SU1646024A1 - Double-scale rotary transformer - Google Patents

Abstract

Invent from carrying to electrotechnical engineering, in particular to the electrical mains of automatic systems and computing technology, and can be used to create high-precision two-count rotating go-to-mappers (DVT) and phase shifters. The purpose of the design is to improve the accuracy of the rough reading of the lvn. Each quadrant output winding of coarse and accurate readings consists of two one and the same parts with a distribution of the number of conductors in the grooves of a man-made cable for parts of the sine and cosine windings, defined in accordance with the above simulations. DVT is equipped with a switching device for switching parts of the windings and the formation of rough and accurate readings. 2 Il.

Description

The invention relates to electrical engineering, in particular to electrical machines of automatic systems and computing, and can be used to create high-precision two-digit rotary transformers (DBT) and phase shifters.

The aim of the invention is to improve the accuracy of the coarse FTRT ,.

1e FIG. 1 illustrates the principle of construction of a DVT design; in fig. 2 - electrical circuit of LVG

The DVT consists of a stationary case of one hundred mounts (fig. 1), a supporting conduit 2 and a rotary case of a rotor 3, carrying a magnetic conductor 4. The magnetic coils 2 and b crcnopi and the rotor are connected to the windings 5.

The marks of the prompting MOI yp are located on the stator, both on the rotor and on the stator. In the described embodiment of the DVT, the field winding is placed on the rotor, and the output windings are placed on the stator

The design of the excitation windings in the device in question can be any. There may be two quadrature windings of coarse and accurate readings, maybe one coil of winding and exact readings, and there may be one general excitation winding and coarse and exact readings (this is the case of consecutive switching of coarse and exact readings of windings). The type of implementation of the excitation windings (ring or drum) and the type of coil (sinusoidally distributed or concentrated, or their combination) can also be any.

In the example being described, we assume that the excitation circuit for both

About Јъ

ABOUT

ABOUT

1C

counts made in the form of a common winding 6 (Fig. 2), placed on the magnetic core of the rotor.

I

Unlike the prototype, each

The sine and cosine output windings of the coarse and precise readings consist of the series connection of two of the same winding parts 024 4

ki „Each part of the winding consists of sequential connection of annular sections, the number of conductors of which in the working grooves (grooves located on the side of the working gap between the rotor and stator magnetic cores) of the magnetic conductor is defined for the parts of the sinus windings (M / L and N.) expressions

Black

Yu

Ґ {. -,).

H

Nrn 2

and for parts of the cosine windings / N {K and expressions

20 1

. - L

K 2

C0 ... | i-O | j I - f with “P“ -,) - with. . “- ,,.

where 1 is the number of working slots of the magnetic pipeline;

Z is the number of working slots of the magnetic conductor;

N is the maximum number of conductors of one winding in the groove of the magnetic circuit;

p is the number of pairs of poles of the exact reference.

The first part 7 (Fig. 2) and the second part 8 of the sinus windings are of rough and precise reference, the conclusions of which are labeled respectively C.C. g and

and

„/ I

C C

1g.

and also the first part 9 and sec

Part 10 of the cosine windings of a coarse and precise reference, the outputs of which are labeled respectively K F1 and

h

 i lg

switching device 11 to two positions. With one position of the contacts of the switching device 11

N | C f- +, Ј (i -,) h {| Ј (

.р | (1- „-.in bЈ i-nft.Vi. | Ј.pЈi

For exact cosine winding

designated TO (exact count) of each output winding are connected to each other in series according to, forming a sinus and cosine output windings of a precise count, connected to the corresponding outputs. In the other position of the contacts of the switching device, designated GO (coarse count), parts of each output winding are interconnected in series with each other, forming a sine and cosine output

winding-coarse count, connected to the corresponding outputs.

We show that the described construction of coarse and accurate readings of windings provides a sinusoidal distribution of them with a periodicity of P for the windings of an exact reading and with a periodicity of 1 for the windings of a rough reference. For the accurate sine winding, we get

-about

reference we get

N; K + N; k 7

f n 2C + pr- (i

+ cos

- 1) (i- 1)

| + P | i (i.0.cosf |. | Ia- ,,} ..

For a sinus winding coarse from ..-. ,,) +. 1. (| + | (. ГЈ. „2,., L. К. 2U .. .Л.. Г1Г. 2ft

- “- Ј - .г“ - v4J Ј “-}

For the cosine winding coarse

 ii N - N K wiK

Gi - cos + p

.. | d -,) ". Ј “-, .Ј (i - ,,. V .. (

Therefore, a sinusoidal distribution of the output windings is provided for both coarse and accurate counting using only the ring sections necessary to create a precise count winding.

DVT works as follows.

When an excitation voltage is applied to the winding 6, when the contacts of the switching device 11 are placed at the outputs, depending on the angular position 66 of the rotor, voltages proportional to sinpoЈ and cospfti will be induced, and if the contacts of the switching device GO are applied to the outputs, depending on the angular The rotor positions will be induced by voltage proportional to cosui, respectively.

The DVT has a much higher roughness accuracy regardless of the design of the excitation circuit, it has a small error from the influence of the excitation circuit of the exact reference on the rough counting, which reached "if fiJ + P | (i - ,,. .§- (-.) }

i- ЬЬ Ј «- -« - Л (

and for cosine winding parts

-, J

bills get

reference we get

-, (

.

25 nto securing sinusoidal

coarse-count output windings, and can provide work30

DVT ability at any reduction

accurate readout.

Claims (1)

Invention Formula A two-counting rotating transformer containing a stator and a rotor, in the grooves of the magnetic cores of which the coils of coarse and precise counts are located, having quadrature output coils of an exact reading of the ring type with sinusoidal distribution of conductors along the grooves of the magnetic conductor, and the coils of the coarse reference winding are made of accurate windings of reference, in order to improve the accuracy of the coarse readout, each quadrature output coil of the coarse and accurate readings consists of two e parts having the distribution of the numbers of conductors in the slots of the magnetic circuit for sinus winding parts  "TO 2fr + P f (i NU Up 2 ((. where i - the number of working slots of the magnetic circuit; Z is the number of working slots ground lead; N is the maximum number of conductors of one winding in the groove of the magnetic circuit; P - number, pairs of exact poles countdown the transformer is equipped with a switching device to which it is connected  /// S / SSSTZfTl HHHCHCHCHUUUU figure 1 -n K 2 ,. + + Y (1 one I part of the output windings, with one The contact position of which parts of each output winding is included is itself consistently consistent to form the output windings of a precise reference, and for a different contact position, parts of each output winding are connected between each other in series to form the output windings of a rough reference.