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How to increase voltage of PWM signal

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Xsports49

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How to increase voltage

Hello, i have a pwm that can be adjust from 100hz to 250khz. I get a square wave pulse out. It puts out 12volts dc from 0 to 30 amps. My question is what can i use to increase the voltage from 12v dc to 36v and even to 200v; and where can i buy something like this? Would it be possible to use a car coil for the spark plug to increase the voltage? I am relativly inexperianced and i could use any help i can get. Thank you!
 

Xsports49

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Re: How to increase voltage

yes that would be great if i could adjust the voltage. But it could be just one set vlotage. In a correction to my last post i'm look to make upward of 1000 volts from my 12 volt sorce.
 

love_analog

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Is this a buck or a boost? I think you are looking for a buck -boost since you are varying Vin from 12v to 200v for a fixed Vout. Don't know waht Vout is though?
 

dick_freebird

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Your PWM driver would have to be capable of delivering
the scaled current, and tolerating the kickback of the coil,
but you could probably get more than enough out of a car coil
to hurt something.

If you want ignition-level voltage then your switch needs to
go open, not simply to another potential. The flyback
voltage is higher that way. But they're viable autotransformers.
I do not know the turns ratio. But I've been knocked on my a$$
playing around with them.
 

srizbf

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you require a 'smps' transformer type for the required voltage.

i assume that you have 12v , variable frequency , 30a max current.

since the frequency is also varying , smps type trfr , ferrite cored one , is the requirement.

ignition coil suitability dependnds on its core type
and its frequency characteristics.

srizbf
3rdmay2010
 

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