RU94028937A - Device to control two-phase asynchronous motor under condition of oscillatory motion - Google Patents

Device to control two-phase asynchronous motor under condition of oscillatory motion

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Publication number
RU94028937A
RU94028937A RU94028937/07A RU94028937A RU94028937A RU 94028937 A RU94028937 A RU 94028937A RU 94028937/07 A RU94028937/07 A RU 94028937/07A RU 94028937 A RU94028937 A RU 94028937A RU 94028937 A RU94028937 A RU 94028937A
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RU
Russia
Prior art keywords
frequency
dividers
constant
oscillations
winding
Prior art date
Application number
RU94028937/07A
Other languages
Russian (ru)
Other versions
RU2082277C1 (en
Inventor
А.В. Бодячевский
Ю.Г. Крынин
С.А. Ткалич
Original Assignee
Воронежский государственный технический университет
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Publication date
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Priority to RU94028937A priority Critical patent/RU2082277C1/en
Publication of RU94028937A publication Critical patent/RU94028937A/en
Application granted granted Critical
Publication of RU2082277C1 publication Critical patent/RU2082277C1/en

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  • Control Of Ac Motors In General (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

FIELD: electrical engineering. SUBSTANCE: excitation winding of two-phase asynchronous motor is connected directly to supply network and its control winding is linked to it through frequency converter incorporating master generator, three frequency dividers with controlled (n1), constant (n2) and variable count-down ratios, pulse counter. Generator is connected to frequency dividers with controlled and constant count-down ratios, output frequencies of dividers will be f1 and f2. Pulse counter determined number of pulses of frequency f1 during time of half-period of voltage feeding excitation winding. Result of operation of counter is number N - number of pulses of frequency f1 in each half-period of voltage feeding excitation winding of motor. Number N is variable coefficient of setting (it changes with change of network frequency) for divider with variable count-down ratio at which output we shall have f3 = k•fc., where. Frequency of oscillations of shaft fk = fs-fn does not depend on changes of network frequency. Thus winding of stator of asynchronous motor is energized by alternating currents of different frequencies, one of which is obtained by multiplication of other frequency by constant ratio. Frequency of oscillations of shaft in this case is controlled by change of multiplication factor k and stability of oscillations is determined by word length of counter and reaches 0.01%. EFFECT: enhanced reliability of control.

Claims (1)

Устройство позволяет повысить стабильность колебаний вала двигателя. Это достигается тем,что обмотка возбуждения двухфазного асинхронного двигателя подсоединена к питающей сети непосредственно, а обмотка управления через преобразователь частоты, который состоит из задающего генератора, трех делителей частоты - с регулируемым (n1), с постоянным (n2) и переменным коэффициентами деления, счетчика импульсов. Генератор соединен с делителями частоты с регулируемым и постоянным коэффициентами деления, выходные частоты делителей будут соответственно f1 и f2. Счетчик импульсов определяет количество импульсов частоты f1 за время полупериода напряжения питающего обмотку возбуждения. Результат работы счетчика - число N - это число импульсов частоты f1 в каждом полупериоде напряжения питающего обмотку возбуждения двигателя. Число N является переменным коэффициентом задания (меняется при изменении частоты сети) для делителя с переменным коэффициентом задания, на выходе которого в результате деления получим fз = k•fc, где k = n1/n2. Частота колебаний вала fк = fз-fc не зависит от изменения частоты сети. Таким образом обмотки статора асинхронного двигателя запитываются переменными токами разных частот, одна из которых получается умножением другой частоты на постоянный коэффициент. Частота колебаний вала при этом регулируется посредством изменения коэффициента умножения k, а стабильность колебаний определяется разрядностью счетчиков и достигает 0,01%The device improves the stability of the oscillations of the motor shaft. This is achieved by the fact that the excitation winding of a two-phase induction motor is directly connected to the mains supply, and the control winding through a frequency converter, which consists of a master oscillator, three frequency dividers - with adjustable (n1), with constant (n2) and variable division factors, counter pulses. The generator is connected to frequency dividers with adjustable and constant division factors, the output frequencies of the dividers will be f1 and f2, respectively. The pulse counter determines the number of pulses of frequency f1 during the half-period of the voltage supplying the field winding. The result of the counter operation - the number N - is the number of frequency pulses f1 in each half-period of the voltage supplying the motor excitation winding. The number N is a variable reference coefficient (changes when the network frequency changes) for a divider with a variable reference coefficient, at the output of which as a result of division we get fз = k • fc, where k = n1 / n2. The shaft oscillation frequency fк = fз-fc does not depend on a change in the network frequency. Thus, the stator windings of an induction motor are powered by alternating currents of different frequencies, one of which is obtained by multiplying the other frequency by a constant coefficient. The oscillation frequency of the shaft is regulated by changing the multiplication coefficient k, and the stability of the oscillations is determined by the capacity of the counters and reaches 0.01%
RU94028937A 1994-08-02 1994-08-02 Device for control of two-phase induction motor in oscillation mode RU2082277C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94028937A RU2082277C1 (en) 1994-08-02 1994-08-02 Device for control of two-phase induction motor in oscillation mode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94028937A RU2082277C1 (en) 1994-08-02 1994-08-02 Device for control of two-phase induction motor in oscillation mode

Publications (2)

Publication Number Publication Date
RU94028937A true RU94028937A (en) 1996-05-27
RU2082277C1 RU2082277C1 (en) 1997-06-20

Family

ID=20159292

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94028937A RU2082277C1 (en) 1994-08-02 1994-08-02 Device for control of two-phase induction motor in oscillation mode

Country Status (1)

Country Link
RU (1) RU2082277C1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2587545C1 (en) * 2015-01-30 2016-06-20 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский политехнический университет" Control device of two-phase asynchronous motor in oscillating flow mode
RU2592080C1 (en) * 2015-03-17 2016-07-20 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский политехнический университет" Oscillating rotary motion electric drive
RU2636806C2 (en) * 2016-05-17 2017-12-01 Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский политехнический университет" Valve electric drive of oscillatory motion

Also Published As

Publication number Publication date
RU2082277C1 (en) 1997-06-20

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