SU1529362A1 - Multipole rotary transformer - Google Patents

Abstract

The invention relates to electrical machines of automatic systems and computer technology and can be used to create highly accurate information electrical machines. The aim of the invention is to improve the accuracy of multi-pole rotating transformers (BT). Multi-pole VT contains rotor and stator magnetic cores with sinusoidally distributed windings. The number of teeth of the rotor magnetic cores Z ₁ and the stator Z ₂ satisfy the relation Z ₁ -Z ₂ = ± P, where P is the number of pole pairs. 2 Il.

Description

(21) 4395742 / 24-07: (22) 03.22.88 (46) 12.15.89. Bml 46 (72 V.P. Leonov and A.I. Milyukov

(53) 621.313.334: 654.94 (088.8)

(56) USSR Copyright Certificate No. 299919, cl. H 02 M 5/32, 1969.

USSR Author's Certificate No. 418929, class H 02 K 24/00, 1972.

(54) MULTIPLE-ROTATING ROTATING TRANSFORMER

(57) The invention relates to electric automatic systems and computer technology and can be used to create highly accurate information electric machines. The aim of the invention is to increase the accuracy of multi-pole rotary transformers (BT). The multipolar VT contains the rotor and stator magnetic cores with sinusoidally distributed windings. The numbers of teeth of the rotor 2 magnetic wires and the stator z satisfy the ratio z, - z p, where p is the number of pole pairs. 2 nl.

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

The purpose of the invention is to improve the accuracy by completely suppressing the primary and secondary windings in mutual induction along one of the two lowest spatial harmonics in the magnetizing forces (NS) of the windings and the rotor and stator of the order Z) - p and z + p or Z, + P and, . where z, and z. - the number of teeth of the rotor and stator magnetic cores; p is the number of pairs of poles.

FIG. 1 shows the construction of a multi-pole rotating transformer (BT); FIG. 2 - its basic electrical circuit.

The multipolar VT consists of coaxially arranged stationary housing of the stator 1, carrying the magnetic circuit 2, and rotary housing 3 of the rotor carrying the magnetic core 4. On the magnetic wires 2 and 4 of the stator and the rotor are placed two quadrature .) winding with the number of pairs of poles p. FIG. 2 denotes windings 5 and 6 of the rotor and windings 7 and 8 of the stator.

All windings are sinusoidal but distributed. The number of teeth of the magnet assembly 2 (z) of the stator and the magnetic conductor 4 (z,) of the rotor can be any value, but must satisfy the relation

W

z - z ip

(one)

SP

WITH

CD CO 9) N9

How: known from the theory of VT, in the NS of Sinusoidally distributed windings, the lowest spatial harmonics are the harmonics z ±. p, where z is the number of teeth of the magnetic circuit carrying the windings, i.e. in the proposed device; In the NA of the rotor windings, the lowest harmonics are Zf - p p, and in the NA of the stator windings, the lower harmonics are Z - p W Zf + p.

The fulfillment of relation (1) ensures, regardless of the accuracy of the sinusoidal distribution of the windings, poln

e) suppression of one rotor and one s of the atoristic of the two lowest available phmonics, i.e. with Z. - Z,

p suppressed

l) | harmonics z, -rg + p, and msh Z, -Zj-p are harmonized to Z, + p and z, - p, 10

To suppress the harmonic of K in the NA, it must be equal to zero a

coefficients in the distribution curve of the NA along the air gap, which is achieved b

the property

i F (about) cosKoLd (L

 F (o6) sinKoido6

ir

..,four

Z.

I w; cosKctdut

 / tg.

ri

I I; sinKotdo (;

.

In f (4) factor si

KG

to

dp rotor takes the form

dp stator - type sinK

At z z, 2 p in the rotor winding, regardless of the law of distribution of the windings on the teeth, the harmonic z + p is completely suppressed, since

8 in

(za. + p)

 sin i Oh,

4 in the stator windings, the harmonic z – p is completely suppressed, since

(

Zi

 A l

 S in and o

; With Z - Zg - p In the windings of the rotor, regardless of the distribution law of the mains, the harmonic current is completely suppressed.

. sin s- o

Z

- in the stator windings, the harmonic z + p is fully suppressed | 1, since

:. (z, + p): g.

gin sin1r o

 Since the sines of the angles that are multiples of j. (Also equal to zero, completely suppress. Since the turns of each winding are connected in series and the same current flows through them (I), the distribution of the NS is proportional to the distribution of turns on the teeth of the magnetic conductor. FCfti function) can be represented as a stepped curve. The values of this function against the tooth of the magnetic circuit i

F; (o6) Iw;

(3)

where w, j is the number of turns covering the i-th wave of the magnetic circuit.

Substituting (3) into the left-hand parts of equality (2) and completing some transformations, we obtain

2l8lnK-g- 4-,;

-

(four)

2lsinK |: D-. . 2 sinKoi;

0

five

0

five

0

five

c and harmonics, multiples of suppressed harmonics.

Shogopolar; BT works as follows.

When applied to one of the quadrature windings of the power supply rotor, the output windings of the stator depending on the angular position oi of the rotor are subjected to voltage proportional to sinp about and sozrob. When the supply voltage is applied to the other (square, turn) rotor winding at the same reference point, the voltage oi on the stator windings is proportional to ginp (06+ 90 °) and cosp (° C + 90 °).

Multi-pole VT can also operate when powered by the stator windings, then the output windings are rotor windings. In the proposed VT, in the output voltages along one of the two lower spatial harmonics and their multiples are excluded from the sinusoidally distributed harmonics in the NA spectrum. At the same time, the destruction of these harmonics does not depend on the accuracy of the sinusoidally distributed windings, which allows optimizing the distribution of windings for better suppression of other winding harmonics.

Claims (1)

Invention Formula A multipolar rotary transformer containing rotor and stator magnetic cores with sinusoidally distributed windings, is designed so that, in order to improve accuracy by completely suppressing in mutual induction of the primary and secondary windings in one of two Low UHH / X Y VWX X 1 spatial harmonics, in magnetizing forces of the rotor windings and stator Zf p and Z. or 7.4 + rig, where z, z the number of teeth of the magnetic stator and rotor; p is the number of pairs of poles, the number of teeth of the rotor and stator magnetic cores satisfy the relation 10 Z, - g: 2. + p. C ( Lh FIG. g