220VAC to 600VDC

Transformer + rectifier.

what??? no capacitors to smooth out nasty residual ripple???

Your current requirements (Watt or Amp) is important.

Curent is 50A (about)

Dear Mr.toanphu

You have referred current as 50 Amps. Is this 50 amps is on AC side or DC side, as it makes lot of difference. You have not specified.

If it is on AC, the power is 50 x 220 = 11000 Watts = 11.KW If it is on DC side, the Power is 50 x 600 = 30000 watts = 30 KW Here the P.F is taken as 1. If so the current on AC side will be 30000 = 220 x I hence I = 136.6 Amps, and in my opinion for single phase this is very high load current.

My suggestion is use 3 phase supply and rectifier with filter circuit. OR of single phase cannot be avoided, use a step up Transformer and rectifier to give 600 Volts output.

DHAYANANDHAN.S

600 VDC at 50 amps will take 30+ KW and at least 140 amps from your single phase feed. Do you have that much capacity available?

From there do you need it regulated or not and how close to 600 VDC does it need to stay?

440 VAC rectified and filtered would give you around 620 VDC which could be easily produced using a 2:1 autotransformer plus given that a autotransformer only has one winding acting as both the primary and secondary it only would have to transform half the total power which would get you down to only needing a 15 or so KVA unit for a 30 KVA load.

I have to ask, what do you need 600VDC for????

Doesn't everyone need a 600 VDC 50 amp power supply laying around for 'just in case' type situations?

he must have a hotrod slot car!

Testing 752 or D79 Traction Motors? but would really want 750 VDC

im assuming some type of traction motor(or similar) too 600V is a bit to much charge your cell phone or laptop

You need to use a DC drive that will include the voltage ramp and current limiting needed to drive a DC motor. If you plug your DC source directly to the motor, you will get a very bad result. The motor will jump of the table and the fuses will blow and who ever is making the connection is likely to be burned by an arc flash.

This is very dangerous! Especially that you don't know what you are doing.

Hire somebody who has done this before to produce a safe test-bench. It will be a good investment.

Aside from the fact that you do not provide information execpt when pried from you, it's also a really bad idea for you to include your email address in your post, and the Site Administrators will likely disolve this thread, because having an email address attracts spambots that clog up the server bandwidth.

Stop work and hire someone who knows what to do and how to do it.

Alternatively consider stringing a series of 12V car or traction batteries together.

A little safer but still very dangerous if you don't know what you are doing.

If you rectify the hot side for positive and negative, filter it with the appropriate capacitors, you can get 620Vdc (minus the drop on the two diodes), between the hot sides (positive and negative) of the capacitors. But, in order to supply decently (within 10%) such a heavy load (50A) you need two strong capacitor batteries, which is not practical.

By the way, from the hot wire, the anode of diode #1. Cathode goes to the positive side of the capacitor #1. From the same hot wire, the cathode of diode #2. The anode goes to the negative side of the capacitor #2. Connect the negative side of cap#1 to positive side of cap#2, and, together to the neutral.

Exactly, Mr Indel can give me a circuit to do that...

This sounds very much like a photographic studio flash unit. A very short burst < 100mS. I calculated the OP of my 1250J unit to be 400A @ 630V. The unit used a voltage doubler to charge the capacitors so no transformer needed.

They are down right dangerous!

I wanna sell you two HP high voltage DC power supplies.

I can help you do that.

Other than that, download the schematics for them and "create" something by yourself.