I need to create a variable output power supply that will give both AC and DC voltages up to 10Amp, to be used like a bench power supply for testing.
I have an idea of what i need but would like some help with the DC output.
What I have is:
240v 50Hz AC supply to the Variac through an isolation transformer.
The variac operates from 0 to 240v
Full-Wave bridge rectifier ( up to 400v) to convert to DC voltage.
I then need to smooth the output of the rectifier with capacitors, how would I calculate what capacitor I would require considering a possible maximum of 10Amp load and 240v AC input, but usually any load would be less than that, so 240v x 1.41 = 273vDC so to be safe a potential maximum of 300v DC.
Then after the capacitors a bleed resistor to discharge the capacitors as a safety precaution.
Can anyone suggest what capacitors and bleed resistor I require or if this design would work?
I have an idea of what i need but would like some help with the DC output.
What I have is:
240v 50Hz AC supply to the Variac through an isolation transformer.
The variac operates from 0 to 240v
Full-Wave bridge rectifier ( up to 400v) to convert to DC voltage.
I then need to smooth the output of the rectifier with capacitors, how would I calculate what capacitor I would require considering a possible maximum of 10Amp load and 240v AC input, but usually any load would be less than that, so 240v x 1.41 = 273vDC so to be safe a potential maximum of 300v DC.
Then after the capacitors a bleed resistor to discharge the capacitors as a safety precaution.
Can anyone suggest what capacitors and bleed resistor I require or if this design would work?