Hello people,

Message I'm looking for schematic or application note to build a high voltage switch 5kVdc at less than 1Adc.

My goal is to discharge high voltage capacitors into capacitive or resistive load.

I've found the IGBT from Ixys : IXGF30N400 which is the best compliant with my need.


System frequency is very low : < 1Hz, but I'd like to minimize losses during rise or fall time (switch time around 1 to 10 milliseconds, set by gate command stage).

I see I'll have to use at least 2 IGBT in serial mode to withstand this high voltage.

Do you have any recommandation documents to define the correct structure ?

I have no real high voltage knowledge and I'm rather working lower than 500V.

Thanks in advance

JM Vignon​

Etudes Electroniques​

+33 (0)4 92 02 45 45

Possible commercial link removed.
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Have you considered vacuum relays? The link is to one of several sources - http://www.mgs4u.com/RF-Microwave/vacuum-relays-SPDT.htm.

 

Thank you for the link.
I have considered this kind of components (see also http://www.gigavac.com/products/relays/gigavac/index.htm if somebody is interested, they have HV vacuum and reed relays) but like SCR or GTO I can't control conductive phase by driving the command (gate in IGBT) =>
Capacitors won't appreciate a lot instantaneous connexion and discharge.
That's why I plan to control accurately rise and fall edges)

I agree it will be much easier to drive relays. (btw : are bounces effects possible with vacuum relays ?)

I haven't found better than IGBT.

 

If you have the IEEE membership, here's how it's done - http://ieeexplore.ieee.org/Xplore/l...0968198.pdf?arnumber=968198&authDecision=-203.