What is the mechanism so that electromagnet core becomes heated?
Is that means that cable trays shall be of non-magnetic materials ( e.g. Stainless Steel, etc )
2007-08-09 18:38:14 · 4 answers · asked by amrobyono 3 in Science & Mathematics ➔ Engineering
Simply put:
The magnetic field tends to align the crystals 'working` the core. This heats it, and consumes energy.
The same happens in conduit and cable trays.
Overall impedence and thus energy loss is lower with nonmagnetic materials in close association with A.C. wiring.
2007-08-09 19:48:35 · answer #1 · answered by Irv S 7 · 1⤊ 0⤋
As AC fields pass through a core, eddy currents are created in the material, which creates heat. Transformer cores are made up of many plates with thin insulation between them to help reduce the eddy currents.
2007-08-16 16:36:59 · answer #2 · answered by trader 4 · 0⤊ 0⤋
If you are located in the U.S.A., ( SAE grading codes applied) a grade of steel known as 1018 steel is okay to use for your magnet core. It is probably the least expensive and most common grade available. It isn't the BEST possible choice, but unless you need to invest in something special, I think you will find its performance acceptable. For best efficiency, your magnet core must be made of a grade of iron that magnetizes easily, but won't HOLD a magnetic field after the power is removed. Fortunately, the iron/steel stock that is most readily available from many hardware stores is 1018 steel. Choose your diameter of rod and try it.
2016-05-18 05:50:44 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Another source of heat comes from eddy current. With AC power, the core acts a little bit like a transformer winding. That power is converted into heat.
2007-08-11 20:57:48 · answer #4 · answered by ancient_nerd 2 · 1⤊ 0⤋