Connect with us

what mosfet to use for an induction heater

Discussion in 'General Electronics Discussion' started by rickselectricalprojects, Sep 24, 2015.

Scroll to continue with content
  1. rickselectricalprojects

    rickselectricalprojects

    118
    12
    Feb 1, 2015
    i forgot to add this:
    i know the higher the RDS the more hot the mosfets will get. i dont care if the K2837 is running a bit hot but i dont want it to fail because of the heat.
     
  2. Old Steve

    Old Steve

    734
    169
    Jul 23, 2015
    Rick, RS Components (Oz) have the STP30NF10 in stock at the moment. Only $1.84 each. They'd get them to you within a couple of days, and have free delivery for online orders:-
    http://au.rs-online.com/web/p/mosfe...D424F5448267573743D53545033304E46313026&sra=p

    Don't settle for the K2837 or the other one. They might cook.

    Edit: RS deliver by courier. Because of this, I always feel bad about placing really small orders with them, and eventually if enough people do it, it could lead to an end of their free delivery, so if you also need other parts, now's the time. :)

    And you'll have to keep us updated on how this project progresses. I'll be interested to see

    It just struck me that, unlike me, you might have a well-stocked local Jaycar. (I have to order online, and RS is faster than Jaycar.) If that's the case, I'd probably buy the IRF540N if I were you. As you say, it's very similar.
     
    Last edited: Sep 24, 2015
  3. Minder

    Minder

    2,948
    623
    Apr 24, 2015
    The alternative is to get creative and come up with a water cooled heatsink, also the caps have to be very low ESR the WIMA MKP4 are a good source, they also carry the tank current so cooling these is a good idea if higher cycle times are needed.
    M.
     
  4. rickselectricalprojects

    rickselectricalprojects

    118
    12
    Feb 1, 2015
    i would like to water cool the fets, cap and the work coil but i dont have a pump. i am thinking at the end of the year when i get a big 8 week holiday when school finishes for the year i have plans on making a big induction heater, i would use this schematic:
    [​IMG]
    (http://4hv.org/e107_plugins/forum/forum_viewtopic.php?129196)
    and i would run it off of a couple of server power supply's in series (36V or 48v);)
    thanks for your help:)
     

    Attached Files:

  5. rickselectricalprojects

    rickselectricalprojects

    118
    12
    Feb 1, 2015
    i went out to jaycar and forked out $12 for two IRF540N mosfets. i am currently prototyping now using the K2837 and some other parts i don't plan on using on my final version and soldering them to scrap PCB board that i had lying around because i don't want to push to much power through a breadboard.
    also is element14 as fast as rs components? do they do courier?
    thanks for your help:)
     
  6. Old Steve

    Old Steve

    734
    169
    Jul 23, 2015
    I couldn't say, Rick. I've never dealt with element14. You might be lucky, but most suppliers only use Australia Post. Mind you, element14 might have an option for courier delivery, but I doubt if it's free.

    Update: I just checked the element14 website:
    (If your order is less than $45, it's $12.95 delivery for up to 20kg.)
     
  7. Minder

    Minder

    2,948
    623
    Apr 24, 2015
  8. Old Steve

    Old Steve

    734
    169
    Jul 23, 2015
    Here's that full-sized image back:-

    Induction Noobheater.JPG
     
  9. rickselectricalprojects

    rickselectricalprojects

    118
    12
    Feb 1, 2015
    the thing with element14 is is your $12.95 away from $45 then you would just get $12.95 worth of spare components.
    jaycars price for components is ridiculous and i might try ordering from both rs and element14 and see which seller has the fastest shipping. i have a feeling that it will be rs components.
     
  10. Old Steve

    Old Steve

    734
    169
    Jul 23, 2015
    My money's on RS too. I placed an order on Monday night, the parts that were in the country were dispatched Tuesday and I got them Wednesday, then got the parts that they said were only in stock in the UK today. Pretty good. :)
     
  11. rickselectricalprojects

    rickselectricalprojects

    118
    12
    Feb 1, 2015
    wow three days, thats great. i will definetly start buying from rs then but i will give element14 a try as well.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-