Stator

This is what makes a motor spin. It is the collection of coils around a central ring. This will fit inside a case, and typically, the center of the Stator will be a ball-bearing to allow the Stator to spin freely. Also typically, the Stator will be firmly connected to an axis that will carry the rotational motion of the Stator to another part of the finished engine.

By controlling the flow of electrical energy in its coils, the coils exert a magnetic force (electromagnetic principle). The case will have magnets (permanent or electromagnets) on the inside of it to the external side of the ring encasing the Stator. As the Stator produces magnetic fields, they will be in opposition to the case's magnets' fields, and thus produce a force that will cause the Stator to rotate.

This is the basis of all electric motors.

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