SU955520A1

SU955520A1 - Electronic commutator

Info

Publication number: SU955520A1
Application number: SU762315748D
Authority: SU
Inventors: Владимир Ильич Турченков
Original assignee: за витель В,И. Турченков
Priority date: 1976-01-22
Filing date: 1976-01-22
Publication date: 1982-08-30
Also published as: SU681546A1

Description

Изобретение относитс к электро- j технике и может быть использовано дл переключени мощных высоковольтных нагрузок на заланное врем , например, в устройствах автоматического регулировани двигателей посто нного тока.The invention relates to electrical engineering and can be used for switching high-power high-voltage loads at a predetermined time, for example, in devices for automatic control of direct current motors.

Известны переключатели высоковольтных нагрузок, выполненные на основе тиристоров Щ;Known switches high-voltage loads, made on the basis of the thyristors U;

Недостатками известных устройств вл ютс их мала мощность и сложность .The disadvantages of the known devices are their low power and complexity.

Известен- также переключатель высоковольтных нагрузок, выполненный в виде генератора импульсов, содержащего два тиристора с нагрузкгши в анодных цеп хj аноды которых соединены между собой через конденсатор, а катоды - с шиной источника питани , и пороговый элемент 23.Also known is a high-voltage switch, made in the form of a pulse generator containing two thyristors with loads in anode circuits, whose anodes are interconnected via a capacitor, and the cathodes are connected to the power supply bus, and the threshold element 23.

Однако это устройство имеет низкую стабильность скважности импульсов .However, this device has a low pulse duty cycle stability.

Цель изобретени - повыиение стабильности скважности импульсов.The purpose of the invention is to increase the stability of the pulse duty cycle.

Дл достижени указанной цели в электронном коммутаторе использован пороговый элементс S-образной вольтамперной характеристикой, выполнен|ный в виде блокинг-генератора на транзисторе, включенном по схеме с общей базой со стабилитроном в цепи базы, подключенным через две цепи, состо 1цие из последовательно соединенных диода, конденсатора и резистора, к шине источника питани , при этом точка соединени диода и конденсатора подключена через врем 10 эадакхф1й резистор к шине источника питёши и через разв зывающий диод к аноду соответствунвдего тиристора, а точка соединени конденсатора и. резистора - к управл ющему электроду To achieve this goal, a threshold element with an S-shaped volt-ampere characteristic was used in the electronic switchboard, made as a blocking generator on a transistor connected in a circuit with a common base with a zener diode in a base circuit connected through two circuits. a capacitor and a resistor to the power supply bus; the connection point of the diode and the capacitor is connected after 10 times a resistor to the power supply bus and through the decoupling diode to the anode thyristor is unavailable, and the capacitor junction and. resistor - to the control electrode

15 противоположного тиристора. 4 На чертеже показана принципиальна электрическа схе ма устройства15 opposite thyristor. 4 The drawing shows the basic electrical circuit of the device.

Электронный коммутатор содержит Electronic switch contains

20 тиристоры 1 и 2, аноды которых под- ключены к нагрузкам 3 и 4 и соединены между робой через коммутирующий конденсатор 5. При этом аноды тиристоров 1 и 2 через врем задак 191е дио25 ды 6 и 7 и конденсаторы 8 и 9 соответственно подключены к управл ющим электродам противоположных тиристоров . Верхние обкладки конденсаторов 8 и 9 через резисторы 10 и 11 20 thyristors 1 and 2, the anodes of which are connected to loads 3 and 4 and connected between the robot via switching capacitor 5. At that, the anodes of thyristors 1 and 2 through time 191e diodes 6 and 7 and capacitors 8 and 9, respectively, are connected to the controllers opposite thyristor electrodes. Top plates of capacitors 8 and 9 through resistors 10 and 11

Claims

30 are respectively connected to the power supply source bus 12, and their lower plates to the source bus 12 via resistor 13 and 14 and black diodes 15 and 16, and switch 17 to the threshold element 18, made in the form of a blocking generator on a transistor 19, containing in the base circuit a zener diode 20, and a pulse transformer 21. The device operates as follows. When the thyristor 2 is open, through the resistor 14, diode 7, the resistance of the load 3 flows from the source 12. Since the resistance of the load 3 (4) is much smaller than the resistance of the resistor 14 (13), the voltage on the bottom plate of the capacitor is close to zero. At this time, the diode 6 is locked by the source voltage applied to the load 4 through open thyristor 2. The capacitor 8 is discharged through time defining the resistor 13 and the small resistance of the resistor 10, while the voltage on the bottom plate of the capacitor 8 relative to the total ishna increases and is transmitted through the open diode 15 and the 3S1 closed switch 17 to the threshold element 18. When this voltage reaches the response threshold of the element 18, i.e. the voltage of the zener diode 20 becomes higher, the blocking process starts, during which the capacitor 8 is subsected through the threshold element 18, the diode 15 and the control electrode of the thyristor 1. The thyristor 1 is opened by the charge current of the capacitor 8. The voltage on the load 3 increases which leads to the thyristor locking. The capacitor 8 is charged before the voltage close to the voltage of the source 12, the diodes 16 and 7 at this closure. The capacitor 9 begins to discharge after the time of the set resistor 14 and the low resistance of the resistor. thyristor 2, h results in closing thyristor 1. Then the processes are repeated. In the proposed device, as part of an instrument with a 5-shaped volt-ampere characteristic, any element with an S-shape, a Neuvolt-ampere characteristic, and an input resistance, a large resistance of the resistors, the time of circuits, can be used; pulse duty cycle. If ko 1mutapop 17 is opened, the state of the thyristors does not change for an arbitrarily long time. When the switching switch 17 is switched off, the state of the thyristors changes as well. and then the work happens in a similar way. The stabilization of the pulse duty cycle is ensured by eliminating the influence of unstable thyristor switching thresholds. The stability of the 0.6OICH time intervals to be formed is determined by one common threshold element having a stable threshold. 1. Electronic switch, made in the form of a pulse generator, containing two thyristors with loads in the anode circuits, the anodes of which are interconnected through a capacitor, and the cathodes are connected to the power supply bus, and In order to increase the stability of the pulse ratio, a threshold element with a 5-shaped volt-ampere characteristic is used, connected to the power supply bus through two circuits consisting of a series-connected diode, a capacitor and a resistor / th point of connection of diode and capacitor of each circuit is connected through a resistor defining a time to the bus power source and through decoupling diode - to the anode of the corresponding thyristor and the point of connection of the capacitor and the resistor to the control electrode of the thyristor tsrotivopo- false. 2. A switch according to claim 1, characterized in that the threshold element with an S-shaped volt-ampere switch. the characteristic is made in the form of a blocking oscillator on a transistor connected in accordance with a common base circuit with a zener diode in the base circuit. Sources of information taken into account in the examination 1.Hesin A. .. Impulses technique. M., Energie, 1971, p. 103, fig. ZZv.

2. Authors certificate of the USSR 506937, cl. H 03 K 3/335, 1974 (prototype).