Each of the following components belongs to one of the two groups controlled con

Question

Each of the following components belongs to one of the two groups controlled conducting component and switching component A controlled conducting component is used for delivering power when it is turned on A switching component is used at the place where the conducting is only momentary for trigging another component Identify the components by label each of them with a "C" for a controlled conducting component or a "S" for a switching component The given waveform is a current flowing through a component This component must be a Zener diode SUS SCR triac List four types of triac's firing mode. What is the difference between breakdown and breakover for an SUS?

Explanation / Answer

1.)SCR is a "S" device that is SCR is a switching component.

UJT is  a "C" device that is UJT is a controlled conducting component.

TRIAC is  a "C" device that is UJT is a controlled conducting component.

TRANSISTOR is a "S" device that is TRANSISTOR is a switching component.

A FOUR LAYER DIODE IS A nothing but a Shockley diode it is well known for its high switching speed.

2.) The current waveform which is shown belongs to triac. That is it is a TRIAC current waveform

3.) The TRIAC operates in four modes by taking With M1 as reference,
1. M2 positive, gate positive, quadrant 1
2. M2 positive, gate negative, quadrant 2
3. M2 negative, gate negative, quadrant 3
4. M2 negative, gate positive, quadrant 4,
A TRIAC can be triggered in both phases of an AC signal so it has this advantage over a SCR.

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