Cogging torque

nchode

What is cogging torque in permanent magnet motors?

rtk

Hi,

Cogging is the oscillatory torque caused by the tendency of the rotor to line up with the stator in a direction where the reluctance of the magnetic circuit "seen" by the magnets is minimum.

nchode

How is Cogging torque measured?

cblair

Hi -There are many ways to measure cogging. The simple method is by using torque transducer. Cogging torque exists even when there is no stator current and is always measured in zero stator current condition.

rtk

You can predict the Cogging torque during design using Ansys RMxprt and Maxwell tools.