SU650153A1 - Arrangement for protecting electric motor from abnormal modes - Google Patents
Arrangement for protecting electric motor from abnormal modesInfo
- Publication number
- SU650153A1 SU650153A1 SU772530642A SU2530642A SU650153A1 SU 650153 A1 SU650153 A1 SU 650153A1 SU 772530642 A SU772530642 A SU 772530642A SU 2530642 A SU2530642 A SU 2530642A SU 650153 A1 SU650153 A1 SU 650153A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- electric motor
- arrangement
- protecting electric
- phase
- abnormal modes
- Prior art date
Links
Landscapes
- Control Of Ac Motors In General (AREA)
Description
1one
Изобретение относитс к области электротехники и может найти применение дл защиты электродвигателей переменного тока .This invention relates to the field of electrical engineering and can be used to protect AC motors.
Известно устройство дл защиты электродвигател , содержащее трансформатор тока и напр жени в цепи статора и элемент совпадени 1.A device for protecting an electric motor is known, comprising a current transformer and voltage in a stator circuit and a coincidence element 1.
Наиболее близким к предлагаемому вл етс устройство дл защиты трехфазного электродвигател , содержащее фазочувствительный детектор, построенный на диодах , включенных в мостовую цепь, трансформатор тока, вторична обмотка которого подключена в одну из диагоналей мостовой цепи, интегрирующую RC-цепочку и исполнительный орган 2.Closest to the present invention is a device for protection of a three-phase electric motor containing a phase-sensitive detector built on diodes connected to a bridge circuit, a current transformer, the secondary winding of which is connected to one of the diagonals of the bridge circuit integrating an RC-chain and actuator 2.
Недостатками этих устройств вл ютс наличие ложных отключений и нестабильность работы при искажени х формы напр жени питающей сети.The disadvantages of these devices are the presence of false outages and the instability of work with distortions of the form of the supply voltage.
Цель изобретени - повыщение помехоустойчивости защиты при искажени х формы напр жени , питающего электродвигатель .The purpose of the invention is to increase the noise immunity of the protection in the event of distortions of the voltage supplying the electric motor.
С этой целью устройство дл защиты электродвигател переменного тока от аномальных режимов, содержащее трансформатор тока, включенный в одну из фаз питающей сети, к вторичной обмотке которого присоединены фазочувствительный орган и включенные последовательно друг другу интегрирующее звено и исполнительный орган , дополнительно снабл ено источникомTo this end, a device for protecting an AC electric motor from abnormal conditions, containing a current transformer included in one of the phases of the supply mains, to the secondary winding of which a phase-sensitive organ is connected and an integrating element and an actuator connected in series with each other are additionally provided with a source
питани , транзисторным усилителем и трансформатором опорного напр жени , первична обмотка которого подключена между фазой с трансформатором тока и любой другой фазой, его вторична обмоткаpower supply, transistor amplifier and a voltage transformer, the primary winding of which is connected between the phase with the current transformer and any other phase, its secondary winding
соединена с минусом источника питани и средней точкой фазочувствительного органа, выполненного из последовательно соединенных двух пар встречно-направленных диодов , одна из общих точек которых подключена через источник питани к интегрирующему звену, при этом транзисторный з силитель базой подключен к другой общей точке фазочувствительного органа, эмиттер присоединен к минусу источника питани , аconnected to the minus of the power source and the midpoint of a phase-sensitive organ made of two pairs of oppositely-directed diodes connected in series, one of the common points of which is connected to the integrator through a power source, while the transistor sillimeter is connected to the other common point of the phase-sensitive organ emitter attached to the minus power source, and
коллектор присоединен последовательно к интегрирующему звену.the collector is connected in series to the integrator.
На чертеже представлена схема предлагаемого устройства. Устройство содержитThe drawing shows a diagram of the proposed device. The device contains
трансформатор 1 тока, трансформатор 2 опорного напр жени , фазочувствительный орган 3, транзисторный усилитель 4, интегрирующее звено 5, источник 6 питани , резистор 7 установки сигнала срабатывани current transformer 1, reference voltage transformer 2, phase-sensitive organ 3, transistor amplifier 4, integrating element 5, power source 6, response signal setting resistor 7
защиты и исполнительный орган 8.protection and executive body 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772530642A SU650153A1 (en) | 1977-10-05 | 1977-10-05 | Arrangement for protecting electric motor from abnormal modes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772530642A SU650153A1 (en) | 1977-10-05 | 1977-10-05 | Arrangement for protecting electric motor from abnormal modes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU650153A1 true SU650153A1 (en) | 1979-02-28 |
Family
ID=20727589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU772530642A SU650153A1 (en) | 1977-10-05 | 1977-10-05 | Arrangement for protecting electric motor from abnormal modes |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU650153A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4420787A (en) * | 1981-12-03 | 1983-12-13 | Spring Valley Associates Inc. | Water pump protector |
| US4667186A (en) * | 1985-03-13 | 1987-05-19 | Raychem Corporation | Phase difference fault detector |
| US4841404A (en) * | 1987-10-07 | 1989-06-20 | Spring Valley Associates, Inc. | Pump and electric motor protector |
-
1977
- 1977-10-05 SU SU772530642A patent/SU650153A1/en active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4420787A (en) * | 1981-12-03 | 1983-12-13 | Spring Valley Associates Inc. | Water pump protector |
| US4667186A (en) * | 1985-03-13 | 1987-05-19 | Raychem Corporation | Phase difference fault detector |
| US4841404A (en) * | 1987-10-07 | 1989-06-20 | Spring Valley Associates, Inc. | Pump and electric motor protector |
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