SU1312696A1 - Two-reading synchro resolver - Google Patents

Abstract

The invention relates to electric machines of automatic systems and computer technology and can be used to create high-precision two-digit rotary transformers and phase shifters. The aim of the invention is to simplify the design and improve accuracy. A two-digit rotating transformer consists of coaxially arranged stationary stator housing carrying the magnetic circuit and a rotary housing of the rotor with the magnetic core. innnnln 1g-1gpgp1 mlnr On the magnetic cores of the stator and the rotor are located the excitation windings and output. On the rotor there are two pairs of quadrant windings. One pair of windings, made two-pole, belongs to the coarse reference channel, and the other couple, made multi-pole, belongs to the exact reference channel. Each output coil of the coarse reference channel is made by using part of the sections of a single coil of the exact reference. The first conclusions of the CIP, the accurate sine winding and the coarse reference are common. The second output C2-) of the coarse-reading winding is an intermediate tap of the entire winding, and the second output of the C 2m winding of the exact reading is the end of the entire sinus output winding. A cosine winding is similarly constructed. This arrangement of windings allows to increase the number of turns, improve accuracy and simplify the design. I zp f-ly, 3 ill. 1 tab. § (L Fig.Z

Description

one

The invention relates to electric machines of automatic systems and computers and can be used to create high-precision dual-count rotary transformers (DVT) and phase shifters.

The purpose of the invention is to simplify the design and increase accuracy by increasing the maximum number of conductors in the groove of the output winding of the accurate reading channel and the resulting decrease in errors caused by rounding the calculated numbers of conductors in the slots of the magnetic conductor.

Figure 1 shows DVT; Fig. 2 illustrates the principle circuit of the DVT; on fig.Z - scan one of the output windings of the DVT.

DVT consists of coaxially arranged stationary stator housing 1 (Fig. 1) carrying the magnetic core 2, and a rotary housing of the rotor 3 carrying the magnetic core 4. On the magnetic conductors 2 and 4 of the stator and the rotor windings 5 are placed in the grooves. both on the rotor and on the stator. In the proposed DVT, the field windings are placed on the rotor, and the weekend are on the stator.

On the rotor (Fig. 2) there are two pairs of quadrature (shifted among themselves by 90 el. Degrees) excitation windings: a pair of bipolar windings, which are coarse reference windings, and a pair of multipoles with a number of pole pairs T, which are windings of an exact reference. These windings can be of any type and are usually made with a sinusoidal distribution of conductors in the grooves of the magnetic circuit.

The first coil excitation winding has pins B and B, and the second, Bji pins, and the First excitation channel excitation winding has pins B and Bjfp, and the second, Pvtp and 4 pins. TFTs can be performed without second (quadrature) excitation circuits. The output windings of the DVT are drum.

Each coil rough output winding is accomplished by using part of one precision winding sections that have the same polarity on the magnetic core bore in the same angular zone occupied by I26962

semi-circle, and the opposite one is the polarity in the remaining corner zone. The coarse winding sections are included at the beginning.

5 of each upstream winding so that its beginning is the beginning of the output windings of both coarse and accurate readings, the intermediate lead is the second lead of the coarse read winding and the sum of all sections of the output winding is the second lead of the exact read winding.

The first conclusions of the sinus winding of the exact С, „and coarse C readings

 5 are common, the second coil of the coarse reference coil by the intermediate branch of the entire winding, and the second coil of the exact coil C;. „- the end of the entire sinus output coil

20 ki.

The cosine winding is similarly constructed and has conclusions, respectively, of the beginning of both windings K and K and the ends of the cosine windings of coarse

25 count K-, and accurate count Kj.

Since the primary excitation windings of a rough reference have a sinusoidal distribution along the bore of the Magnetic Circuit, the shape of the 30-l winding has the form of a sinusoid. Each section of the coarse output winding, when rotating the rotor shaft per revolution, in its output voltage reproduces the shape of the excitation field (i.e., a sinusoid), and since adding a sinusoid also produces a sinusoid, then the winding consists of several sections, also gives a sinusoidal change in output

40 voltages when changing the rotation of the rotor. The distortion of this sinusoid occurs only due to the general higher spatial harmonics in the decomposition of the excitation field and the field

45 formed output winding. Such accuracy distortions for coarse windings are not significant.

Coarse count output

0 can have an arbitrary orientation relative to the magnetic circuit, which can lead to non-perpendicularity of the output windings of a rough reference. In order to obtain windings perpendicular to pnii when selecting sections for coarse-reading windings, it is necessary to obey the condition in each

P

21 W cosci Oh,

i 1

(I)

313

where n is the number of teeth of the magnetic circuit covered by the coil sections of the coarse reference channel; i - numbers of teeth covered

coarse-count channel winding sections;

W. is the number of turns taken with a sign that teaches the direction of the winding of the section, the winding of the coarse canal channel covering the i-th tooth; d is the angle between the origin of the angles along the magnetic core bore and the axis of the i-ro slot. In order to ensure that one of the zero positions of the precise counting winding coincides with one of the zero positions of the rough counting winding, the angular position, 45 ° from the position, should be considered as the starting point of the angles, cooTseTCTBvmnipm D5 el.

i J J W cosofj

354 19720 -0.955 -51.7

445 3l 09 0.856-t-41.8

From the table it follows that

S. W cosoi- O.

Practically, when creating a coarse reference winding, to obtain the maximum signal, it is advisable to select the maximum number of sections from the coil of the exact reference, which satisfy the requirements of this coarse reference winding construction, and then ensure that (1) discarding some sections or reducing the number of turns in separate sections, ensuring required perpendicular accuracy of windings.

Dates works as follows.

When the excitation voltage is applied to the coil of the coarse and accurate readings on the full output windings, a voltage is generated which varies from the angle of rotation of the rotor in proportion to sin mot and cos mo. At the same time, coarse reference voltages are applied to the output windings, proportional to sin Ы and coso.

64

when calculating the distribution of the windings of the exact reference

In this case, the conditions for obtaining the perpendicularity of the coarse-reading output windings are already taken into account and the origin of the angle o is given (, - which is required to obtain a coincidence of one of the zero positions

precision winding with one of the zero positions of the coarse winding.

For example, it is specified because four teeth are selected, given

the numbering and number of turns covering these teeth, as well as the position of the groove (1), corresponding to the angular position1 of 45 eh. each, when calculating the precise counting windings.

The test results are shown in the table.

The space in the grooves of the magnetic cores occupied by the coil rough output windings is completely freed, since the coarse windings are made using sections of the exact winding output winding, which makes it possible to increase the number of turns of the output winding of the exact count and improve accuracy due to better rounding of the number of turns in the calculation of windings , to improve the quality of the windings by increasing the useful area of the groove and reduce the complexity of their implementation.

Claims (2)

1. A double-counting rotary transformer containing a cylindrical stator and a rotor, in the magnetic grooves of which, placed around the circumference, are installed pairs of quadrature bipolar and multipolar windings of coarse and precise readings, and the output windings placed on one of the magnetic cores are made 513 drum in the form of serially connected sections, characterized in that, in order to simplify the construction and increase accuracy, one end of the coarse output winding is aligned with one of the ends of the exact coil output winding, to which the exact coil winding sections are connected, having the same winding direction, placed on one half of the circumference of the grooves and connected to the sections of the winding of the exact reference, having the opposite direction of winding and placed on the other half of the circumference tim grooves outer section of which is connected to the adjacent winding channel section situated accurate reading and the other end of the winding channel coarse frame connected with the other series-connected winding sections accurate reading. 2696i 2. A transformer according to claim 1, characterized in that, in order to increase accuracy by increasing the mutual perpendicularity of the 2 coarse counting channel windings, the number of turns of the sections of each coarse output channel winding is equal to P ABOUT five 0 21 W-cos ot i i i where n is the number of teeth covered coarse-count channel winding sections; i - numbers of teeth covered coarse-count channel winding sections; W. is the number of turns of the coil section of the coarse reference channel, taken with a sign that teaches the direction of its winding;  - the angle between the origin of angles along the bore of the magnet tube and the axis of the i-ro slot. 8.1 th "/ b 8j; tl AT 21 V2 B2 1 Si ± 1t f SinoL 2 / 5iomo6 "eleven Kg / 1t Cosof Kjfn Cos motf 2fn 2 Compiled by V. Komarov Editor I. Shulla Tehred l, Serdyukova Proofreader A.T. Order 1978/54 Circulation 661 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4