Very high voltage switching

Discussion in 'General Electronics Chat' started by jm_list, Mar 25, 2009.

  1. jm_list

    Thread Starter New Member

    Mar 25, 2009
    2
    0
    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.

     
    Last edited by a moderator: Mar 25, 2009
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. jm_list

    Thread Starter New Member

    Mar 25, 2009
    2
    0
    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.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
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