Ultrahigh voltage circuit

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tranhan

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uc3845 with buck circuit

Hello.
I need to build ultrahigh votage circuit
input range 220V, 50Hz
output 0-80,100,120kV
price cost below 200 usd

Can anyone give me some application notes
Or maybe some useful links?

Thank you for reply.
 

Please specify:
1. Max output current
2. AC or DC output
3. Size and weight constrains
4. Is the circuit custom-made or series production
 

I have some parameters
1. Input AC 220V, 50Hz -> transformer -> DC 12V, 5-10A
2. DC output 0-80, 100, 120 kV
3. Series production
 

Can't you generate 80kV, 100kV and 120kV directly from 220Vac ??
Why would you go down to 12Vdc and then step it up to kV ??
Regards,
IanP
 

OK.
First method is to take a TV flyback and use it in standard configuration. UC3845 can be used for control and MOSFET drive. This will provide you up to 25 kV DC. Higher voltages can be obtained by series connection of the 25kV modules. Additionaly each module will require isolated supply. It can be made of transformer with well insulated secondary windings.

2 method: IR2153+2MOSFET unregulated inverter powered from somth. like 400V DC -> 15 kV step up transformer -> 120 kV multiplier. Step up transformer is a special or TV flycack transformer (old type, without a rectifier inside).
Output regulation can be made with UC3845 based BUCK converter feeding the IR2153 inverter stage.
 

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