What is the “stack length” of a motor?

The stack length of a frameless motor refers to the length of the lamination stack that provides rigidity to the stator. The stack is built up of several individual laminations which help to reduce eddy currents. In slotted motors like those in the Omni+ Series, the stack includes the iron teeth around which copper wire is wound. The stack length does not include the winding end-turn lengths which are non-torque producing.

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