Thyristor Definition and 15 Threads

Hey folks. please help me out, I am having trouble finding the problem with a thyristor driver circuit. So this circuit has been working for many years without problems. It works from 2 of the 3 phases, so 400VAC (I am in Europe). The thyristor is in series with a large coil, aka electromagnet...

i have seen several videos of thyristors but they never really explain the fundamentals they just say that cause there is a current flowing in there it keeps being on but why does a transistor then turn off when you remove gate voltage

I have made following design to drive two high power hokeypuck SCRs to activate a Plasma compression coil. As long as catode falls below 0V, I do not know if it is needed to insert diodes from the optoisolated driver A1 (and A2) and the limiting current resistor R1 (and R2):

What is a thyristor and how do they work?

I am helping a group of my friends for writing microcontroller code for their final year project in EE. They are building a small model of HVDC system (fed from 3 phase supply), with microcontroller based converter and inverter. We are done with the coding for firing of the SCRs in the...

Hello, I was wondering if there is any way of increasing a transistor or thyristor maximum voltage ratting in DC? Thanks. Edit: Just to be more precise, I am referring to the off state. I know you can the on state via a resistor.

Beginner here. Learning about electronics. I would like to play with a thyristor, triac, diode, transistor, diode bridge, etc. using 1,5-9V batteries, wires, multimeter. I am buying a breadboard too. What kind of these you recommend for that purpose? There is a wide variety on the shelves please...

Hello, I was reading about the differences between Current Source Converters and Voltage source converters. One main difference was that Current source converters need to have a minimum DC power flow of 5-10% while VSC do not have a min flow requirement. It was also called a deadband. Why is...

Hi Guys, I am working on a Carver model M-1.0t stereo amp. There is no AC voltage to the input transformer primary. The AC input is controlled by a Bi-Directional Triode Thyristor. This is the data sheet. http://www.datasheet.hk/view_online.php?id=1927120&file=0465\sm16gz41_6629879.pdf This is...

Homework Statement For my coursework task, i am to quantify and discuss errors associated with an experimental procedure. This involved a thyristor control unit which allowed the firing angle of two thyristors (in a half controlled bridge rectifier) to be varied with a rotary dial or pot/rheo...

Hi, I want to use a 2n5062 thyristor as a switch to output a current when the thyristor is on. I have found a data sheet which has values for gate trigger current and holding current (200 microamp and 5 milliamperes) respectively. Am I correct in thinking I must apply at least the gate trigger...

I have tested this circuit on the computer and it works but when I try to make it both on a pcb and breadboard the circuit will not work at all. If i swap the thyristor - TIC106D - for a transistor - TIP121 - the circuit works fine so I think the problem can be isolated down to somewhere between...

Can anybody help me with this, please. I am supposed to design a soft starter to reduce inrush current from grid to the 3 phase induction machine. My understanding is that initially the high inrush current is blocked by thyristor and after a period of time the normal current is allowed to...

I just started working on a furnace that uses the puck type thyristors for the main power switching. Every now and then, one of them blows and we replace it. We ususally use a mega tester to test wheteher they have blown or not i.e. put 250V across and short the gate to the anode. A zero...

hello everybody! i am making a report on Static induction thyristor and about to end the report but i could't find the practical device number of the SITH so if anybody knows about this, kindly tell me?