Importance of Gate Signal in SCR
SCR is simply a conventional rectifier controlled by a gate signal. However, the application of a forward voltage is not enough for conduction of SCR. Hence, a gate signal is applied to control SCR from an off state to the on state for a small period of time for which the anode current becomes equal to the latching current. Once the anode current attains this value, the gate losses the control and hence can be removed. If the anode current decreases to a value called as holding current, the SCR will go back to the forward blocking state(region in which SCR does not conduct any current expect a very small value of the leakage current). Under such condition care must be taken that, the gate signal is present until the anode current rises to the latching current, so as to assure that the complete turn-on of the SCR. Hence, the gate signal controls the rectifier conduction.
Silicon Controlled Rectifier
The SCR or thyristor is one type of semiconductor device and using in high-power switching applications is exceptionally planned. The working of this device should be possible in a switching mode only and acts as a switch. When the SCR is triggered by its gate terminal into the transmission, then it will supply the current constantly. While planning a SCR or Thyristor circuit, exceptional focus ought to be expected for enacting the circuit. This article examines various techniques for SCR setting off or SCR turn ON strategies or setting off of Thyristors. There are different setting off strategies are accessible in light of different substances which incorporate temperature, voltage, and so on.
Table of Content
- Silicon Controlled Rectifier
- Key Terminologies
- Construction
- Operation
- Modes of Operation
- Types
- Advantages of SCR