## Torque Calculation for Magnetic Coupling

## Torque Calculation for Magnetic Coupling

(OP)

Has anyone found any torque calculations for magnetic coupling; i.e. what magnetic strength is required to support the torque from the motor shaft? I have done a bunch of online research and it seems the only way to calculate this number is by running simulations; which is hard to believe because there are a lot of companies that manufacturer mag drive pumps and I can't believe that they run simulations every time they design a new pump. There has to be some sort of standard or rough calculation. thread340-374735: Torque Calculation for Magnetic Coupling

## RE: Torque Calculation for Magnetic Coupling

Sometimes an existing design can be lengthened/shortened to a desired torque since it'll scale linearly.

There are a number of analytical expressions published in IEEE Transactions on Magnetics by Furlani. With a moderate amount of programming ability, one can write a program that'll take the relevant parameters and calculate the torque directly.

Do you have a particular application or specific set of dimensions in mind? You'll find a number of people in this forum are happy to run a feasibility analysis in their software.

## RE: Torque Calculation for Magnetic Coupling

https://hal.archives-ouvertes.fr/hal-00673920/docu...

"Simple Analytical Expressions for the Force and Torque of Axial Magnetic Couplings" by Thierry Lubin, Mezani Smail, Abderrezak Rezzoug

It didn't look simple from a quick skim, but I guess it's all relative

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(2B)+(2B)' ?

## RE: Torque Calculation for Magnetic Coupling

E. P. Furlani, R. Wang, H. Kusnadi, “A Three-Dimensional Model for Computing the Torque of Radial Couplings”, IEEE Transactions on Magnetics 31, 2522-2526 (1995)

## RE: Torque Calculation for Magnetic Coupling

## RE: Torque Calculation for Magnetic Coupling