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How to control voltage in a pulse width modulator?

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Xsports49

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hello,
I have a pulse width modulater that puts out 12volts dc and a square wave pulse. It is adjustable from 100hz to 200khz. it can put out 1 to 30 amps but i will only be needing up to 10.
My question is how can i control the voltage without messing anything up? After the power comes out of my pwm i need to be able to adjust the voltage from 1 to 12 volts before it enters my next circuit.
Thank you for your help
 

Re: Voltage control

Xsports49 said:
My question is how can i control the voltage without messing anything up?
Click to expand...
Messing up what?

Do you have a schematic?
 

Re: Voltage control

I'm not sure if certan ways of adjusting the voltage will change the pulseing from the pwm. i'm sorry i do not have the schematic
 

Re: Voltage control

If you have a PWM you need to filter its output using a LC lowpass circuit to smooth it out and then adjust the pulse width (that´s what pwms are intended for) to achieve the average voltage you need. If the load is purely resistive you need not to filter it. The higher the frequency the smaller L and C become. For maximum voltage flatness you may need to use a more complex filter.
Regards
 

Re: Voltage control

Hi Xsports49,

You may like to tell us more about
your next circuit.
Why you need to adjust the pwm voltage?

Best Regards,
Siong Boon

MODERATOR - SIGNATURE LINKS ARE NOT ALLOWED
 

Re: Voltage control

My curcuit is a follows.
dc power supplie to pwm. Then to Transformer to step up the voltage. The stepped up voltage then goes to a diode and and then a bifiler coil. after the bifiler coil it goes into my capacitor.
I am trying to control the output of my transformer by how many volts i put into it.
If thats even possible, i'm very new to all of this, sorry if i'm not making alot of sense
 

Re: Voltage control

Hi,

Are you building a switching power supply regulator
from a low voltage to high voltage?

Best Regards,
Siong Boon
 

Re: Voltage control

I am building a voltage intensifying curciut. (vic)
I am using it to perform electrolisis. I'm working toard the theory of using high voltage and low current. I have had very good results already i would just like a little more control.
 

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