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Power Semiconductor Devices

Difference Between SCR and LASCR

October 4, 2022July 8, 2022
Difference Between SCR and LASCR

LASCR (light-activated SCR) is also a type of thyristor made up of semiconductor material that turns ON when light radiations fall on it. LASCR is almost similar to SCR except it will turn ON only when exposed to sunlight.

Categories Power Semiconductor Devices, Comparisons

SCR Triggering using UJT – Circuit and Working

September 15, 2022July 7, 2022
SCR Triggering Using UJT

To fire the SCR, a short-time current pulse at its gate is to be applied. The delay of firing and controlling the instant at which the pulse occurs within each half cycle is to be provided by the firing circuit.

Categories Power Electronics, Power Semiconductor Devices

Temperature or Thermal Ratings of Thyristor or SCR

September 15, 2022April 1, 2022
Temperature or Thermal Ratings of Thyristor or SCR

All thyristors will have their own capability and they must be operated in their definite capability limits known as ratings. If a thyristor is

Categories Power Semiconductor Devices, Power Electronics

Firing Circuits of Thyristor or SCR – R, RC & UJT Triggering

September 15, 2022March 30, 2022
Firing Circuits of Thyristor or SCR - R, RC & UJT Triggering

The circuit used for turning ON the thyristor by giving gate pulses is called the Firing or Triggering Circuit of SCR.

Categories Power Semiconductor Devices, Power Electronics

Class C or Complementary Commutation of Thyristor – Circuit & Working

September 16, 2022December 8, 2021
Class C or Complementary Commutation of Thyristor - Circuit & Working

In class A and class B commutation methods discussed in the earlier articles, there is only one SCR used, …

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Categories Power Semiconductor Devices, Power Electronics

Class-B or Resonant Pulse Commutation of Thyristor or SCR

September 16, 2022December 7, 2021
Class-B or Resonant Pulse Commutation of Thyristor or SCR

The class-B commutation of the thyristor is also called Resonant Pulse Commutation or Current Commutation. It is a type of forced commutation technique that uses a charged

Categories Power Semiconductor Devices, Power Electronics

Snubber Circuit – its Necessity, Design and Working

September 16, 2022December 5, 2021
Snubber Circuit – its Necessity, Design and Working

A snubber circuit is a protective circuit used to protect the SCR from false triggering and transient overvoltages. It basically consists of a

Categories Power Semiconductor Devices, Power Electronics

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