How Does Frequency Affect the Strength of an Electromagnet?

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Discussion Overview

The discussion centers on the relationship between frequency and the strength of electromagnets, specifically exploring whether a frequency can be associated with a given magnetic field strength, such as 45000 gauss. The scope includes theoretical considerations and technical explanations related to electromagnet operation.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks a relationship between frequency and the strength of an electromagnet with a specified magnetic field strength.
  • Another participant asserts that there is no such relation between frequency and the strength of an electromagnet.
  • A different participant notes that electromagnets typically use DC current and expresses uncertainty about the use of AC currents without conversion to DC.
  • A participant provides a mathematical expression for the magnetic field and mentions that the frequency of the current is equal to the frequency of the source.
  • Several values for permeability of different materials are listed, suggesting material properties may influence the magnetic field strength.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between frequency and electromagnet strength, indicating that multiple competing perspectives remain without consensus.

Contextual Notes

There are unresolved assumptions regarding the nature of the current used in electromagnets and the implications of using AC versus DC. The mathematical relationship provided may depend on specific conditions not fully detailed in the discussion.

ymhtr
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I am looking for a relation between electromagnet (or permanent magnet) and frequency.For example what is the frequency of an electromagnet that has 45000 gauss electromagnetic field?
Thanks.
 
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There is no such relation.
 
You use a DC current to power an electromagnet. I am not aware of an electromagnet that uses AC currents without converting them first to DC.
 
ymhtr said:
has 45000 gauss electromagnetic field?
Thanks.
It is 45000 gauss magnetic field

I=I0[sin(wt+k)]
B=μnI/2πr {n=no.of loops, r=radius of a loop}

To the right are the values of μ
Ferrite U 60 => 1.00E-05
Ferrite M33 => 9.42E-04
Nickel (99% pure)=> 7.54E-04
Ferrite N41 => 3.77E-03
Iron (99.8% pure)=> 6.28E-03
Ferrite T38 => 1.26E-02
Silicon GO steel => 5.03E-02
supermalloy => 1.26

The frequency of current and magnetic field is equal to the frequency of source
 
Last edited:

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