SU720654A1

SU720654A1 - Reversible a-c electric motor

Info

Publication number: SU720654A1
Application number: SU731892297A
Authority: SU
Inventors: Владимир Петрович Першин
Original assignee: Pershin Vladimir P
Priority date: 1973-03-16
Filing date: 1973-03-16
Publication date: 1980-03-05

Description

(54) РЕВЕРСИВНЫЙ ЭЛЕКТРОПРИВОД ПЕРЕМЕННОГО ТОКА(54) AC REVERSIBLE ELECTRIC DRIVE

JJ

Предложенный реверсивный электропривод переменного тока малой мощности предназначен дл использовани в устройствах различного назначени , в которых необходимо иметь электропривод переменного тока с широк- диапазоном регулировани скорости .The proposed reversible low-power AC electric drive is intended for use in devices of various purposes, in which it is necessary to have an AC electric drive with a wide range of speed control.

Известны реверсивные электроприводы переменного тока, содержащие усилители переменного тока, выходные каскады которых нагружены обмотками реверсивных двигателей малой мощности 1. Эти электроприводы имеют узкий диапазон регулировани скорости.Known are reversible AC drives, containing AC amplifiers, whose output stages are loaded with windings of low-power reversible motors 1. These drives have a narrow range of speed control.

Наиболее близок по техническому выполнению к предложенному электропривод переменного тока 2, содержащий ламповый двухполупериодный управл емый выпр митель , нагрузкой которого вл етс обмотка реверсивного двигател .The closest in technical implementation to the proposed AC drive 2, which contains a lamp full-wave controlled rectifier, the load of which is the winding of the reversing motor.

Этот электропривод переменного тока также имеет узкий диапазон регулировани скорости.,This AC drive also has a narrow speed control range.,

Цель изобретени - расширение диапазона регулировани скорости.The purpose of the invention is to expand the range of speed control.

Поставленна цель достигаетс тем, что в предложенном реверсивном электроприводе переменного тока малой мощности двухполупериодный выпр митель выполнен по мостовой схеме, два плеча которой составл ют обмотки трансформатор, два другие плеча - ламповые триоды, в диагональ включена управл юща обмотка двигател . Сетки обоих триодов соединены между собой ис анодом тиратрона, катод которого через RC-контур соединен с анодами двухThe goal is achieved in the proposed low-power AC reversible drive, the full-wave rectifier is made according to a bridge circuit, the two arms of which comprise a transformer winding, the other two arms are lamp triodes, and the control winding of the motor is included in the diagonal. The grids of both triodes are interconnected by the anode of a thyratron, the cathode of which is connected via an RC circuit to the anodes of two

диодов, катодами подключенных ко второй диагонали выпр мительного моста. Между сетками к катодами триодов включен сеточный резистор, который соедин ет анод тиратрона с управл ющей обмоткой двигател .diodes, cathodes connected to the second diagonal rectifier bridge. Between the grids to the cathodes of the triodes, a grid resistor is connected, which connects the anode of the thyratron to the control winding of the motor.

На чертеже изображена принципиальна схема электропривода.The drawing shows a schematic diagram of the drive.

Claims

The electric drive consists of a full-wave controlled rectifier formed by a lamp 1, a transformer 2 and a grid resistor 3; a thyratron amplifier consisting of a thyratron 4, resistors 5, 6, a capacitor 7, diodes 8 and 9, a reversing motor 10. When the signal at the input of the thyratron amplifier is equal to zero, the thyratron is closed by a negative voltage. Through the control winding of the motor, a double frequency current and a constant component current flow, creating a braking torque. Engine rotor stopped. When a control signal is applied to the input of a thyratron amplifier of a certain magnitude and the phase of the thyratron, the current will be passed through the lock, depending on the phase coincidence, of one or the other half of the lamp. Through the control winding of the motor, a current pulses, generating a torque. The impulse rotor rotates at a certain angle. The rotational speed of the motor rotor depends on the magnitude of the control signal, the magnitude of the capacitor 11 and resistor 5, the frequency of the power source. The direction of rotation of the motor rotor depends on the phase of the control signal, whose frequency is equal to the frequency of the power source. The rotational speed of the motor rotor is controlled in a wide range by changing the magnitude of the control signal, and the direction of rotation is controlled by the phase of the control signal. Claims of the Invention A low-power alternating current electric drive with a wide speed control range, comprising a full-wave controlled rectifier and a thyratron amplifier, characterized in that, in order to provide a wide control range, the full-wave rectifier is designed according to a bridge circuit, the two arms of which is composed of a frame and a frame. the transformer, the other two arms are lamp triodes, and the control winding of the motor is included in the diagonal of the bridge, and the grids of both triodes are connected between minutes and a thyratron anode, a cathode through which the RC-circuit is connected to the anodes of two diodes with their cathodes connected to the second diagonal of the bridge rectifying unit, between the grids and cathodes transistors included resistor grid connecting the anode with the thyratron control winding. Sources of information taken into account in the examination 1. Klimovitsky M. D.,. Kopelovich A. L. Automatic control and regulation in ferrous metallurgy. M., “Energie, 1967, p. 83-175.

2. Kulikovskiy A.F. Automatic information-measuring devices. M., “Energie, 1966, p. 110-112 (prototype).