SU1467686A1 - Multiple-pole rotary transformer - Google Patents

Abstract

The invention relates to electrical engineering and can be used to create high-precision rotators with transformers (BT). The aim of the invention is to increase accuracy by reducing capacitive coupling between the output windings. W contains a rotor and a stator, the magnetic core of one of which, carrying the output windings, has a number of grooves equal to 4p (where p is the number of pairs of poles). Each output winding is ring-shaped and placed in one half of the grooves uniformly distributed along the magnetic conductor. 4 il.

Description

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The invention relates to electrical engineering and can be used to create high-precision rotating transformers (BT).

The purpose of the invention is to increase accuracy by reducing capacitive coupling between the output windings.

Figure 1 shows the constructive arrangement of the cores W; figure 2 - plate of the magnetic stator and rotor; FIG. 3 shows the electrical circuit of the VT; figure 4 a, b - output windings W.

The multipolar VT consists of coaxially arranged fixed case of stator 1 (FIG. 1), carrying magnetic circuit 2, and rotary housing 3 of the rotor carrying magnetic circuit 4. The magnetic windings 2 and 4 of the stator and the rotor accommodate the windings 5. One of the magnetic conductors In the considered example of the rotor, it carries the excitation windings, the second - the stator, carries the output windings. The rotor magnetic core can generally have any number of teeth and carry any type of winding. In this example, the rotor magnetic core has twenty-one teeth. The VT stator magnetic core has a number of teeth on the side of the working gap, equal to 4 p, where p is the number of pole pairs, and makes it possible to perform ring-type windings (applied through the RMO), i.e. has grooves also from the side opposite to the working gap. In this example, the number of pairs of poles p is four, therefore the number of teeth of the stator magnetic circuit is sixteen. Fig. 2 shows sheets 6 and 7 of the magnetic cores of the rotor and stator, respectively, from which the magic bags are assembled and glued together.

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nitrovodovrov. On the side opposite to the working gap, on the stator magnet wire there are four large grooves that ensure the application of ring type windings.

Two quadrature windings 8 and 9 of excitation (fig. 3) and two quadrature output (sine and cosine) windings 10 and P. Vyshody of the excitation windings are marked on the rotor magnetic core of the stator and the excitation windings of the output windings -. (sine) and (cosine).

The field windings can be of any kind, ring or drum type. In this example, since only the slots on the side of the working gap are provided on the magnetopro-20 of the rotor's water, the excitation windings should be made bar-bath. Depending on the choice of the number of teeth of the rotor magnetic circuit, the coils can be centered ( , a multiple of 2p) and sinusoidally distributed (when the number of teeth is not a multiple of 2p). B. In this case, the windings must be JQ sinusoidally distributed.

The output windings are made circular and are distributed on the magnetic core so that the sinus winding occupies all the odd grooves, the number of which is equal to half of the total Number of the magnetic slots of the magnetic circuit, and the cosine winding occupies all the even grooves; stator magnetic circuit. Since the number of grooves of the magnetic circuit is chosen equal to Q 4p, both windings have a uniform distribution with polarity reversal opposite to adjacent sections of one winding. FIG. 4a shows a sinus winding, and FIG. 4b is a cosine winding.

The device works as follows.

When AC voltage is applied to the winding 8, depending on the angular position of the rotor, a sinus output winding 10 induces a voltage proportional to the sin. A cosine output winding 11 is induced by the cos -pcc.

When powered by the winding 9

on the output windings 10 and P will be ,. accordingly induced voltage

-f 90 °) and

proportional sin (ro (. ow (dew + 90).

The proposed performance of the VT reduces the capacity of the winding windings due to their separation, since neither in the slots nor in the frontal parts do the output windings touch each other, which leads to higher accuracy when using the VT in angle-to-code converters

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the invention

A multi-pole rotary transformer containing a rotor and stator magnetic cores, on one of which in uniformly distributed slots, the number of which is 4p, has output windings, where p is the number of pole pairs, and the other windings have an excitation winding, characterized in that The goal is to ensure accuracy by reducing the capacitive coupling between the output windings, each output winding is ring-shaped and placed in one half of the slots alternating with the slots occupied by the other output winding.

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Compiled by V. Komarov

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Claims (1)

Claim A multi-pole rotating transformer containing magnetic circuits of the rotor and stator, on one of which in evenly distributed grooves, the number of which is 4p, output windings are installed, where p is the number of pole pairs, and on the other magnetic circuit excitation windings are installed, characterized in that, for the purpose of improving accuracy by reducing the capacitive coupling between the output windings, each output winding is made circular and placed in one half of the grooves, alternating with the grooves occupied by the other output winding. Figure 1 Fie. H Figz Compiled by V. Komarov Editor E. Papp Tehred A. Kravchuk Corrector I. Muska Order 1207/51 Circulation 645 Subscription VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent, Uzhhorod, st. Gagarina, 101