SU1274100A1

SU1274100A1 - Electric drive

Info

Publication number: SU1274100A1
Application number: SU843705128A
Authority: SU
Inventors: Константин Валентинович Коломойцев
Original assignee: Ивано-Франковский Институт Нефти И Газа
Priority date: 1984-03-01
Filing date: 1984-03-01
Publication date: 1986-11-30

Abstract

Изобретение относитс к электротехнике и может быть использовано в электроприводах общепромьштенных механизмов. Целью изобретени вл етс упрощение и уменьшение массогабаритных показателей. Указанна цель обеспечиваетс за счет использовани конденсатора как в пусковом, так и в тормозном режимах. 1 ил.The invention relates to electrical engineering and can be used in electric drives of general mechanisms. The aim of the invention is to simplify and reduce the weight and size parameters. This target is achieved by using a capacitor in both the starting and braking modes. 1 il.

Description

Изобретение относится к электротехнике и может быть использовано в электроприводах общепромышленных механизмов.The invention relates to electrical engineering and can be used in electric drives of general industrial mechanisms.

Целью изобретения является упрощение и уменьшение массогабаритных показателей.The aim of the invention is the simplification and reduction of overall dimensions.

На Чертеже представлена схема электропривода.The drawing shows a diagram of an electric drive.

Электропривод содержит однофазный асинхронный электродвигатель 1, пусковая обмотка 2 и рабочая обмотка 3 которого соединены последовательно, средняя точка соединения пусковой и рабочей обмоток 2 и 3 через первый замыкающий контакт 4 снабжена зажимом для подключения к источнику питания, первый и второй последовательно соединенные диоды 5, 6, анод первого диода 5 через параллельно соединенные между собой конденсатор 7 и резистор 8 соединен с катодом второго диода бис подвижным выводом первого замыкающего контакта 4, неподвижный вывод второго замыкающего контакта 9 снабжен зажимом для подключения к источнику питания, подвижный вывод второго замыкающего контакта 9 сблокирован с подвижным выводом первого замыкающего контакта 4 и соединен с крайним выводом рабочей обмотки 3 электродвигателя и с общей точкой соединения анодов первого диода 5 и третьего диода 10, катод третьего диода 10 соединен с крайним выводом пусковой обмотки 3 и с анодом четвертого диода 11, катод которого соединен с катодом второго диода 6.The electric drive contains a single-phase asynchronous motor 1, the starting winding 2 and the working winding 3 of which are connected in series, the midpoint of the starting and working windings 2 and 3 through the first make contact 4 is equipped with a clamp for connecting to a power source, the first and second series-connected diodes 5, 6 , the anode of the first diode 5 through a parallel connected capacitor 7 and a resistor 8 is connected to the cathode of the second diode bis by the movable terminal of the first make contact 4, the stationary terminal of the second the make contact 9 is equipped with a clamp for connecting to a power source, the movable output of the second make contact 9 is blocked with the movable output of the first make contact 4 and connected to the extreme output of the working winding 3 of the electric motor and to the common point of connection of the anodes of the first diode 5 and third diode 10, the cathode of the third diode 10 is connected to the extreme terminal of the starting winding 3 and to the anode of the fourth diode 11, the cathode of which is connected to the cathode of the second diode 6.

Устройство работает следующим образом.The device operates as follows.

При включении электродвигателя 1 замыкаются контакты 4 и 9, обтекается током рабочая обмотка 3 и пусковая обмотка 2, при этом положительная полуволна тока обмотки 2 проходит через диод 11, конденсатор 7, диод 5, а отрицательная - через диод 6, конденсатор 7, диод 10, конденсатор 7 обеспечивает фазовый сдвиг между токами пусковой и рабочей обмотками равным 90°, в результате чего двигатель запускается.When the motor 1 is turned on, contacts 4 and 9 are closed, the working winding 3 and the starting winding 2 are rounded by current, while the positive half-wave of the winding 2 current passes through diode 11, capacitor 7, diode 5, and the negative one passes through diode 6, capacitor 7, diode 10 , the capacitor 7 provides a phase shift between the currents of the starting and working windings equal to 90 °, as a result of which the engine starts.

7410074100

По истечении промежутка времени, определяемого емкостью конденсатора 7, диоды 5, 6, 10 и 11 запираются конденсатором 7, в результате проте5 кание тока через пусковую обмотку 2 прекращается. Пуск двигателя окончен При отключении двигателя от сети конденсатор 7 через контакты 4 и 9 подключается к зажимам рабочей об10 мотки 3, разряжается на рабочую обмотку 3, создавая тормозной момент на валу двигателя и подготавливая этим самым электродвигатель к повторному пуску. Исчезновение напряжения 15 питающей сети при работе двигателя приводит к разряду конденсатора 7 на резистор 8, в результате схема готова к повторному пуску.After a period of time determined by the capacitance of the capacitor 7, the diodes 5, 6, 10 and 11 are closed by the capacitor 7, as a result of which the current flow through the starting winding 2 stops. Starting the engine is finished When the engine is disconnected from the mains, the capacitor 7 is connected via terminals 4 and 9 to the terminals of the working winding 3 of the winding 3, discharged to the working winding 3, creating a braking torque on the motor shaft and thereby preparing the electric motor for restarting. The disappearance of the voltage 15 of the supply network during engine operation leads to the discharge of the capacitor 7 to the resistor 8, as a result, the circuit is ready for restarting.

Claims

The invention relates to electrical engineering - and can be used in electric drives of general mechanisms. The aim of the invention is to simplify and reduce the weight and size parameters. The layout of the electric drive is presented on the 1st page. The electric drive contains a single-phase asynchronous motor 1, the starting winding 2 and the working winding 3 of which are connected in series, the middle connection point of the starting and working windings 2 and 3 through the first closing contact 4 is provided with a clip for connecting to a power source, the first and the second diodes 5, 6, the anode of the first diode 5 through a capacitor 7 and a resistor 8 connected in parallel to each other with the cathode of the second diode bis by the moving output of the first closing contact 4, the stationary terminal of the second The closing contact 9 is provided with a clip for connecting to the power supply, the movable output of the second closing contact 9 is interlocked with the slide {1st branch of the first closing contact 4 and connected to the extreme output of the working winding 3 of the electric motor and to the common connection point of the anodes of the first diode 5 and the third diode 10, the cathode of the third diode 10 is connected to the extreme terminal of the starting winding 3 and to the anode of the fourth diode 11, the cathode of which is connected to the cathode of the second diode 6. The device operates as follows. When the motor is turned on, contacts 4 and 9 are closed, the working winding 3 and the start winding 2 flow around the current, the positive half-wave of the winding 2 passes through the diode 11, the capacitor 7, the diode 5, and the negative one - through the diode 6, the capacitor 7, the diode 10, the capacitor 7 provides a phase shift between the currents of the starting and working windings equal, as a result of which the motor is started. 00i After a period of time determined by the capacitance of the capacitor 7, the diodes 5, 6, 10, and 11 are closed by the capacitor 7, as a result of which the flowing current through the starting winding 2 stops. Starting the engine is over. When the engine is disconnected from the mains, the capacitor 7 is connected via contacts 4 and 9 to the terminals of the working winding 3, discharges to the working winding 3, creating a braking torque on the motor shaft and thus preparing the electric motor for restarting. The disappearance of the supply voltage when the engine is running leads to the discharge of the capacitor 7 to the resistor 8, as a result, the circuit is ready for re-start. The electric drive comprising a single-phase asynchronous electric motor, starting and working windings are connected in series, the middle connection point of the starting and working windings of the electric motor through the first closing contact is provided with a clip for connecting to the power source, the first and the second series-connected diodes, the anode of the first diode are connected in parallel between a capacitor and a resistor are connected to the cathode of the second diode and to a moving output of the closing contact, characterized in that In order to simplify and reduce mass and size parameters, the third and fourth diodes and the second closing contact are introduced into it, the fixed output of which is provided with a clip for connecting to the power supply, the movable output of the second closing contact is interlocked with the movable output of the first closing contact and connected to the extreme end of the working winding of the electric motor and with a common point of connection of the anodes of the first and third diodes, the cathode of the third diode is connected to the extreme terminal of the starting winding and the anode of the fourth diode, cathode which is connected to the cathode of the second diode. V -p