Torque ripple is an effect seen in manyelectric motor designs, referring to a periodic increase or decrease in outputtorque as the motor shaft rotates. It is measured as the difference in maximum and minimum torque over one complete revolution, generally expressed as a percentage.

A common example is "cogging torque" due to slight asymmetries in themagnetic field generated by the motor windings, which causes variations in thereluctance depending on the rotor position. This effect can be reduced by careful selection of the winding layout of the motor, or through the use of realtime controls to the power delivery.

• "Torque ripple", Emetor.

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• Electric motors
• Torsional vibration
• Torque

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