SU1436211A1 - Multipole rotary transformer - Google Patents

Abstract

The invention relates to electric machines of automatic systems and computer equipment and can be used to create multi-pole rotating transformers (BT), two-offset rotating transformers and other informational electrical machines. The aim of the invention is to improve the accuracy. Multi-pole VT contains a stator and a rotor, one of which has a magnetic wire with a number of teeth, a multiple of the number of pole pairs, and a tooth-pole winding. and the other has a magnetic core with a number of teeth, not a multiple of the number of pole pairs, and two sinusoidally distributed windings. The number of teeth of a magnetic circuit carrying sinusoidally distributed windings is a multiple of 15, and the number of turns in sections of sinusoidally distributed windings W spanning the teeth of a magnetic supply (where j is the number of the tooth) satisfy the ratios L W +. + (Z / 3) (i-I) and the relations SI Wp + i -1 + (Z / 5) (), where i is variable summation; Z is the number of teeth of the magni g of the conductor carrying sinusoidally distributed windings; 1 1,2, ..., Z / 3 and li 1.2, ..., Z / 5; (Z / 3) (i-l) and Ij + (Z / 5) (i-1) are the numerical values of the tooth numbers. In this VT, the influence of harmonics 3p, 5p, multiples of harmonics is excluded. 3 ill., 1 tab. (L with:

Description

four

about: a

N)

The invention relates to electrical engineering and can be used when comparing high-precision electrical information machines, namely rotating transformers (W).

The purpose of the invention is to float by completely suppressing in the magnetising force the sinusoidally distributed windings of the harmonics Zr and 5p and their multiples.

Figure 1 shows the BT structure; Fig. 2 illustrates the electrical circuit of the VT; on fig.Z - one of the sinusoidally distributed windings of the proposed W.

Multiple Nusny VT (Fig, 1) consists of coaxially arranged stationary stator housing 1, carrying magnetic conductor 2, and swiveling housing 3, carrying magnetic conductor 4. The windings 5 are located on the magnetic conductors 2 and 4 of the stator and rotor.

One of the rotor magnetic cores has a number of teeth, a multiple, the number of pole pairs (p) VT, and carries one excitation winding 6 (FIG. 2), made of a pole-type tooth. In this example, p is four and the number of teeth of the rotor magnetic circuit mi

The second magnetic circuit 4 (of the stator) must have a number of teeth multiple to fifteen. On this magnetic core there are two quadrature (shifted from each other in position of the axes by 90 degrees electr.) Windings 7 and 8, which are output sinus and cosine coils.

Since, in the proposed device, the excitation circuit is made of a tooth-pole type, the magnetizing force of this circuit has the highest amplitudes, the highest harmonics, whose numbers are equal to Зр and 5р, therefore, after rounding off the calculated values of the turns of the output sinusoidal distributions

divided windings should be in the additional spectrum of harmonics to suppress the harmonics of Zr and 5p.

The selected number of teeth of the magnetic circuit 4, a multiple of fifteen, makes it possible to suppress these harmonics by rounding the calculated values of the numbers of turns to integer numbers so as to fulfill the Z / 3 ratios

ilWp (i-l) O ii f 1 (1)

 2

and ratios

) 0.

(2)

where 1 is variable summation;

Z is the number of teeth of a magnetic circuit carrying a sinusoidally distributed winding; 1 - numbers that take in each equality one value from the row 1,2, ..., 2/3; 1 numbers that take in each equality one value from the row of the numbers l, 2j, ..., Z / 5; (l;, + Z / 3 (i-l) and 1g +

+ Z / S (i-1) - numerical values of teeth numbers.

Example. When p is equal to 4, the number of teeth carrying the output windings is a multiple of fifteen. Moreover, W is equal to 10 (the maximum number of turns, covering the magnetic wave, wires). The calculation of the number of turns of one of the windings is presented in the table, columns -5.

Column 5 shows rounded. the values of the number of turns covering the teeth of J. Let us check the calculated law (column 5) for correspondences with expressions (1) and (2).

To express (1)

one

one,

1-1

1 H W, h - - (i-O W, + Wg + W Oh,

i: 1 -5

2 Zl W, +. | - (i-l) Wi + W, + -1, It) -. (i-l) Wj - W, + W ,, .0,

at 11

ir1

4.W - - (i-l) W., + Wg + W, - +1,

143621 15

L. + {(i-1) W, 0 +

 1-7 J

To express (2)

1-1

When calculating and rounding the ratio of NINs (1) and (2) are not fully completed, it is necessary to introduce an adjustment to make them. Corrected values that give the fulfillment of relations (1) and (2) are given in column 6 of the table.

After this adjustment, the coil will not have an interaction between the primary and secondary windings along the 3p and 5p harmonics due to their accurate suppression on the secondary windings. The pattern of application of the winding obtained is shown in FIG. 3, the order of each of them is enumerated with grooves so that the first tooth is located between the 1O-M grooves, the second tooth between the 10th and 11th grooves, etc. Against the frontal parts of each tooth, the number of turns enveloping this tooth is written, in accordance with column 6 of the table.

The fulfillment of equalities (1) and (2) for the number of teeth of magnetic circuits that are multiples of fifteen provides for suppression in NS. windings of harmonics 3 and 5 and their multiples, i.e. and harmonics Sp and 5p.

The device works as follows.

When voltage is applied to the excitation winding 6 on the output windings 7 and 8, depending on the angular position of the rotor, respectively, proportional stresses sin r o and cos r o are applied, respectively.

The use of the proposed BT allows to significantly improve the accuracy of reproduction of sine-cosine dependences due to the complete elimination of distorting connections of the primary and secondary

15

{(i-1) W, 0 +

J

w

IS

0

C

five

0

g 5

secondary windings on harmonics Зр and 5р and multiple harmonics,

Claims (1)

 Invention Formula A multi-pole rotating transformer containing a stator and a rotor, one of which has a magnetic circuit with a number of teeth, a multiple of the number of pole pairs, and a winding pole-pole, and the second has a magnetic circuit with a number of teeth - non-multiple of the number of pole pairs, and two sinusoidally distributed windings, characterized in that, in order to increase accuracy, the number of teeth of the magnetic circuit carrying sinusoidally distributed windings is a multiple of fifteen, and the number of turns in the sections of sinusoidally distributed windings W - covering the teeth of a magnesium - ground wire, where j is the tooth number, satisfy the Z / 3 ratio We, + I (i-i) o {-1 j Z and g ratio 40 SlWo + I (i-1) /. f 11 2 -J 0, where 1 is the variable summation; Z is the number of the teeth of the magnetic circuit carrying sinusoidally distributed windings; - - one   about -3 Z 3  1.2 1 - 1 5 1 5. 1 s + I Ci-1); I (i-1) numerical values of the teeth numbers j. Phage.1 C0S / 70C Chish8tko9v In-59 t -Y-2 Yu - / JO 2 Yu -5 -in S innnn 3 Ю 11 12 nmnnrnmrnri  J W / 5/5 77 / / 5 Y7 2 PPG 22 2J tl. rm Xr g FIG. 2 PPG 22 2J .