How does light triggering of a thyristor differ from gate triggering
Answers
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Today, the world is witnessing energy crises. This necessitates the efficient utilization of electrical energy. Power electronics helps in accomplishing this task of efficient energy usage. Thyristor is an important family of devices in power electronic system. SCR (Silicon Control Rectifier) is an important device in the thyristor family. As the SCR is used more widely hence SCR is known as a thyristor.
Applications of power electronics deals with the flow of electronic power. In order to achieve better efficiency the semiconductor devices used in power electronic system are operated as switches. One of the semiconductor device used in a power electronic system is thyristor. Few of the other devices used as switches are diodes, Bipolar Junction Transistors (BJTs), Metal Oxide Semiconductor Field Effect Transistor (MOSFET), Insulated Gate Bipolar Transistor (IGBT), Gate Turn Off Thyristor (GTOs).
The term thyristor is a general name for a family of semiconductor device. Thyristor families consist of large number of switching devices. A thyristor is a solid state power semiconductor device. It has four alternating layer and three junctions J1, J2, J3 of N type semiconductor and P type semiconductor material. A thyristor has three terminals. Namely anode, cathode and gate. Thyristor acts as a bistable switch, conducts when its anode is made positive with respect to cathode and gate signal (between gate terminal and cathode terminal) is applied.
Thyristor
Concept Introduction:
The most effective and popular way to trigger a thyristor or SCR is using a gate trigger. A sufficient voltage on the gate electrode contributes some electrons to the J2 connection while the thyristor is forward biassed.
Explanation:
We have been given a question about gate triggering.
We have to find how does light triggering of a thyristor differ from gate triggering.
By raising the anode current that passes through the thyristor, it is turned on. There are numerous ways to boost anode current.
Final Answer:
By raising the anode current that passes through the thyristor, it is turned on.
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