The stator and rotor are the necessary parts of an electric motor. The stator is fixedly mounted on the housing, usually, the coil is wound on the stator, and the rotor is mounted and fixed on the base by bearings or bushings. The rotor has a silicon steel plate, a coil and an electric current, and under the action of the coil, a magnetic field is generated on the silicon steel plate of the stator and rotor, and this magnetic field drives the rotation of the rotor.

고정자 회전자 코일

The stator is the fixed part of the motor. The stator consists of three parts: stator core, stator winding and base. The main function of stator is to generate rotating magnetic field. The rotor is the rotating part of the motor, it consists of rotating shaft, rotor core and rotor winding. There is an excitation winding on the rotor, when excitation current is applied, as the rotor rotates under the action of driving force, an alternating magnetic field will be generated. The three-phase winding of the stator cuts off the magnetic field lines in turn, and it will induce an AC electric potential of the same size and with a 120° electrical angle difference.

Both the stator and rotor consist of an iron core made of laminated silicon steel sheet and a coarse copper winding, the wire is covered with insulation and then coated with epoxy resin, according to certain standards and methods, the winding is wound on the stator and rotor.

The stator is equivalent to the wire, while the rotor is the electromagnet. The rotor is energized and then rotated by the prime mover, creating a rotating magnetic field. Conversely, the wire (stator) cuts off the rotating magnetic field (rotor), which causes an induced potential to form in the wire, and then a switch will close the wire and current will flow through.

스테퍼 모터

Technically speaking, both the stator and the rotor have magnetic fields. The difference is that the rotor generates a magnetic field through electricity, while the stator generates a current through magnetism, collectively: the armature magnetic field.

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