Charlotte Blair
Ansys Employee
 No,  Torque ripple arises due to imperfect commutation of the phase currents, Ripple introduced in the current waveform due to chopping and due to reluctance variation, due to slotting, in the magnetic circuit as the rotor rotates which is called cogging. So, Cogging is a part of torque ripple and torque ripple is a combined effect of many factors.