Triggerening methods of SCR - Semiconductor Devices - Industrial Electronics

TL;DR

Learn about different methods like thermal, optical, forward voltage, DV by DT, and gate triggering to turn on SCR.

Transcript

click the bell icon to get latest videos from equator hello friends in this video we are going to see triggering methods of ser triggering methods are nothing but turning on methods of an SCR a CR can be turned on in a different way and which are those different ways that we are going to study in today's video so friends let's see which are the dif... Read More

Key Insights

• ❓ Thermal triggering in SCR utilizes increased junction temperature for carrier generation.
• 🕳️ Optical triggering converts photons to electron-hole pairs to trigger the SCR.
• ⚡ Forward voltage triggering uses breakover voltage to turn on the SCR.
• ⚡ DV by DT triggering method involves changing voltage rapidly to trigger the SCR.
• 🔬 Gate triggering is the most common and effective method for turning on SCR.
• 🎮 Different gate triggering methods will be explored in future videos.
• 🉐 Each triggering method has its advantages and disadvantages in SCR applications.

Questions & Answers

Q: What is thermal triggering in SCR?

Thermal triggering in SCR involves increasing junction temperature to generate carriers, leading to an increase in leakage current and ultimately turning on the SCR.

Q: How does optical triggering work in SCR?

Optical triggering in SCR uses high-intensity light to convert photons into electron-hole pairs near the junction, increasing leakage current and potentially turning on the SCR.

Q: What is forward voltage triggering in SCR?

Forward voltage triggering in SCR involves applying a voltage higher than the breakover voltage across the anode-cathode terminals to trigger conduction and turn on the SCR.

Q: How does DV by DT triggering method work in SCR?

DV by DT triggering in SCR involves rapidly changing the voltage across the SCR, causing a surge in current flow and triggering the SCR without the need for gate current.

Summary & Key Takeaways

• Different methods like thermal, optical, forward voltage, DV by DT, and gate triggering are used to turn on an SCR.

• Thermal triggering involves increasing junction temperature to generate carriers for current flow.

• Optical triggering uses high-intensity light to convert photons into electron-hole pairs to turn on an SCR.