Hi Briez
You can easily design a morgan chopper . all you need is a current driver like a transistor and then a pulse transformer and then an SCR which depends on your power rating . and another thing that you need is reading this article ! https://sudhinpk.files.wordpress.com/2011/10/morgan-chopper.pdf
Best Wishes
Goldsmith
Hi Briez
You can easily design a morgan chopper . all you need is a current driver like a transistor and then a pulse transformer and then an SCR which depends on your power rating .
Hi Briez
How many pulses ? what do you mean by how many pulses ? i hope you know how an SCR works . when you trig it , it will be turned on while you attempt to turn it off . one trig pulse might be enough . it depends on what kind of load you have and situation of your load . some times when the load is very inductive the best method is using a pulse train .
Hi Briez
May i ask a question please ? why morgan chopper ? just for learning ? because you can use a PWM based DC motor velocity control which would be more simpler and with better specifications .
Anywhere , for answering your question :
BT151 would be good as your thyristor , and for diodes it depends on your load . but you can try 1n5408 or perhaps 1n4007 or UF4007 .
Best Wishes + Good Luck
Goldsmith
i want to control DC motor, but first i want to know how SCR fires and how it works. So practically i want to implement DC motor of 24V. And then i will go on higher voltage.
As you said SCR and Diode, i am downloading its datasheets and as per its rating try to make morgan chopper circuit.
Hi Briez
I understand you are learning about SCR and how it can be fired . but there are also many better ideas to use an SCR for speed control of a DC motor . why you didn't try them ? for instance something like this :
It is very trustful ! because you can control if as well as you want and also when you trig X2 , then X1 will be turned off . i.e: R1 is your DC motor !
BTW : x2 is a low power SCR but X1 is your main SCR .
However if you like to use the morgan chopper , i wish success to you too :wink:
Good luck with SCR !
Goldsmith