Hello everyone

I have a source 650V 1.2A 50Hz. Half bridge. I want to make it full DC straight line with capacitors filter. Any idea how to make it?

Thank you

 

Add a capacitor across the output of the rectifier.

 

But what kind of capacitor? I need the parameters please

 

Ensure the correct PIV for the rectifier and capacitor value is correct if the actual DC is 650V.
Max.

 

This all sounds horribly dangerous if you're messing with 650V and are having to ask these questions. Is your source 650V AC (rms) or DC? Is it isolated?

 

You have NOT specified enough information to guesstimate all of the specifications for a filter capacitor. For instance...
1. What is the load current?
2. What is an acceptable amount of ripple?
3. Is the source voltage given in RMS or peak?

I will tell you it will be near impossible to have "full DC straight line" (whatever that is - I can only guess what you really mean) if you have any load.

 

Hello everyone

I have a source 650V 1.2A 50Hz. Half bridge. I want to make it full DC straight line with capacitors filter. Any idea how to make it?

Thank you

Without any load just about any capacitor will make a "straight line" voltage, with just a bit of variation due to the leakage of the cap itself, and some more due to the measurement device itself.

If you draw any current at all you need to jump to an infinite cap to see the same stellar straight line.

Sorry, that's the physics mate. To make a straight line with load you need post regulation, some circuit that will regulate to some lower voltage then the maximum or even minimum voltage of the cap.

 

I ve a strange thing here when the system. When i put the load the voltage get 0 Volts.

 

When i put the load the voltage get 0 Volts.

That sounds much safer

 

I don't see how this thread is not about a "transformer-less power supply". Maybe it would get closed faster if he said he was doing it in his car.

 

I used to get zero volts, too, when I'd put a 10 ohm resistor on a 5 volt transformer meant to output something like 50mA

Seems there is much more to learn, OLS! Take it one step at a time, and not at high voltages, please....