Capacitor temperature test

Discussion in 'The Projects Forum' started by JehanKhan, Jul 21, 2015.

  1. JehanKhan

    Thread Starter New Member

    Oct 24, 2011
    9
    0
    Hello All and Good morning
    I am trying to test the Electrolytic Capacitor temperature rise and then measure it with a IR camera. what i did is used to MOSFET with 50% duty cycle and connected to the inductor with the capacitor as a filtering capacitor and a load resistance to draw some amps of current. The peak triangular current i got about 3amps. For small capacitors it works better but i did not succeeded with a 330uf capacitor.
    And i am thinking to do it with only MOSFET so that i can put as much stress as i can to generate a pulsating current in order to make the capacitor warm. I need advise about this idea. If i should do it? and if i can get some suggestions that would be great.

    Thanks in advance
     
  2. DickCappels

    Moderator

    Aug 21, 2008
    2,647
    632
    If you only use a MOSFET, what will keep the capacitor from charging up to a peak voltage and staying at that voltage? If the voltage across the capacitor doesn't change, there won't be any current to heat it up.
     
  3. JehanKhan

    Thread Starter New Member

    Oct 24, 2011
    9
    0
    Yes you are right i put a resistor in parallel to it to discharge the capacitor. and it worked :)
    thanks for the response anyway. cheers
     
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