How do magnetic couplings work

It is suitable for occasions subject to variable load impact and frequent starting and reversing. It is also suitable for applications where 2-axis cannot be strictly aligned. There is no elastic part in the rigid coupling, so there is no ability to absorb vibration. The magnetic drive coupling is a non-contact coupling. It is generally composed of two magnets inside and outside, and the two magnets are separated by a spacer in the middle. The inner magnet is connected with the driven member, and the outer magnet is connected with the power member.

In addition to the function of the elastic coupling buffering vibration absorption, the magnetic drive coupling has the greatest feature that it can completely enclose the inner magnet and the driven member, and in the absence of mechanical contact, the power member is coupled by magnetic coupling.

Movement and power are transmitted to the driven parts. We have two versions, standard and premium, available in different sizes. The only difference between the two versions is that the standard has the magnets exposed to the surrounding environment while the premium has the magnets fully enclosed in stainless steel and ready to function in any environment.

See figure below: Standard left vs premium right versions of the Sintex standard coupling program. Cookies - Our website uses cookies. If you are using our site, you consent to cookies being saved on your computer.

What are cookies? Read more I accept. Search Search. In the end, we only used two D52 magnets on the propeller to reduce the pull force across the gap. We just left the other holes empty. This method is far from perfect, but can be helpful in the initial stages of a design to provide a ballpark estimate.

This way of looking at it can provide a rough starting point for your magnetic coupling experimentation. For the truly adventurous, you can download the 3D model files for the 3D printed parts we used for this boat demonstration.

We created them ourselves for the demo, and they are far from perfect. The boat's not fast, you need a really powerful 80mm fan, and the propeller needed a bit of filing to fit in the back of the boat.

It's a classic case of everything looking pretty on the computer screen, but somehow not quite assemble-able in reality. If you create something nicer, please send us a picture! We are now required to collect sales tax in several states. If your business is tax exempt, learn more here. Login Details. New Account.

Is your business tax exempt? When the torque to be transmitted increases, the angular displacement or load angle between the axes of the magnets of the primary part and the secondary part will also increase. If the torque to be transmitted exceeds a given maximum value decoupling torque , the coupling will break out of sync and the secondary part will come to a standstill. In this case, the drive must be switched off as run-up requires the two parts to be in synchronisation.

This disadvantage can generally be ignored for centrifugal pump sets with a suitable drive rating. It can be avoided altogether by using a secondary part which is designed like the squirrel-cage rotor of an asynchronous motor. This design allows for asynchronous run-up and operation.