Water cooled rectifier

[Phaneas]

Hello everybody,

I have a water cooled rectifier, build as press pack. The rectifier is used in heavy enviromnet (shocks) and I had some leakage proplems with the ceramic colling plates. Now I want to change the supplier of the cooling plates. Does anybody now a supplier for ceramic cooling plates for Press pack diodes? They have to be ceramic cause of electrical isolation.
Or does anybody know a supplier for water cooled rectifier diodes, which have no press pack form, I would prefer this solution. The diode should be construed for 3000V and 1400A.

Thanks a lot

 

[electricuwe]

Basicly there are three solutions for your problem:

- You can change to unisolated water cooled heatsinks provided the quality of the cooling water is good (controlled conductivity), This approach is often used in Induction heating equipment

- You can use water-cooled heatsinks made from metal and put isolation discs in between (looks like a press-pack diode, but contains just a ceramic disk) unforunately you will have to use a larger diode bcause of the additional Rth

- Consider conversion to modules: I don't know if you talk about peak or average values regarding current and voltage, may be you need paralleling. You will find large diode modules here:

http://www.infineon.com/cgi-bin/ifx...hannel/productCategories.jsp&pageTypeId=17099

 

[ScottyUK]

Suggest you talk to Powerex. They have a lot of experience in very high power electronics.

http://www.pwrx.com

Also the specific link

http://www.pwrx.com/pwrx/docs/assemblies.pdf

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