SU1607066A1

SU1607066A1 - Device for controlling double-wound induction motor

Info

Publication number: SU1607066A1
Application number: SU853930566A
Authority: SU
Inventors: Игорь Александрович Литовкин; Игорь Григорьевич Переходник
Original assignee: Предприятие П/Я А-3592
Priority date: 1985-07-17
Filing date: 1985-07-17
Publication date: 1990-11-15

Abstract

Изобретение относитс к автоматике и телемеханике, в частности к устройствам дл управлени реверсивным пуском и торможением электроприводов. Цель изобретени - повышение надежности. Устройство дл управлени двухобмоточным асинхронным двигателем 1 содержит блок 2 управлени , снабженный общим выходом 2.1, а также имеющий три других выхода 2.2, 2.3, 2.4. Коммутирующие элементы 3, 4 выполнены на симисторах. Коммутирующий элемент 7 реализован на тиристоре. Встречно-параллельно тиристору включен выпр мительный элемент (диод) 8. Обмотки 5, 6 управлени двигател 1 одними выводами объединены и подключены к одному зажиму источника питани переменного тока. Первые выводы коммутирующих элементов 3, 4 зашунтированы фазосдвигающим элементом 9, например конденсатором. Катоды коммутирующих элементов 3, 4 и катод коммутирующего элемента 7 объединены и подключены к общему выходу 2.1 блока 2 управлени . Входные зажимы 10, 11 устройства соединены с двум входами блока 2 управлени . Блок 2 управлени содержит три канала, два из которых состо т из последовательно включенных транзистора и инвертора, а третий - из транзистора, элемента 2 И-НЕ и инвертора. 2 ил.The invention relates to automation and telemechanics, in particular to devices for controlling reversing start and braking of electric drives. The purpose of the invention is to increase reliability. The device for controlling a two-winding asynchronous motor 1 contains a control unit 2 equipped with a common output 2.1 and also having three other outputs 2.2, 2.3, 2.4. Switching elements 3, 4 are made on the triacs. The switching element 7 is implemented on the thyristor. A rectifying element (diode) 8 is connected in parallel to the thyristor. Windings 5, 6 of engine control 1 are connected by one of the terminals and connected to one terminal of an AC power source. The first terminals of the switching elements 3, 4 are bridged by the phase-shifting element 9, for example, a capacitor. The cathodes of the switching elements 3, 4 and the cathode of the switching element 7 are combined and connected to the common output 2.1 of the control unit 2. The input terminals 10, 11 of the device are connected to two inputs of the control unit 2. The control unit 2 comprises three channels, two of which consist of a series-connected transistor and an inverter, and the third one of a transistor, an AND-NOT element 2, and an inverter. 2 Il.

Description

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Claims

Claim

A device for controlling a two-winding asynchronous motor containing three switching elements, the first terminals of the first and second switching elements are shunted by a phase-shifting element and connected respectively to the first 5 terminals of the first and second control windings of the two-winding asynchronous motor, the second terminals of which are connected to one bus of the AC power source, the second terminals are connected to the first 5th terminal of the third switching element, and the control terminals of the switching elements are connected s respectively to the first, second and third outputs of the control unit, the first and second inputs of which are ₁₀ connected respectively to the first and second input terminals, characterized in that, in order to increase the reliability of the device, it is equipped with a rectifier element connected opposite to the third a switching element, the second terminal of which is connected to another bus of the AC power source, and the second terminals of the first and second switching elements are connected to an additional common output of the control unit Lenia, wherein the first and second switching elements formed on symistors.

2.1

Figure 2