SU56023A1 - Device for disconnecting an asynchronous motor from the mains when it is braked by countercurrent - Google Patents

Device for disconnecting an asynchronous motor from the mains when it is braked by countercurrent

Info

Publication number
SU56023A1
SU56023A1 SU21048A SU56023DA SU56023A1 SU 56023 A1 SU56023 A1 SU 56023A1 SU 21048 A SU21048 A SU 21048A SU 56023D A SU56023D A SU 56023DA SU 56023 A1 SU56023 A1 SU 56023A1
Authority
SU
USSR - Soviet Union
Prior art keywords
mains
countercurrent
braked
disconnecting
asynchronous motor
Prior art date
Application number
SU21048A
Other languages
Russian (ru)
Inventor
Л.Б. Гейлер
Original Assignee
Л.Б. Гейлер
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Л.Б. Гейлер filed Critical Л.Б. Гейлер
Application granted granted Critical
Publication of SU56023A1 publication Critical patent/SU56023A1/en

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Description

Известны схемы торможени  асинхронных двигателей противотоком, в которых дл  отключени  двигател  от сети ири прохождении скорости через нуль примен етс  сид ща  на валу двигател  и присоединенна  к сети вспомогательпа  асинхронна  машина, к контактным кольцам которой присоединено реле напр жени . Последнее должно действовать при наивысшем напр жении на контактных кольцах, т. е. в момент, когда скорость затормажнваемого двигател  снижаетс  до нулл.Known schemes for deceleration of asynchronous motors by countercurrent, in which to disconnect the motor from the mains and speed through zero are used sitting on the motor shaft and connected to the mains auxiliary asynchronous machine, to the contact rings of which a voltage relay is connected. The latter should act at the highest voltage on the slip rings, i.e., at the moment when the engine braking speed drops to zero.

В действительности, указанное реле в зоне малых скоростей двигател  работает очень неустойчиво и нечетко, вследствие чего описанна  схема ке получила на практике достаточного распространени .In fact, the indicated relay in the zone of low engine speeds is very unstable and unclear, as a result of which the scheme described has not been widely spread.

Предметом изобретени   вл етс  усовершеиствованна  схема подобного торможени . Усовершенствование заключаетс  в том, что к контактным кольцам машины, согласно изобретению , нрисоедин етс  вспомогательный резонансный контур, состо щий из емкости и самоиндукции (дроссел ), рассчитанный на возникновение резонанса напр жений при частоте 50 пер/сек, (т. е. в момент остановки вала затормаживаемого двигател ). В соответствии с этим, реле напр жени  присоедин етс  не непосредственно к контактным кольцам асинхронной машины, а. параллельно к дросселю.The subject of the invention is an improved circuit for such braking. The improvement is that an auxiliary resonant circuit consisting of a capacitance and self-induction (throttle), designed for the occurrence of voltage resonance at a frequency of 50 lane / s, (i.e. at stopping the shaft of the engine being braked). Accordingly, the voltage relay is not connected directly to the slip rings of the asynchronous machine, but. parallel to the throttle.

При TaKoii схеме обеспечиваетс  точное , надежное и четкое срабатывание е ISWith the TaKoii circuit, accurate, reliable and precise e-IS triggering is provided.

Предмет изобретени .The subject matter of the invention.

Устройство дл  отключе55П.  асинхоонного двигател  от сети при торможении его противотоком с использованием дл  этой цели насаженной на вал двигател  вспомогательной асинхронной машины, у которой статор (или ротор) приключен к питающей двигатель сети, а к ротору (или, соответственно , к статору) подключено реле напр жени , отличающеес  тем, что реле напр жени  присоединено к вспомогательной асинхронной машине не непосредственно, а через посредство резонансного контура, состо щего из емкости и самоиндукции и рассчитанного на возникновение резонанса напр жений при частоте, равной частоте тока в сети, с целью обеспечени  действи  реле при прохождении скорости двигател  через нулевое значение.Device for disconnecting 55P. asynchoon motor from the mains when braking it with countercurrent using for this purpose an auxiliary asynchronous machine mounted on the motor shaft, in which the stator (or rotor) is connected to the mains supplying motor, and a voltage relay is connected to the rotor, or characterized in that the voltage relay is connected to an auxiliary asynchronous machine not directly, but through a resonant circuit consisting of capacitance and self-induction and calculated for the occurrence of voltage resonance at a frequency equal to the frequency of the current in the network, in order to ensure the operation of the relay when the engine speed passes through a zero value.

SU21048A 1939-01-13 1939-01-13 Device for disconnecting an asynchronous motor from the mains when it is braked by countercurrent SU56023A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU56023T 1939-01-13

Publications (1)

Publication Number Publication Date
SU56023A1 true SU56023A1 (en) 1939-11-30

Family

ID=52785414

Family Applications (1)

Application Number Title Priority Date Filing Date
SU21048A SU56023A1 (en) 1939-01-13 1939-01-13 Device for disconnecting an asynchronous motor from the mains when it is braked by countercurrent

Country Status (1)

Country Link
SU (1) SU56023A1 (en)

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