Electromagnets suffer from temp coefficients?

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SUMMARY

Electromagnets experience significant temperature effects on their performance, particularly in terms of resistance, induction, and coercivity. The wire used in electromagnets exhibits a temperature coefficient due to changes in resistance, necessitating higher voltage to maintain power. Additionally, the ferrous metal in the electromagnet has a Curie temperature, which for iron is approximately 700°C, beyond which its magnetic properties deteriorate. The magnetic permeability (mu) of the metal also varies with temperature, peaking at mid-range temperatures and declining at extremes.

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  • Understanding of electromagnetism principles
  • Knowledge of temperature coefficients in materials
  • Familiarity with Curie temperature and its implications
  • Basic electrical engineering concepts related to resistance and voltage
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  • Research the effects of temperature on magnetic permeability in ferrous materials
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Electrical engineers, physicists, materials scientists, and anyone involved in the design and optimization of electromagnets and magnetic systems.

Cliff_J
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Ok, so the wire used in an electromagnet will likely have its resistance affected by a temp change on a PTC and thus require a higher voltage to maintain power, simple enough. But will an electromagnet also suffer temp coefficients for induction and coercivity and have a currie temp too?
 
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The ferrous metal of the electromagnet will have a Curie temperature, and the mu of the metal will have a temperature coefficient. Usually the mu is highest at mid-temperature, and lower at the hot and cold extremes. But once you hit the Curie temperature, ker-plop.
 
Thanks. With proper spelling I now see that iron has a Curie point of around 700C which is well beyond what I need.
 

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