How Does a Magnetic Coupling Work?

What is Magnetic Coupling

A magnetic coupling is a coupling that transfers torque from one shaft to another, but using a magnetic field rather than a physical mechanical connection.

Magnetic shaft couplings are most often used for liquid pumps and propeller systems, since a static, physical barrier can be placed between the two shafts to separate the fluid from the motor operating in air. Magnetic shaft couplings preclude the use of shaft seals, which eventually wear out and fail from the sliding of two surfaces against each another. Magnetic couplings are also used for ease of maintenance on systems that typically require precision alignment, when physical shaft couplings are used, since they allow a greater off axis error between the motor and driven shaft.


How Does a Magnetic Coupling Work?

Today we are going to give a very basic overview on magnetic coupling.

Starting with the basics, we know we all know about the attraction of magnets. this attraction is possible without the magnets being in contact and if we move on the other will follow. Using this principle if we then mount a series of magnets on a simple shaft arrangement. wetherefore have the basis of a non-contacting coupling.


Working Principle

A magnetic coupling is a coupling that transfers torque from one shaft to another, but using a magnetic field rather than a physical mechanical connection. In another words, The magnetic coupling works by using the power generated by permanent magnets. No external power supply is needed. These are permanent magnets not electro magnets.

The magnets are installed alternating between poles in a side by side and opposing position as seen in the diagram. The main body of each coupling half is of ferromagnetic material to aid the channelling of the magnetic field correctly and therefore maximizing transmittable torque.


Link to full range magnetic couplings for mechanical power transmission.


Magnetic Coupling Applications

Magnetic couplings are highly efficient and effective for numerous above-ground applications including:

  • Robotics
  • Chemical engineering
  • Medical instruments
  • Machine installation
  • Food processing
  • Rotary machines

Magnetic coupling is also ideal for car wash equipment or anything else operating with cleaning chemicals and water present. 


Magnetic Coupling Products You May Need

More Magnetic Coupling Products

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