20 Khz 800 volts power supply for ultrasonic welder - diyAudio
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Old 6th August 2012, 04:21 AM   #1
mehrdad is offline mehrdad  Iran
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Default 20 Khz 800 volts power supply for ultrasonic welder

Hello every one.
i have a sonimat gm 2010 power supply that is supplying an ultrasonic welder that welds nonwoven materials.
i want to build a circuit to replace this power supply.
the output is 20khz in 800 to 1000 volts ac.
can anyone give me a circuit?
thanks.
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Old 6th August 2012, 05:03 AM   #2
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Look for sine wave inverter schematics. I am not sure if the ultrasonic welder uses sine wave but is most probable.

Having the diagram of the inverter, just modify the output voltage by changing the number of turns.

Also be aware that the power required from this supply is also to be considered.

Gajanan Phadte
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Old 6th August 2012, 05:12 AM   #3
mehrdad is offline mehrdad  Iran
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i have probleme with Saturation of ferrit outout transformer.
because of that the power switches blow up.
can you give me calculations for EE ferrits and number of turns?
for 600w power.
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Old 6th August 2012, 05:30 AM   #4
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I'm way out of my depth here, but the transformer probably needs a gap to avoid saturation.
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Old 6th August 2012, 05:50 AM   #5
mehrdad is offline mehrdad  Iran
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yes you`r right.
but if i have currect calculations it will be better.
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Old 6th August 2012, 05:57 AM   #6
jcx is offline jcx  United States
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things could be a bit complicated - the piezo ceraimc stack can want to see a series L to cancel some of the stack's C - but the maker sugests some controllers are "smart" - so you may need broader band drive to the stack to allow the controller's tuning of the drive for the mechanical parts resonance properties

I would want to see the exitsing unit schematic before recommending a replacement
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Old 6th August 2012, 06:15 AM   #7
mehrdad is offline mehrdad  Iran
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here is the welder schematic
Click the image to open in full size.
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Old 6th August 2012, 06:20 AM   #8
mehrdad is offline mehrdad  Iran
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Click the image to open in full size.
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Old 6th August 2012, 06:21 AM   #9
mehrdad is offline mehrdad  Iran
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Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

Last edited by mehrdad; 6th August 2012 at 06:47 AM.
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Old 6th August 2012, 06:46 AM   #10
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So do you plan to use this in a piece of hifi gear????!!!!!
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