SU773848A1

SU773848A1 - Linear displacement sine-cosine sensor

Info

Publication number: SU773848A1
Application number: SU792717537A
Authority: SU
Inventors: Михаил Васильевич Вершинин
Original assignee: Предприятие П/Я Г-4514
Priority date: 1979-01-22
Filing date: 1979-01-22
Publication date: 1980-10-23

Description

tt

Изобретение относитс к бесконтактным синусно-косинусным датчикам индукционного типа, линейного перемещени .The invention relates to non-contact sine-cosine sensors of induction type, linear displacement.

Известные синусно-косинусные датчики линейного перемещени индукционного и индуктивного типа имеют элементы в виде зубчатых реек, или винтрв 1 .Known sine-cosine sensors of linear movement of induction and inductive type have elements in the form of gear racks, or screw 1.

Их недостатком вл етс невысока точность из-за внутришаговой,погрешности , котора пр мо переходит в погрешность измерени ..Their disadvantage is the low accuracy due to intra-step error, which directly translates into measurement error.

Наиболее близким к изобретению по технической сущности и достигаемому результату вл етс синусно-косинусный датчик линейного перемещени , содержащий кольцевой статор с обмотками и безобмоточный ротор, выполненный из чередующихс магнитных и немагнитных колец 2.Closest to the invention in technical essence and the achieved result is a sine-cosine linear displacement sensor comprising an annular stator with windings and a non-winding rotor made of alternating magnetic and non-magnetic rings 2.

Недостаток его - невысока точность измерени .Its disadvantage is the low measurement accuracy.

Цель изобретени - повышение точности измерени .The purpose of the invention is to improve the measurement accuracy.

Эта цель достигаетс тем, что статор выполнен с гладкими полюсами, на которых установлена обмотка возбуждени и с чередующимис с ними зубчаты .ми полюсами, на которых установленыThis goal is achieved by the fact that the stator is made with smooth poles, on which an excitation winding is installed, and with alternating teeth with them, on which poles are mounted.

синусна и косинусна обмотки, зубцы соседних полюсов смещены между собой по длине статора на длину зубца, а число пар магнитных иthe sine and cosine windings, the teeth of the adjacent poles are displaced among themselves along the length of the stator by the length of the tooth, and the number of pairs of magnetic and

5 немагнитных колец ротора не имеют общего делител , кроме единицы с числом зубчатых полюсов.5 non-magnetic rotor rings do not have a common divider, except for one with the number of gear poles.

На фиг. 1 дана принципиальна конструктивна схема датчика; а фиг.210 конструктивна схема развертки пакета статора; на фиг. 3 - лист пакета статора.FIG. 1 is given the principal structural diagram of the sensor; and Fig.210 is a structural diagram of the sweep of the stator package; in fig. 3 - stator package sheet.

Синусно-косинусный датчик линейного перемещени содержит шихтованныйThe sine-cosine linear displacement sensor contains a laminated

15 статор 1 кольцевого типа с обмотками и безобмоточный цилиндрическз1й ротор 2. Статор состоит из гладких полюсов схватываемых секци ми W обмотки возбуждени , соединенных между15 is a ring-type stator 1 with windings and a cylindrical winding-free rotor 2. The stator consists of smooth poles set by sections W of the excitation winding connected between

20 собой последовательно- согласно, и зубчатых полюсов, охватываемых сек-, ци ми NW, -синусной и VMj-косинусной Обмоток.20 are consistently in accordance with, and the gear poles covered by sections, ci, NW, -sinus and VMj-cosine windings.

На фиг. 2 цифрами по горизонталиFIG. 2 digits horizontally

25 3-4 пронумерованы полюсы, а по вертикали 15-26 - пластины (пакеты пластин) в пакете статора.25 3-4 poles are numbered, and vertically 15-26 - plates (plate packs) in the stator package.

Гладкие полюса 3, б, 9 и 12 черегдуютс с двум зубчатыми полюсами 4 иThe smooth poles 3, b, 9, and 12 alternate with two notched poles 4 and

Claims

30 5; 7и8; 10 11 13 14. On the first four 4, 5, 7 and 8 one part of the windings is distributed, and on the next four 10, 11, 13, 14 - another part of the sections of the windings. Such a scheme makes it possible to obtain two repetitive parts around the stator circumference. The number of teeth in the gear pole along the length of the stator packet determines the number of repetitions along the package length. The teeth of the toothed poles alternate in length with the valleys. The teeth of one toothed poles relative to the teeth of the other toothed poles are dependent on the pole number, offset along the length of the package, in increments equal to the length of the tooth. Such a stator package design is achieved by assembling it from plate notches. The stator package is assembled as follows. The plate (plate pack) 15 has the position indicated in FIG. 3, Plate 16 assumes the position of plate 15, rotated clockwise to .90 so that tooth 27 assumes the position of tooth 28. Plate 17 assumes the position of plate 16 inverted by 180 ° so that teeth 29 and 30 remain in place. The plate 18 takes the position of the plate 17 rotated 90 ° clockwise so that the tooth 28 takes the position of the tooth 29. Such a package element structure represents one repeating part of the sensor along the length of the stator package. The numbers of turns in the sections, XW -sinus and Wj - the cosine windings, covered by the jagged poles, have respectively the sine and cosine dependencies on the pole number. The rotor of the sensor is made of alternating magnetic and non-magnetic rings. The number of pairs of magnetic and non-magnetic rings that do not have common rings and the number of jagged poles are mutually simple numbers. The sensor works as follows. When the rotor moves along the axis, the flux linkage of the working windings changes in a sine wave, for a sine winding and in a cosine, for a cosine winding, the laws of the magnitude of the rotor movement, therefore, the characteristics of the envelopes of the amplitude of the output voltages of the sine and cosine windings have a correspondingly sinus and cosine dependence displacement values with a period equal to the period of the rotor. An inventive sine-cosine linear displacement sensor comprising an annular stator with windings and a non-winding rotor made of alternating magnetic and non-magnetic rings, characterized in that, in order to improve the measurement accuracy, smooth poles are mounted on the stator, on which an excitation winding is installed and alternating with them are the gear poles, on which the sine and cosine windings are installed, the teeth of the adjacent poles being displaced among themselves along the length of the stator by the length of the tooth, and the number of pairs of magnetic and nonmag itnyh.kolets rotor have no common divisor other than unity, the number of toothed poles. Sources of information taken into account during the examination 1. USSR author's certificate No. 375669, cl. C 08 S 19/12 1971.

2. USSR author's certificate according to application code 2409835, cl. H 02 K 24/00, 1976.

3

J It 5 6 7

3 10 f1 12 /