Cogging torque
A periodic torque fluctuation in permanent-magnet motors caused by the interaction between stator slots and rotor magnetic poles, which produces position ripple during low-speed motion; a common compensation method is to measure it in advance and build a lookup table for feedforward compensation.
Timeline (last 90 days)
Cogging torque is the periodic torque ripple produced in a permanent-magnet motor by the interaction between the stator slots and the rotor magnetic poles, and it relates to rotor position as a multi-order harmonic.
Cogging torque is especially pronounced in direct-drive or low-gear-ratio joints, causing position ripple during low-speed motion.
All Facts (2)
Cogging torque is the periodic torque ripple produced in a permanent-magnet motor by the interaction between the stator slots and the rotor magnetic poles, and it relates to rotor position as a multi-order harmonic.
50%UnverifiedCogging torque is especially pronounced in direct-drive or low-gear-ratio joints, causing position ripple during low-speed motion.
50%