What does a back iron do and when is it needed?

The back-iron is usually a carbon-steel cylinder around the magnets that forms the return path of flux between adjacent magnets within the rotor. It increases the magnetic flux and therefore the motor torque. Back irons are always needed. While all of our motors can be ordered with back iron, customers can choose to design and integrate their own back iron using ferrous material.

For more information on our motors products, click here.