magnetic circuit; the maximum number of turns of one winding covering one tooth of the magnetic circuit; “T- is the angle between the origin of the angles and the axis of the i-ro wave; W; and W is the number of turns covering the i-th prong, respectively, of the first and second quadrature windings; Г- permissible value of non-perpendicularity of quadrature windings. 2 ill., 2 tab. (L 4i 00 f SP

Description

The invention relates to electrical engineering and can be used to create high-precision electrical information systems.

The aim of the invention is to improve the accuracy by reducing the error due to non-perpendicularity of the quadrature windings.

FIG. Figure 1 shows the basic design of a multi-pole rotating transformer (VT); in fig. 2 is a diagram of the performance and mutual arrangement of one pair of quadrature windings.

The multi-pole VT consists of coaxially arranged stationary stator housing 1 (Fig. 1), a magnet carrier 2 and a rotary rotor case 3 carrying the magnetic core 4. The windings 5 are placed on the magnetic cores 2 and 4 of the stator and the rotor.

One or both magnetic circuits 2 and 4 have teeth not multiples of the number of pairs of poles of a multi-pole VT and carry on themselves two quadrature (shifted in position on the magnetic conductor).

90 s

on hail) sinusoidal distribution

divided windings. In this case, we assume that both magnetic circuits have numbers of teeth that are not multiples of p.

According to the day's theory of calculating sinusoidally distributed windings, the number of turns in the sections enclosing the teeth of the magnetic conductor should be determined for the first quadrature winding.

W. .W | sin p

(one)

and for the second quadrature winding

WI W cos p with /

(2)

de w

with (. P

,, w;

the maximum number of turns of one winding, covering one tooth; the angle between an arbitrarily specified reference angle for calculating the distribution of the windings and the axis of the i-th wave;

the number of pairs of poles; the number of turns covering the i-th prong, respectively, of the first and second quadrature windings.

When calculating the windings, the origin of the reference angles c1- on the bore of the magnetic conductor can be set arbitrarily, but the laws of the distribution of quadrature windings will be different, which leads to the inequality of the electrical parameters of the quadrature windings. Therefore, the origin of the angles is set so that the axis of the first tooth is from the specified origin of the angles

45 at an angle of 45 el.grad (o ().

In this case, the parameters and laws of the winding of quadrature windings are the same and the values with / are determined by the expression

17 21

., -, (i-0

(3)

where Z is the number of teeth of the magnetic circuit carrying the quadrature

windings.

When calculating BTs, the obtained W values are. and W. rounded to whole numbers and then winding patterns are made.

However, when rounding the calculated values to integers, the sinusoidal distribution of the numbers of turns of the windings is disrupted and therefore the specified positions of the winding axes are offset from the calculated position. This leads to non-perpendicularity of quadrature windings.

In this multipolar VT, when rounding off the calculated values of the numbers of turns, covering the teeth of the magnetic conductor, the turns of the first quadrature winding should satisfy the relation

| Zw. cos RS /. (/ - --- 5- tg -f,

U (Z /

(four)

a second quadrature winding - ratio

Z W; sin p I /

W z f

tg -2- (5)

where cf is the permissible non-perpendicularity value of the quadrature windings.

3 14326 If the numbers of the teeth of both magnetic conductors are not crrtated to the number p, then these relations must be fulfilled both for the stator windings and for the rotor windings.

When fulfilling relations (4) and (5), the non-perpendicularity of the axes of the quadra75

The allowable value of the values of these sums for a given value of 2kl.s should be equal to

tg

lOOjij S 2

tg 1

 O.OZBA.

The current windings do not exceed the values of f. When relations (4) and (5) are fulfilled, their left sides should tend to approach zero, however, it is impossible to practically achieve absolute equality due to the fractional values of sines and cosines of specific angles,

example. Let the magnetic circuit on which a pair of quadrature windings is placed. Has a number of teeth z 15, a number of pole pairs p 4, the maximum number of turns covering a tooth of the W 100 magnetic circuit, perpendicular to the windings of SG 2 angle s are acceptable.

The calculation of the winding law without taking into account the main difference of the invention for the first quadrature winding using the expressions (1) and (3) is given in Table. 1 (columns 1-5), and for the second quadrature winding using the expressions (2) and (3) are given in Table. 2 (columns 1-5). In column 5 of table. 1 and 2 given the calculated data of the rounded numbers of turns, covering the teeth of the magnetic circuit. Thus, quadrature sinusoidally distributed windings were performed at the known device.

To verify their compliance with the new distinctive features in the table. 1 and 2, columns 6 and 7 are introduced, according to the data of which it is possible to determine the sums constituting the left sides of inequalities (4) and (5). The left-hand sides of equalities (4) and (5) are defined as the sums of the values of the numbers given in columns 7 of the table. 1 and 2.

For the above calculation, these amounts are

Z

I i-1

1 W. cos p o (-0.48153;

2

Z w sin po (, 0.481531

i: 1

one

ten

0

five

0 5

Consequently, the obtained values of the sums of the left-hand sides of inequalities (4) and (5) do not satisfy the given value of cf, and they correspond to a non-perpendicularity of 265 angular seconds.

In order to ensure equalities (4) and (5), the values of the numbers of turns covering the magnetic conductor should be adjusted, for example, for the first winding: instead of Wo-84, take Wg -85, instead of W 93, take W (j 94, instead of W t 36 accept W, 35, instead of W 89 accept W, W 90; for the second quadrature winding: instead of Wg 89 accept Wg 90, instead of W 1C 36 accept W, a 35, instead of 93 accept W 94, instead of W

nineteen

 -84 accept w jg -85.

0

five

0

five

After making these adjustments, we get

2

I Z W. COS 0,003033 1 I

0.00364;

one

 T. W / sin po (J 0.003033

 0.00364.

Thus, the non-perpendicular errors of the proposed quadrature windings are reduced compared with the known ones by approximately 160 times.

The transformer works as follows.

When applying to one of the quadrature windings of one of the magnetic conductors (for example, a rotor), the alternating current supply voltage on the quadrature stator windings, depending on the angular position, from the rotor is applied a voltage proportional to z1pro (isosro). Another quadrature winding of the rotor at the same reference point of the reference angles / on the stator windings is subjected to voltage proportional sin p (s / - -90) and cos p ().

Multi-pole VT can work even when powered by the stator windings, then the rotor windings will be output and similar dependencies will be solved. The invention, at no additional cost, reduces the non-perpendicularity of the axes of the quadrature windings and thereby increases the operational accuracy of the CW. Since the error from the non-perpendicularity of the quadrature windings is fully manifested in any mode of use of the VT, its reduction leads to a significant increase in the accuracy of the VT.

Formula of Invention

A multi-pole rotary transformer containing a magnetic core with a number of teeth Z, not a multiple of the number of pole pairs, carrying sinusoidally distributed quadrature windings with a number of pole pairs p, executed in the form of sections covering the teeth of the magnetic circuit, so as to increase the accuracy by reducing errors from non-perpendicular quadrature

sinusoidally distributed windings, the number of turns of sections of one quadrature winding satisfy the ratio

I L W,. cos p c, i. 5- tg -f

a second quadrature ratio

2

Zw. sinp with, | four

1Ejnf

5 o

where 1

0W

m

d; numbers of teeth of the magnetic conductor;

the maximum number of turns of the section covering one tooth of the magnetic circuit; the angle between an arbitrarily specified reference angle for calculating the distribution of the windings and the axis of the i-th wave;

Wj, W | - the number of turns of the sections covering the i-th column of the first and second quadrature windings, respectively; permissible non-perpendicularity of quadrature windings,

Table. one

P

Continuation of table 1

XXXXXXXi

x xTyxxyx

jf

CZZZZZZ

71 63 -65 -45 9. 26 -99 -5 100 -16 -97 35 SO -54 -78

TPPVPLPLPRLLPG

jHHyyHHyyHyyHHy

7i -78 -54 so 35 -S7 f6 100 -5 -99 26 fflf -W -85 63

RRLRgPPPLLLL / RRLLL 5

 1 in ff fU 11 12 fS fit fS 15 ft f8 13.

chssnshnshnnyuu

- /

g

j

5 5

Claims (1)

Claim A multi-pole rotary transformer containing a magnetic circuit with the number of teeth z, not a multiple of the number of pairs of poles, carrying sinusoidally distributed quadrature windings with the number of pairs of poles p, made in the form of sections covering the teeth of the magnetic circuit, characterized in that, in order to increase accuracy by reducing the error of non-perpendicularity kvadratur6 GOVERNMENTAL sinusoidally distributed winding, the number of turns of one quadrature coil sections satisfy the relation _r | Σ. W. cos pcij ί -Ηΐη-Ξ_ tg ~ -, and the second quadrature winding - to the relation IS ' ^L --2-- ^ts -l · ¹ where i' are the numbers of the teeth of the magnetic circuit; 20 - the maximum number of revolution sections covering one tooth of the magnetic circuit; d- is the angle between an arbitrary given reference point of angles when calculating the distribution of the windings and the axis of the i-ro tooth; W., W · '- the number of turns of sections covering the i-th scar, respectively · 30 of the first and second quadrature windings; - the permissible value of the non-perpendicularity of the quadrature windings. I a b l and a. 1 - “η g. -to. " - ~ ™ “.“ - ““ - Μ ” "To" - Prongs i The angular position of the axis of the tooth, el. grad, 4 ^ sin 4 (/ - The number of turns covering the tooth; cos 4 "ij W · cos 4 oC estimated 100 sin 4 ot; rounded ^w i 1 45 0.707106 70.7  71 0.707106 50,204597 2 141 0.629321 62.9 63 -0.777146 -48.960198 3 237 -0.83867 -83.9 r-84 -0.544639 -45.749676 4 333 -0.453991 -45.4 -45 0.891007 -40,095315 5 69 0.933580 93,4 ⁹³ 0.358368 33,328224 6 165 0.258819 25.9 26 -0.965926 -25.1114076 7 261 -0.987688 -98.8 -99 -0.156435 15,493005 8 357 -0.052336 - 5.2 - 5 0,998630 - 4,9.9315 9 93 0,998630 99.9 100 -0.052336 - 5,23362 Continuation of table 1 Battlements i The angular position of the axis of the tooth, el. grad, 4 <ή sin 4d- The number of turns covering the tooth cos 4s ( _; W cos 4 d; estimated 100 sin 4 ol rounded W. 1 10 189 -0.156435 -15.6 -16 -0.987688 15,803008 eleven 285 -0.965926 -96.6 -97 0.258819 -25.105443 12 21 0.358368 . 35.8 36 0.933580 33,60888 thirteen 117., 0.891007 89.1 8'9 -0.453991 -40.405199 14 213 -0.544639 -54.5 -54 -0.838670 45,28818 fifteen 309 -0.777146 -77.7 -78 0.629321 -49.087038 table 2 Battlements The angular position of the axis, city 4 <- soy 4 "ί _; The number of turns covering the tooth sin 4Λ. W ^r . sin W. IT estimated 100 cos 4οί; rounded Wi 1 .45 . 0.707106 70.7 71 0.707106 50,204597 2 141 -0.777146 -77.7 -78 0.629321 -49.087038 3 237 -0.544639. -54.4 -54 -0.838670 45,28818 4 333 0.891007 89.1 89 -0.453991 -40.405199 L 69 0.358368 35.8 36 0.933584 33,60888 6 165 -0.965926 -96.6 -97 0.258819 -25.105443 7 ²⁶¹ -0.156435 -15.6 -16 -0.987688 15,803008 8 357 0,998630 99.9 100 -0.052336 - 5,23362 9 93 -0.052336 - 5.2 - 5 0,998630 - 4,99315 10 189 -0.987688 -98.9 -99 -0.156435 15,493005 eleven 285 0.258819 25.9 26 -0.965926 -25.1114076 12 21 0.933580 93,4 93 0.358368 33,328224 thirteen 117 -0.435991 -45.4 -45 0.891007 -40,095315 14 213 -0.838670 -83.9 -84 -0.544639 45.749676 fifteen 309 - 0.629321 62.9 63 -0.777146 -48.960198 •4 Fig!