Over winding an iron core

Discussion in 'General Electronics Chat' started by #12, Nov 4, 2011.

  1. #12

    Thread Starter Expert

    Nov 30, 2010
    Real situation, I bought some High Pressure Sodium fixtures that were labeled "35 watts" but the inductor was for a 50 watt bulb. Not knowing any better at the time, I added something like 12 turns (or was it 20 turns?) to the inductor. Will this put more or less stress on the iron? By stress, I mean overheating caused by too much magnetism, and you must consider that the goal of reducing current was accomplished.

    If you need numbers, I can probably look this up in an old notebook, but I think the math can be done without specifics.
  2. crutschow


    Mar 14, 2008
    It will not stress the iron. If the inductor does not become excessively hot (too hot to touch) after the light has been on for a couple hours then there is no problem.
    #12 likes this.