SU1511771A1

SU1511771A1 - Device for reinforcing d.c. eoectromagnet of a.c. contactor

Info

Publication number: SU1511771A1
Application number: SU884383551A
Authority: SU
Inventors: Владислав Григорьевич Вохмянин
Original assignee: В.Г.Вохм нин
Priority date: 1988-02-26
Filing date: 1988-02-26
Publication date: 1989-09-30

Abstract

Изобретение относитс к электроаппаратостроению и может быть использовано в электромагнитных приводах контакторов переменного тока. Целью изобретени вл етс расширение эксплуатационных возможностей путем обеспечени работы устройства вне зависимости от величины нагрузки. При замыкании ключа 7 управлени обмотка 5 электромагнита питаетс через тиристор 10 однополупериодным выпр мленным напр жением. После замыкани главного контакта 4 контактора и включени нагрузки 3 питание обмотки 5 осуществл етс через токоограничивающий резистор 8. 1 ил.The invention relates to electrical equipment and can be used in electromagnetic drives of AC contactors. The aim of the invention is to expand the operational capabilities by ensuring the operation of the device regardless of the magnitude of the load. When the control key 7 is closed, the winding 5 of the electromagnet is fed through the thyristor 10 with a half-wave rectified voltage. After the main contact 4 of the contactor is closed and the load 3 is switched on, the winding 5 is energized through a current-limiting resistor 8. 1 sludge.

Description

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Изобретение относитс к электро- аппаратостроению и может быть использовано в электромагнитных приводах контактеров переменного тока. The invention relates to electrical equipment and can be used in electromagnetic drives of alternating current contactors.

Цель изобретени - расширение эксплуатационных возможностей за счет обеспечени работы устройства вне зависимости от величины нагрузки.The purpose of the invention is the expansion of operational capabilities by ensuring the operation of the device, regardless of the magnitude of the load.

На чертеже представлена принципи- альна электрическа схема предлагаемого устройства дл форсировки электромагнита посто нного тока контактора переменного тока.The drawing shows the principal electrical circuit of the proposed device for forcing a direct current electromagnet of an alternating current contactor.

Устройство содержит источник питани переменного тока с нулевым 1 и фазным 2 зажимами, между которыми подключены последовательно соединенные нагрузка 3 и главный контакт 4 контактора , обмотка 5 которого шунтиро- вана диодом 6,;Нулевой провод 1 сети через последовательно соединенные контакт 7 управлени , обмотку 5 контактора , резистор 8 и диод 9 соединен с точкой соединени нагрузки 3 с главным контактом 4 контактора. Точка соединени обмотки контактора с резистором 8 через анод - катод тиристора 10 соединена с фазным проводом 2 сети. Точка соединени резис- тора 8 с диодом 9 через последователно соединенные диод 11 и резистор 12 соединена с управл ющим электродом тиристора 10.The device contains an AC power source with zero 1 and phase 2 terminals, between which are connected in series the load 3 and the main contact 4 of the contactor, the winding 5 of which is bypassed by the diode 6,; The neutral wire 1 of the network through the serially connected contact 7 of the control, winding 5 the contactor, the resistor 8 and the diode 9 are connected to the connection point of the load 3 with the main contact 4 of the contactor. The connection point of the winding of the contactor with the resistor 8 through the anode - cathode of the thyristor 10 is connected to the phase wire 2 of the network. The connection point of the resistor 8 to the diode 9 through a series-connected diode 11 and the resistor 12 is connected to the control electrode of the thyristor 10.

Устройство работает следующим об- разом.The device works as follows.

При замыкании контакта 7 управлени через катушку 5, резистор В, дио 11, резистор 12 включаетс тиристор 10 и в положительньй полупериод пи- тающего напр жени напр жение питани прикладываетс к катушке электромагнита . Этого напр жени достаточно дл разгона кор и срабатывани элерого выбираетс из расчета обеспечени тока удержани . Диод 6 служит дл устранени вибраций кор электромагнита . Предлагаемое устройство имеет более широкие функциональные возможности, чем известные.When the control contact 7 is closed through the coil 5, the resistor B, the diode 11, the resistor 12 turns on the thyristor 10 and in the positive half-period of the supply voltage, the supply voltage is applied to the coil of the electromagnet. This voltage is sufficient to accelerate the core and the aero effect is selected on the basis of the supply current. Diode 6 serves to eliminate vibrations of the electromagnet core. The proposed device has more functionality than known.

Claims

Invention Formula

A device for forcing a direct current electromagnet of an alternating current containing terminals for connecting an electromagnet winding, a main current contact, a load, zero and phase conductors of an alternating current power network, two diodes, a limiting resistor and a control contact, and terminals for connecting a main closure contact and terminals for connecting the load are connected in series, the specified series circuit is connected between the terminals for connecting the phase and neutral wires. network, the first diode is connected in parallel to the terminals for connecting the electromagnet winding, the first of which is connected to one output of the current-limiting resistor, and the second to one output of the control contact, which is different in that operation of the device, regardless of the magnitude of the load, a thyristor and a second resistor are inserted in it, and another control contact pin is connected to an output for connecting the neutral wire of the supply mains, another current terminal the pull-down resistor through the first diode is connected to the point of connection for connecting the main closing contact and the load and in series

ktromagnita. After the main 45 is closed, the second diode and the second contact of contact 4 of the contactor cannot be turned on, but the coil of the electromagnet continues to be energized by the mains voltage, but already through the current-limiting resistor 8, which is

torus - to the control electrode of the thyristor connected between the output for connecting the phase conductor of the power supply network and the first output for connecting the electromagnet winding.