SU773537A1

SU773537A1 - Apparatus for determining current of holding power thyristors

Info

Publication number: SU773537A1
Application number: SU782677138A
Authority: SU
Inventors: Вадим Михайлович Бардин; Александр Григорьевич Миков; Борис Иванович Петров; Владимир Павлович Цетлин
Original assignee: Мордовский государственный университет им. Н.П.Огарева
Priority date: 1978-10-23
Filing date: 1978-10-23
Publication date: 1980-10-23

Description

1one

Изобретение относитс к устройствам дл измерени и контрол параметров полупроводниковых приборов при их изготовлении и массовом использовании , а также может быть ис- 5 пользовано дл исследовательских целей .The invention relates to devices for measuring and controlling parameters of semiconductor devices during their manufacture and mass use, and can also be used for research purposes.

Известно устройство дл измерени тока удержани (3. ) тиристоров,содержащее регулируемый источник по- 10 сто нного анодного тока, источник посто нного напр жени управлени и амперметр, включенный последовательно с испытуемым тиристором l .A device for measuring the holding current (3.) of a thyristor is known, which contains an adjustable source of direct anodic current, a source of direct voltage control and an ammeter connected in series with the test thyristor l.

Недостатком известного устройства вл етс то, что в процессе измерени через испытуемый тиристор пропускаетс посто нный ток, величина которого регулируетс (уменьшаетс до вручную, что приводит к неточ- 20 ному измерению , а также больша потребл ема мощность и низка производительность .A disadvantage of the known device is that during the measurement process a direct current is passed through the thyristor under test, the value of which is regulated (reduced to manual, which leads to inaccurate measurement, as well as high power consumption and low productivity.

Наиболее близким по технической сущности к предлагаемому вл етс 25 устройство дл измерени 3., содержгидее источник мощных импульсов анодного тока, источник сигналов управлени испытуемого тиристора, блок пускаf регулируемый источник посто нного анодного тока и амперметр дл измерени З.д 2 .The closest in technical essence to the present invention is 25 measuring device 3., contains a source of powerful anode current pulses, a source of control signals for the test thyristor, a start-up unit, an adjustable constant anode current source, and an ammeter for measuring H.d.

Недостатками такого устройства вл ютс низка точность измерени и мала производительность, св занные с ручной регулировкой анодного тока, визуальным контролем момента отключени испытуемого тиристора и индикацией Зч|д- ПС стрелочному прибору.The drawbacks of such a device are low measurement accuracy and low productivity associated with manual adjustment of the anode current, visual monitoring of the moment when the test thyristor is turned off, and the display of the Cp | d- PS switch instrument.

Цель изобретени - повышение точности и автоматизации измерени .The purpose of the invention is to improve the accuracy and automation of measurement.

Поставленна цель достигаетс тем, что в устройство, содержащее источник импульсов анодного тока, блок пуска, датчик тока, введены генератор линейно-падающего напр жени , два нуль-органа, триггер, измеритель временных интервалов, причем генератор соединен с источником импульсов анодного тока, блоком пуска,нуль-органом и через усилитель мощности с тиристором, второй нуль-орган соединен с датчиком тока) и оба нуль-органа через триггер соединены с измерителем временных интервалов.The goal is achieved in that a device containing a source of anodic current pulses, a start-up unit, a current sensor, a linear-incident voltage generator, two zero-organs, a trigger, a time interval meter, and a generator connected to an anodic current source, block start-up, null-organ and through a power amplifier with a thyristor, the second null-organ is connected to the current sensor) and both null-organs are connected to the time interval meter via a trigger.

Claims

FIG. 1 is a functional diagram of the proposed device; FIG. 2 - time diagrams that reflect his work. The device contains a source of 1 anodic current pulses, a 2-start block, a linear-voltage generator 3, a power amplifier 4, null organs 5 and 6, a current sensor on a resistor 7, a trigger 8, a time interval measurement block 9, and terminals 10-12 to connect the test thyristor (IT) 13. The device operates as follows. On a Start from block 2 signal, the control electrode of the thyristor 13 is energized, and the thyristor is unlocked. A current begins to flow through it, which is the sum of the currents of blocks 1 and 4. Source 1 forms a single impulse of power current — g of the co-formed form, and source 4 generates a current impulse of the linear-padak form. The duration of the flow of a linearly-falling current exceeds the duration of the flow of a power current, and its magnitude, when the power current is equal to zero, is certainly greater than the holding current. When the current flowing through the IT becomes equal to 3, the voltage on the resistor 7 becomes zero, and the zero-body sets trigger 8 to position 1. Reverse switching of the trigger occurs at the moment that the linear-drop voltage vanishes. As a result, the output of the trigger 8 p The time interval is measured, the duration of which is proportional to the magnitude of the non-holding current IT. Block 9 measures this time interval. The device provides measurement of the holding current of the thyristors on single current pulses with automatic generation of test signals and high measurement accuracy. Apparatus of the invention for measuring the holding current of power thyristors, comprising a start-up unit, a series-connected source of anodic current pulses, a current sensor, characterized in that, in order to improve the accuracy and automation of the measurement process, the device contains a linearly-drop voltage generator organ trigger, meter time intervals, and the generator is connected to a source of anode current pulses, block, start-up, zero-body and through a power amplifier the thyristor, the second null-organ is connected to the current sensor, and both null-organ through the trigger connected to the meter time intervals. Sources of information taken into account in the examination 1. Equipment and methods for monitoring the parameters of power semiconductor gates. M., Energie, 1971, p. 12.

2. Thyristors. Technical reference. Ed. Labuntsova, trans. from English M., Energie, 1971, p. 26 (prototype).

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