Dear Team,

I need to convert 200V DC to 500V DC(1A).

I know we can use flyback ,but I need a transformer less solution.

May I know your thoughts.

I searched for boost converter IC's.

Did not find anything for the same.

Regards

 

Why is a transformer not permitted?

There will be no solution for continuous DC, one way or another you will have to convert the DC to AC and back in order to boost the voltage. This will involve at least an inductor, and probably a transformer.

You are dealing with non-trivial power, 500W is a lot, and 500V is dangerous.

 

Inverter plus cockroft walton multiplier, but 1A might be too much for that.

 

I know we can use flyback ,but I need a transformer less solution.

Can you have an inductor? A inductor is almost the same as a transformer.

 

Can you have an inductor? A inductor is almost the same as a transformer.

inductor is allowed.not much bulky

 

You're going to have to convert the DC to AC and then boost it up , so what do you need the voltage for, ?

 

inductor is allowed.not much bulky

Neither is a transformer at high frequencies.

The trouble with an inductor based boost circuit is that, for a 5 to one boost, all the energy must be transferred in 16.5% of the time, so the inductor current would need to be more than 7A.

You should look into my multiplier idea. These were used for high power circuits originally, I now recall.

 

500V @ 1A = 500 watts.
200V @ 2.5A = 500 W
Here is an example of a boost PWM using a center tapped inductor to get 2:1 more boost. In this case I am boosting 12V to 30V which is about the same thing. The point is that a tapped inductor is a transformer. (L1 and L2 are one part)

 

Yes, there is a simple solution. Two and a Half 200 VDC supply in series.

 

The transformerless circuit that uses no inductors is a charge pump.Charge the capacitors in parallel then discharge them in series. It sounds complex and it is. And for one amp it will be bulky.Using an inverter operating at 120kHz will be a rather smaller transformer, not a heavy iron core type. But bulky heat sinks will be needed because even at 90% efficient that will be 50 watts of heat to remove.
And what sort of application requires 200 VDC to be stepped up to 500VDC???