Electromagnetic Linear Coupling

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SUMMARY

The discussion focuses on designing a system to move a platform inside a water-filled container using electromagnetic linear coupling. The proposed method involves an electromagnet positioned outside the container, which will couple with the platform through a magnetic field at a gap of 3-6mm. The platform, weighing less than 2lb, requires a secure attachment to prevent drift or slip during slow movement. The feasibility of using permanent magnets versus electromagnets is also explored, with concerns about the reach of lifting-type electromagnets highlighted.

PREREQUISITES
  • Understanding of electromagnetic principles
  • Familiarity with linear motion systems
  • Knowledge of magnet types and their applications
  • Basic principles of fluid dynamics in a container environment
NEXT STEPS
  • Research the design and specifications of lifting-type electromagnets
  • Explore the use of permanent magnets in linear motion applications
  • Investigate the effects of water on magnetic field strength and coupling
  • Learn about linear guide systems suitable for electromagnetic applications
USEFUL FOR

Engineers, product designers, and hobbyists interested in electromagnetic systems, linear motion technology, and applications involving fluid environments.

Phife
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Hello,

I am trying to design a way to move a platform that is inside a container without any direct connection to the platform.

I hope to have a linear guide outside of the container with an electromagnet attached. When the electromagnet is energized it will couple with the platform inside the container with its magnetic field and as the electromagnet moves up and down the platform inside moves as well.

The gap between the electromagnet and platform will be between 3-6mm. The platform will weigh less than 2lb. The container will be filled with water.

I need the platform to be well attached to the magnet, there can be no drift or slip. The platform will move very slowly.

Is this possible? Would a set of permanent magnets work better? I've read that the lifting type electromagnets don't have much reach. What sort of design would work best?

Thanks for any help you guys can give me, I know very little about magnets.
 
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