How to make a DC square waveform in high voltage

Hi I am new here. But I have a qsn.

How to produce a DC square waveform in high voltage? Source can from DC power supply ( 0 ~ 30V, one direction ) and SSO ( 230V AC ). The high voltage is about 10kV.

Thanks. Guys.

0 JohnDSiviter over 15 years ago

Hi Yi Yin,

At what frequency are you wanting the square waves to be?.

It sounds like you need a Oscillator connected to an Opto-isolator and an IGBT Output, however 10kV is still pretty high even for an IGBT!.

What is your application?

Thanks
John.
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0 Former Member over 15 years ago in reply to JohnDSiviter

Hi

Yar~ the frequency can be quite high, from 50Hz to 20kHz.
This is used for high-voltage deinfection of liquid, we are doing research and testing, the power for DC square waveform is much lower than AC waveform.

Thank you.
John
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0 enrico.migchels over 14 years ago

Hi michelleyy,

What you need is a solid state switch from Behlke (www.behlke.de). Those guys have all the goodies you need. I recently bought a high voltage switch from Behlke. I had to pay 1000 euro but it almost impossible to build a relaible switch for 10kV. You can use several IGBT's is series but you need to drive them also. It is difficult.....
You can also try to find some electron tubes. I have some triodes (50kV) and Thyratrons (16kV). Those can also do the job but they are big and fragile. Be aware of X-Ray. :-)

Best regards, Enrico Migchels
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0 Former Member over 14 years ago in reply to enrico.migchels

Hi Enrico Migchels

Thanks for your reply.
I found what I need is so difficult to build, I also tried some diodes and capacitors, but I think they will not work. Anyway, ask a company to customize for me may be the good. Thanks. HaHa~
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