V-I Characteristics of TRIAC
TRIAC is comprised of two SCRs in backwards equal. It works in four modes. At first the TRIAC works in forward and turn around impeding mode and just little spillage current moves through it. At the point when the applied voltage at the MT2 terminal is additionally expanded and when it crosses the breakover voltage TRIAC begins conduction. The ongoing begin to flow and the voltage applied at the gate terminal controls this current flow.
First Quadrant (I)
- In this quadrant, both MT1 (Main Terminal 1) and MT2 (Mian Terminal 2) are positive concerning the gate terminal.
- At the point when a positive voltage is applied to the gate terminal concerning MT2, the TRIAC becomes forward-one-sided, permitting current to flow.
- The TRIAC conducts during the positive half-cycle of the AC waveform.
Second Quadrant (II)
- MT1 is negative, and MT2 is positive concerning the gate terminal.
- Applying a positive voltage to the gate terminal as for MT1 triggers the TRIAC to lead.
- The gadget conducts during the negative half-cycle of the AC waveform.
Third Quadrant (III)
- Both MT1 and MT2 are negative concerning the gate terminal.
- A negative voltage applied to the entryway terminal as for MT2 makes the TRIAC lead during the positive half-cycle.
- This quadrant permits control of force in the negative half-pattern of the AC waveform.
Fourth Quadrant (IV)
- MT1 is positive, and MT2 is negative concerning the gate terminal.
- A negative voltage applied to the entryway terminal regarding MT1 makes the TRIAC lead during the negative half-cycle.
- This quadrant empowers control of force in the positive half-pattern of the AC waveform.
TRIAC
We know that a unidirectional device like a SCR incorporates the characteristics of the reverse blocking current since it stops the progression of current in a reverse-biased state however for a few applications, this sort of current control is essential, particularly in AC circuits. So this can be accomplished through SCRs, where the association of two SCRs ought to be finished in enemy of lined up for controlling over both positive as well as bad information half cycles. However, this game plan can be changed through a unique semiconductor device called TRIAC, used to accomplish bidirectional control. This device controls the air conditioner unequivocally and every now and again utilized in controlling the speed of the engine, AC control devices, AC circuits, light dimmers, pressure control systems, and so on.
In this Article We will be Going Through TRIAC (Triode for Alternating Current), We will go through the Types of TRIAC, Characteristics of TRIAC, How to Trigger the TRIAC, TRIAC Dimming and at last we will Conclude our Article With its Applications, Advantages, Conclusion and Some FAQs.
Table of Content
- Construction
- Triggering of TRIAC
- Types
- TRIAC Dimming
- Advantages
- Disadvantages
- Applications
- TRIAC Vs Thyristor