RU2007121018A - MOTOR PROTECTION DEVICE - Google Patents
MOTOR PROTECTION DEVICE Download PDFInfo
- Publication number
- RU2007121018A RU2007121018A RU2007121018/09A RU2007121018A RU2007121018A RU 2007121018 A RU2007121018 A RU 2007121018A RU 2007121018/09 A RU2007121018/09 A RU 2007121018/09A RU 2007121018 A RU2007121018 A RU 2007121018A RU 2007121018 A RU2007121018 A RU 2007121018A
- Authority
- RU
- Russia
- Prior art keywords
- operational amplifier
- inputs
- outputs
- electric motor
- output
- Prior art date
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- Protection Of Generators And Motors (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Устройство для защиты электродвигателя, содержащее трансформаторы тока для подключения в разные фазы питания электродвигателя, выпрямитель, входы которого подключены к выходам соответствующих трансформаторов тока, блок контроля перегрузки, входы которого подключены к выходам выпрямителя, блок формирования времятоковой характеристики, состоящий, в свою очередь, из теплового имитатора электродвигателя, выполненного на операционном усилителе с отрицательной обратной параллельной RC-связью, и компаратор, входы блока формирования подключены к выходам блока контроля перегрузки, а выходные нормально разомкнутые контакты которого соединены последовательно с обмоткой исполнительного реле, образованная при этом последовательная цепь подключена к источнику напряжения, отличающееся тем, что в тепловой имитатор введен второй операционный усилитель с отрицательной обратной параллельной RC-связью, инвертирующий вход которого подключен к выходу первого операционного усилителя, а выход второго - к входу первого операционного усилителя.A device for protecting an electric motor, comprising current transformers for connecting the electric motor to different phases, a rectifier, the inputs of which are connected to the outputs of the respective current transformers, an overload control unit, the inputs of which are connected to the outputs of the rectifier, a time-current characteristic generating unit, which, in turn, consists of a thermal simulator of an electric motor made on an operational amplifier with negative negative parallel RC connection, and a comparator, inputs of the connection forming unit the outputs of the overload control unit, and the output normally open contacts of which are connected in series with the actuator relay winding, the serial circuit formed in this case is connected to a voltage source, characterized in that a second operational amplifier with negative parallel inverse RC coupling is introduced into the thermal simulator, which inverts the input of which is connected to the output of the first operational amplifier, and the output of the second to the input of the first operational amplifier.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007121018/09A RU2350001C1 (en) | 2007-06-04 | 2007-06-04 | Electrical motor protection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007121018/09A RU2350001C1 (en) | 2007-06-04 | 2007-06-04 | Electrical motor protection device |
Publications (2)
Publication Number | Publication Date |
---|---|
RU2007121018A true RU2007121018A (en) | 2008-12-10 |
RU2350001C1 RU2350001C1 (en) | 2009-03-20 |
Family
ID=40545430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU2007121018/09A RU2350001C1 (en) | 2007-06-04 | 2007-06-04 | Electrical motor protection device |
Country Status (1)
Country | Link |
---|---|
RU (1) | RU2350001C1 (en) |
-
2007
- 2007-06-04 RU RU2007121018/09A patent/RU2350001C1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
RU2350001C1 (en) | 2009-03-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20090605 |