This is an in depth look at how the silicon controlled rectifier works. I explain it's basic operation and uses as well as demonstrate this component in a simple circuit.
Thanks for explaining this. I was troubleshooting a non functioning AC to DC variable speed motor control (for a pottery wheel) which had some circuitry that I wasn't familiar with. it had two S4020L thyristors in it, and I couldn't find any mention of them in the circuit simulators I usually work with. Your video helped me to understand how these are used to both rectify and regulate the speed of a motor. And as an added bonus, helped me to isolate the burned out components. (Burned out resistors on the gate channel.)
Great Video although it seems it has been awhile since you have posted, this video was very helpful. Watching your older videos to now you have really grown from a pupil to a teacher. I think you really have a knack for teaching. You should post more!
SCRs were used in forklifts for PWM series motor control for traction and lift hydraulics. Some operate at very high currents between 12 and 80 VDC. GE made a whole range of them for many decades. They were popular because high amperage transistors were cost prohibitive until fairly recently. Prior to SCR most used giant resistors with shorting solenoids for the "gears". Very bumpy. SCR made it feel more like a proper accelerator. It is clunky what needs to happen just to shut the main SCR down in the systems. Transistors are nice and neat lol.
Good explanation, you should probably plan your explanation so that you do not repeat the same concept in a different manner. This video is essentially 7-10 actual minutes. But still great video, hope you appreciate some constructive criticism. And this video only got 270 views, i hate this world.
Why cant you talk about it while youre on it already? You should site examples by showing numerical computaions instead of cloud explanations. I like the way The Organic Chemistry guy teaches.
You too same as all of youtube teachers, why don't you tell that what and how it happens when gate signal is applying and off the gate. All are reading only from the book but not one has said actually reason .! Its really bad
Quince brietny I really can't understand what you are trying to say but I explain literally down to the electrons if you watch all my semiconductor videos. There are multiple videos that go along with this. I explain why it works quite detailed. Watch my other videos if you want a deeper explanation as to why this device behaves how it does.
Quince brietny the SCR is a latching device. Once current starts flowing it will not stop until the current reaches 0 for a specific amount of time. I am sure I explained this in the video.
@@gnquince When you forward bias an SCR you still have one remaining PN junction as described in the video. Once the gate current is applied, that barrier is overcome and you essentially have a standard diode. Instead of having a PNPN region you now functionally have a standard PN set up as in a a standard diode. This does not change as the electrons have already been “injected” by the gate so it continues to conduct as a standard PN diode even after removing the gate signal.
