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heating elements

Discussion in 'Electronic Basics' started by Michael Robinson, Jan 17, 2011.

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  1. I've been wondering how the heat controls on high power heating element in
    electric stoves, baseboard heaters and the like work. Is it PWM?
  2. Jamie

    Jamie Guest

    Nope, that would cost too much.

    Just on/off cycles. cycles that are in seconds of each time.

    Some of them are so cheap, they just use bimetal temperature

  3. Rich Grise

    Rich Grise Guest

    In a way - they're usually controlled by a thermostat, which turns off the
    power at one temp, and back on again at another, lower temp.

    Sort of like PWM whose pulse width is measured in hours.

    Hope This Helps!
  4. Phil Allison

    Phil Allison Guest

    "Rich Grise is Wrong Again "
    ** Only true of electric ovens.

    For coils and hot plates, power control is by an adjustable thermal switch
    that cycles on and off at a rate determined by its own self heating and the
    setting on the dial.

    ** Bollocks.

    ...... Phil
  5. Jasen Betts

    Jasen Betts Guest

    yes, at a very low frequency. typically 1Hz or less.
  6. Phil Allison:
    Why? Isn't what you just described?
  7. Rich Grise

    Rich Grise Guest

    Yeah, but that's Phil.

    Admittedly, I could have said "minutes" instead of "hours," but that
    all depends on the application.

  8. Phil Allison

    Phil Allison Guest

    "F. Bertolazzi"

    ** The "hours" bit is totally absurd.

    As even a fuckwit like you should have picked.

    ..... Phil
  9. Phil Allison

    Phil Allison Guest

    "Rich Grise"

    ** Err - try " seconds " !!

    You lying fuckwit.

    ** Which we know and you are again lying about.

    ..... Phil
  10. Phil Allison:
    Hey, wait a minute...
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