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Good topology for a capacitor charging power supply
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ZeroResistance:
What's an efficient topology for charging capacitors.
The charging voltage would be from 100 to 400V DC.
Input voltage 12 to 15V DC.
I have seen topologies that use hard inductor switching. but I'm leaning more towards Soft switching, ZVS / ZCS or resonant mode.
I've read a few threads on EEVblog regarding these and especially https://www.eevblog.com/forum/beginners/what_s-inside-a-low-power-isolated-dc-dc-converter-brick/
Where T3sl4co1l mentions there are of 3 kinds: Free running, Flyback and resonant.
tautech:
For what requirement ?
Cap leakage tester ?
ZeroResistance:

--- Quote from: tautech on April 07, 2019, 07:19:52 am ---For what requirement ?
Cap leakage tester ?

--- End quote ---

Not really, this is a general purpose power supply would charge the capacitors to a set voltage say between 100 to 400V, the charged capacitors can then be used for various pulse discharge circuits.
Basically the aim of building this power supply is to efficiently charge a capacitor with a constant current output.
tautech:

--- Quote from: ZeroResistance on April 07, 2019, 07:24:23 am ---
--- Quote from: tautech on April 07, 2019, 07:19:52 am ---For what requirement ?
Cap leakage tester ?

--- End quote ---

Not really, this is a general purpose power supply would charge the capacitors to a set voltage say between 100 to 400V, the charged capacitors can then be used for various pulse discharge circuits.
Basically the aim of building this power supply is to efficiently charge a capacitor with a constant current output.

--- End quote ---
Put the word Pulse in there and immediately you're into Pulse Grade cap territory. The discharge curve will determine what cap type is required.

Pulse frequency ?
ZeroResistance:

--- Quote from: tautech on April 07, 2019, 07:39:07 am ---
--- Quote from: ZeroResistance on April 07, 2019, 07:24:23 am ---
--- Quote from: tautech on April 07, 2019, 07:19:52 am ---For what requirement ?
Cap leakage tester ?

--- End quote ---

Not really, this is a general purpose power supply would charge the capacitors to a set voltage say between 100 to 400V, the charged capacitors can then be used for various pulse discharge circuits.
Basically the aim of building this power supply is to efficiently charge a capacitor with a constant current output.

--- End quote ---
Put the word Pulse in there and immediately you're into Pulse Grade cap territory. The discharge curve will determine what cap type is required.

Pulse frequency ?

--- End quote ---

Apologies I wasn't clear, the intention of this question was to build a constant current capacitor charger that can charge capacitors to various voltage levels like 100V to 400VDC.
Basically I needed a efficient capacitor charger, i used to charge my capacitor with a voltage source and a current limiting resistor.
The charged  capacitors can the be sued for various other circuits / experiments. The capacitors would by polypropylene film/foil type .
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