RU94027472A - Ac machine rotor speed transducer - Google Patents

Ac machine rotor speed transducer

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Publication number
RU94027472A
RU94027472A RU94027472/28A RU94027472A RU94027472A RU 94027472 A RU94027472 A RU 94027472A RU 94027472/28 A RU94027472/28 A RU 94027472/28A RU 94027472 A RU94027472 A RU 94027472A RU 94027472 A RU94027472 A RU 94027472A
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RU
Russia
Prior art keywords
outputs
inputs
comparators
output
filters
Prior art date
Application number
RU94027472/28A
Other languages
Russian (ru)
Other versions
RU2085953C1 (en
Inventor
А.Ю. Афанасьев
А.В. Андрианов
И.Т. Тарасова
Original Assignee
Казанский государственный технический университет им.А.Н.Туполева
Казанский научно-исследовательский институт радиоэлектроники
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Application filed by Казанский государственный технический университет им.А.Н.Туполева, Казанский научно-исследовательский институт радиоэлектроники filed Critical Казанский государственный технический университет им.А.Н.Туполева
Priority to RU94027472A priority Critical patent/RU2085953C1/en
Publication of RU94027472A publication Critical patent/RU94027472A/en
Application granted granted Critical
Publication of RU2085953C1 publication Critical patent/RU2085953C1/en

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  • Control Of Electric Motors In General (AREA)
  • Control Of Eletrric Generators (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

FIELD: precision electromechanical systems with synchroes or resolvers. SUBSTANCE: sine and cosine outputs a and b, respectively, of electrical machine 1 are connected through phase-sensitive rectifiers 2, 3 to differentiating filters 4, 5 and to multipliers 8, 9 whose digital inputs are connected to output of reversing counter 21 and their outputs, to inertia filters 6, 7. Outputs of phase-sensitive rectifiers 2, 3 are connected to inputs of comparators 11, 12 and outputs of filters 4-7, to inputs of comparators 10, 13. Comparator outputs are connected to inputs of 3AND gates 14-17 whose outputs are connected through OR gate 19 to control input of reversing counter 21. Carry output of the latter and output of pulse generator 20 are connected to inputs of 2AND gate 18 whose output is connected to complementing input of reversing counter 21. Comparators 11, 12 determine modulo higher signal out of ü, uarriving from outputs of phase-sensitive rectifiers 2, 3 and true value of speed ω is compared across comparators 10, 13 with its estimated value. Logical circuits 14-17, 19 determine forward or reverse count mode of reversing counter 21 and circuit 18 prevents clearing of reversing counter 21 at zero or maximum value of %%%. True value of speedof electrical machine 1 is directly tracked. EFFECT: improved accuracy and extended speed range. 1 dwg

Claims (1)

Устройство предназначено для прецизионных электромеханических систем с сельсинами или с вращающимися трансформаторами. Задача изобретения - повышение точности и расширение диапазона частот вращения. Синусный а и косинусный в выходы электрической машины 1 через фазочувствительные выпрямители (ФЧВ) 2, 3 подключены к дифференцирующим фильтрам 4, 5 и к перемножителям 8, 9, цифровые входы которых подключены к выходу реверсивного счетчика (PC) 21, а их выходы - к инерционным фильтрам 6, 7. Выходы ФЧВ 2, 3 подключены к входам компараторов 11, 12, а выходы фильтров 4 - 7 - к входам компараторов 10, 13. Выходы компараторов подключены к входам элементов 3И 14 - 17, выходы которых через элемент ИЛИ 19 соединены с управляющим входом PC 21. Его выход переноса и выход генератора импульсов 20 подключены к входам элемента 2И 18, выход которого подключен к счетному входу PC 21. Компараторы 11, 12 определяют больший по модулю из сигналов Uа, Uв, поступающих с выходов ФЧВ 2, Э, а на компараторах 10, 13 сравнивается истинное значение частоты вращения ω с ее оценкой
Figure 00000001
Логические схемы 14 - 17, 19 определяют режим прямого или обратного счета PC 21, а схема 18 предупреждает сброс PC 21 при нулевом или максимальном значении
Figure 00000002
Поставленная задача решается путем прямого слежения за истинной частотой вращения электрической машины 1.The device is intended for precision electromechanical systems with selsyn or with rotating transformers. The objective of the invention is improving accuracy and expanding the range of rotational speeds. The sine and cosine outputs of the electrical machine 1 through phase-sensitive rectifiers (PCF) 2, 3 are connected to differentiating filters 4, 5 and multipliers 8, 9, the digital inputs of which are connected to the output of the reversing counter (PC) 21, and their outputs are connected to inertial filters 6, 7. The outputs of the PCF 2, 3 are connected to the inputs of the comparators 11, 12, and the outputs of the filters 4 - 7 are connected to the inputs of the comparators 10, 13. The outputs of the comparators are connected to the inputs of elements 3I 14 - 17, the outputs of which are through the OR element 19 connected to the control input of PC 21. Its transfer output and generator output pulses 20 are connected to the inputs of element 2I 18, the output of which is connected to the counting input of PC 21. Comparators 11, 12 determine the largest in magnitude of the signals U a , U c coming from the outputs of the PCF 2, E, and on the comparators 10, 13 true value of rotation frequency ω with its estimate
Figure 00000001
Logic circuits 14-17, 19 determine the forward or reverse counting mode of PC 21, and circuit 18 prevents the reset of PC 21 at zero or maximum value
Figure 00000002
The problem is solved by directly monitoring the true speed of the electric machine 1.
RU94027472A 1994-07-19 1994-07-19 Frequency detector for rotor of alternating- current electric motor RU2085953C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94027472A RU2085953C1 (en) 1994-07-19 1994-07-19 Frequency detector for rotor of alternating- current electric motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94027472A RU2085953C1 (en) 1994-07-19 1994-07-19 Frequency detector for rotor of alternating- current electric motor

Publications (2)

Publication Number Publication Date
RU94027472A true RU94027472A (en) 1996-05-10
RU2085953C1 RU2085953C1 (en) 1997-07-27

Family

ID=20158776

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94027472A RU2085953C1 (en) 1994-07-19 1994-07-19 Frequency detector for rotor of alternating- current electric motor

Country Status (1)

Country Link
RU (1) RU2085953C1 (en)

Also Published As

Publication number Publication date
RU2085953C1 (en) 1997-07-27

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