SU1411889A1 - Two-channel induction reductosyn - Google Patents

Description

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The invention relates to measuring electrical machines and can be used in the field of automation and computing technology as an angle-code encoder.

The aim of the invention is to improve the accuracy of converting the angular position.

FIG. 1 shows an example of a two-phase induction reductosin; in fig. 2 - one part of the rotor; in fig. 3 - the other part of the rotor. Dual channel induction gearbox contains a stator 1 and a gearless winding rotor. The rotor is composed of two parts 2 and 3. Part 2 has Zp 32 teeth, evenly spaced around the circumference, and part 3 has Z p 23 teeth, which are located around the circumference. The number of teeth of parts 2 and 3 of the rotor do not have common factors. The stator 1 has, for example, 44 slots. In the slots of the stator are located the excitation winding 4, the output winding 5 of the exact channel and the output winding 6 of the coarse channel. The excitation winding 4 is made of a tooth-pole type and has a number of pole pairs Rd 22. The output winding 5 of the exact channel is made two-phase, sinusoidally distributed, It has a number of pole pairs equal to RL, S, i.e. the sum of Pg + Р j is equal to the number of teeth of part 2 of the rotor, which forms the exact channel of induction reductosin. The additional output winding 6 is also made two-phase sinusoidally distributed. It has a number of pole pairs equal to the sum or difference of the number of teeth of the second part 3 of the rotor and the number of pole pairs of the excitation winding. In this case, the number of pairs of poles of the additional output winding is equal to the difference between the specified parameters, i.e. i 1. The distribution of the windings is performed by known methods. The specific distribution of the windings of a given polarity is determined by the parameters of the power supply, the required output voltage of the induction reductosin, and can be determined in the development of working documentation.

When the excitation winding 4 is powered by an alternating current, a pulsating magnetic field is created in the air gap. Its distribution over the stator bore depends on the number of pole pairs of the excitation winding and the number of rotos teeth.

Assume that reductosin has only the left part 2 of a rotor with 32 teeth. Since the number of pole pairs of the output winding 5 is equal to the difference PI 6, an emf is induced, which varies from the angle of rotation of the rotor with a frequency equal to the number of teeth of the rotor, i.e. 32. The number of pairs of poles of the additional output winding 6 is not equal to the difference Z p - R., therefore, in this case there is no EMF in it. If we assume that reductosin has only the right part 3 of a rotor with 23 teeth, then the EMF is induced only in winding 6, and the EMF of winding 5 is zero, i.e. The right part 3 of the 23-prong rotor does not affect the EMF of the output winding 5 of the exact channel, which depends only on the angular position of the part 2 of the 32-prong rotor. This means that when the excitation winding of the reductosin is energized by an alternating current, an emf is induced in the output winding 5, which varies with the angle of rotation of the rotor at intervals of ZP 32, and c. winding winding 6 - EMF, varying with the angle of rotation

0

five

0

rotor, with a frequency of Z

Rg

23.

Induction reductosin provides a two-fold conversion of the angular position into electrical signals, and the mutual change in the output signals of the exact and coarse channels when the rotor rotates 360 and 360 has no repeating parts. This makes it possible to unambiguously determine the angular position within one revolution of the rotor from the output signals of the exact and coarse counts of reductosin. Both the exact and coarse channels of induction reductos are multi-pole, the rotor is symmetrical, which reduces the dependence of the output signal of reductosin on the change in the air gap and increases its conversion accuracy.

FIG. 2

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Claims (1)

TWO-CHANNEL INDUCTION REDUCTOSIN, comprising a rotor in the form of a gearless winding magnetic circuit and a stator with an excitation winding and readout outputs located on it, characterized in that, in order to increase the conversion accuracy, the rotor is equipped with an additional gear magnetic circuit mounted axially relative to the main magnetic circuit, the number of teeth of the additional magnetic circuit the rotor does not have common factors with the number of teeth of the main magnetic circuit, and the number of pairs of poles of the output winding of the coarse channel count equals the sum or difference of the number of additional magnetic rotor teeth and the number of pole pairs of the excitation coil windings fine and coarse Denia channels. Fig. /