pulsing 40 kvdc

Discussion in 'General Electronics Chat' started by TAKYMOUNIR, Aug 1, 2012.

  1. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
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    i need help i need to do pulsing power supply vo=40kvd and io=10 ma and the pulsing rate for about 1 khz so is there any mofset or igbt can i use it to do pulsing
     
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    What is this circuit for? Do you need a constant current of 10mA during 500us (1kHz @50%) ???

    You will have some difficulties finding a component for this voltage.

    Do you already have a power supply that can output this voltage?
     
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  3. #12

    Expert

    Nov 30, 2010
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    I believe there is no such thing as a 40KV semiconductor. My guess would be a very expensive vacuum tube because mechanical switches can't go that fast.
     
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  4. SgtWookie

    Expert

    Jul 17, 2007
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    40kv @ 10mA is 400 Watts. Are you sure about that requirement?

    You will likely need to use a transformer, like an automotive ignition coil, to create such pulses at that high of a voltage. There are plenty of relatively low-voltage switches/transistors/MOSFETs/IGBT's that are suitable for the primary side of the coil.

    Here are some OnSemi part numbers for their ignition IBGTs:
    NGD15N41A: Ignition IGBT, 15 A, 410 V
    MGP15N40CL: N-channel Ignition IGBT, 15 A, 410 V
    NGD18N40A: Ignition IGBT, N-Channel, 18 A, 400 V
    NGB8204N: N-Channel Ignition IGBT 18 A, 400 V
    NGB8202N: N-Channel Ignition IGBT 20 A, 400 V
    NGB8207AN: N-Channel Ignition IGBT 20 A, 365 V
     
    Last edited: Aug 1, 2012
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  5. #12

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    Are you in sneaky mode, wookie?
     
  6. SgtWookie

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    Jul 17, 2007
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    Always. Otherwise, I get an unmanageable number of PM's and E-mails. :rolleyes:
     
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  7. #12

    Expert

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    Awww. You're just too lovable!
     
  8. BillB3857

    Senior Member

    Feb 28, 2009
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    What is the duty cycle. That answer makes all the difference in the world between peak power and average power.
     
  9. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
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    i need to do test for power supply so i need to do this kind of test
     
  10. strantor

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    Oct 3, 2010
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  11. strantor

    AAC Fanatic!

    Oct 3, 2010
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    see post 10.
    80KV MOSFET.
    same company makes 120KV semiconductors as well.
     
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  12. #12

    Expert

    Nov 30, 2010
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    Well there you go! PPM Power in UK. Just strip everything after "UK" off the link and you have the corporation.
     
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