I am in need of a little help with a circuit to supply power to a 230vdc motor from a mini lathe (just to head of suggestions of using the origional controller its not a option as it blew through many tracks on the pcb due to a stray bit of swarf).
I am no great shakes at electronics but can follow a diagram pretty well and decided to give the circuit pictured below a try.
I have modified it slightly to suit parts I have rather than whats called for (this is mostly just slight changes in resisters and capacitors eg:22k where the 20k is needed) and even though I didnt get time to scope it tonight I think it is working well and the multimeter tells me its giving me 280vdc.
I can see 2 options now:
A) leave this circuit as is and regulate the 280vdc down to the required 230vdc
B) change the components of the circuit to get the required voltage which is what I would prefer to do but am not sure how best to achieve this, I am guessing I would need to replace D7 to give me a different reference voltage?
Any suggestions would be greatly appreciated.