As you don't know the purity of the iron, I don't think you can calculate the permeability. Therefore, if you are not going to buy another core with known properties, you should measure the properties of the existing one, for example, by using the core in the electromagnet:-) If the properties of the test electromagnet are not satisfactory, you can redesign the coil based on the test results.

2022年1月19日 · Your value of the permeability is not realistic. The real magnetic permeability of iron is complicated and depends on the geometry, the crystal structure, the purity, and the history of a particular sample. A typical value of the relative permeability for good everyday iron would be $\mu_{r}\sim 1000$.

This amplification factor is given by the relative permeability $\mu_r$; for example, iron typically has an amplification factor of 4000, meaning that it amplifies an externally-applied $\mathbf{H}$-field by a factor of 4000 relative to vacuum. Unfortunately, this amplification stops past a certain point, typically on the order of several Tesla.

Iron powder and ferrite cores (using oxides, rather than the pure metals) can be made to perform well up into the GHz range. If you are interested in magnetization curves, you have to ask the manufacturer of the core for a materials spec sheet with measured (and hopefully guaranteed) magnetization data (that depends both on the material AND the ...

On the contrary, steel is used as a weak, albeit permanent magnet since it has large retentivity and low permeability. I want to know whether- by means of optimization- soft iron can be made to retain the MEEC for a prolonged period of time and/or steel composition can be modified in order to able it to align its domains with greater ease and ...

2021年4月15日 · The recoil permeability is near 1, or assumed to be 1 for many common materials such as NdFeB, SmCo and ferrites. However, some materials have a significant demagnetization, such as Alnico, with deviating recoil curves and higher recoil permeability. In those cases, it is more complicated to conduct a linear approximation.

2024年8月20日 · However, my confusion is, when ferromagnetic materials, such as soft iron, which also have a very high permeability, are placed in a magnetic field it induces a magnetic field oppose to the first magnetic field which it was placed on (from what I understand, that's how materials like iron, which doesn't show magnetic properties when they are ...

2022年4月7日 · As we increase the current through the coil and the magnetic field increases in strength, wouldn't the permeability of the iron also increase? But this would only happen until the iron core saturates and its permeability reaches a maximum. Is there any way to calculate beforehand at what current the permeability would reach its maximum?

The magnetorquers are iron-nickel core solenoids, single-wound. Given the core permeability, number of turns, and current, how do I calculate the magnetic moment? From Wikipedia, I know that for an air-core solenoid the magnetic moment is just: $$ \boldsymbol{\mu}=N I \mathbf{S} $$

2017年3月10日 · The ferromagnetic materials are mostly metals- like Iron itself, from where the name is derived. These materials have unpaired electrons and free ions, and thus, they have a net magnetic moment which is intrinsic to themselves. These materials can support a large amount of magnetic flux intrinsically for a given magnetizing force.