The permanent magnets produce an attraction force to all magnetic materials. Cogging is an result of the iron core motor design. The iron core has “preferred” positions relative to the magnets, and the motor must vary its thrust force to overcome these positions. This results in a motion that is less smooth than that of an ironless linear motor, and can be compared to moving over an old-fashioned washboard. For more information please see: “What is done to reduce the cogging effect of Iron Core motors?”
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Mike Rolink and Stefan Jansen
Application Engineers
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