Electromagnets and Permenant Magnets Combined

  • Context: Undergrad 
  • Thread starter Thread starter Woodski
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SUMMARY

The discussion centers on the interaction between electromagnets and permanent magnets, specifically when a permanent magnet is attached to an unpowered electromagnet. It is established that powering the electromagnet will cause it to behave normally, repelling the permanent magnet as expected, despite the presence of the permanent magnet. The participant shares insights from personal experiments with tattoo machines, noting that materials like brass and aluminum are preferable for machine frames to avoid unwanted magnetism that can affect performance. The discussion also touches on the effects of back EMF and magnetic field density during operation.

PREREQUISITES
  • Understanding of electromagnetism principles
  • Familiarity with solenoids and their operation
  • Knowledge of magnetic field interactions
  • Experience with materials science, particularly ferrous vs. non-ferrous materials
NEXT STEPS
  • Research the effects of back EMF in solenoids
  • Explore the principles of magnetic field density and its implications
  • Investigate the properties of non-ferrous materials in electromagnetic applications
  • Conduct experiments on the interaction between powered electromagnets and permanent magnets
USEFUL FOR

Electromagnetic engineers, hobbyists experimenting with electromagnets, and professionals in fields involving magnetic applications, such as tattoo machine design and maintenance.

Woodski
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Hi,
Would an electromagnts or solenoid behave any different if a permenant magnet was attached to it when it is powered up? For example, if I had a opposing pole type electromagnet and I attached the north pole end of a permenant magnet to the north pole end of the unpowered electromagnet. Now if I power up the electromagnet would it behave in the normal manner and repel the permenant magnet with the magnetic strength with the same electrical current?
 
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I can only comment on this from a non professional standpoint. I am just an average dude, but from my experiments and knowledge of tattoo machines, I would have to say not. I have found that brass and aluminum are best suited for machine frame bases because the iron and steel ones develop magnetism during use and this condition deteriorates the performance of the machine. The electromagnets that power the machine cause the iron to become a permanent magnet and it throws all the settings out. With non ferrous material, this does not happen and the set up you start with remains unchanged until the machine needs maintenance or repair.
I have not figured out exactly what happens as far as voltage is concerned, but I can break out the old irons and run some tests if you think it would help.
 
I am mentally building this like this-

Consider the solenoid fitted within the poles of a horse-shoe magnet.Now,If you turn on the current,possibly there will be a repulsion...consider the following---
1.due to interaction between high density of magnetic field
2.back emf induced in the solenoid in the transient state.
 

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