In short, three-phase asynchronous motor stator and rotor mainly by the two major components, while the air gap between stator and rotor is generally 0.25 ~ 2mm, because the gap is also a part of the motor magnetic circuit, when the gap is large, reluctance on the big, exciting current is also large, so the air gap can not be too large, while the smaller the process more difficult, but also easy to wipe Heart.

    A stator part.

    Stator: the motor fixed and called the static part of the stator. It includes the stator core, stator windings and machine seat and other parts.

    stator core: It is part of the motor magnetic circuit, in order to reduce the stator iron loss in mind, the thickness of core material tends to be used for 0.35 ~ 0.5mm, the surface insulation layer with a stacked silicon steel lamination formed. Core punching red circle with uniformly distributed within the slot, slot to put embedded stator windings. Slots are open, semi-open type and semi-closed-type three kinds.

    Semi-closed-type tank generally used for small electric motors, the efficiency advantages of electric motors and power factor higher drawback is winding wire and insulation are embedding more difficult; semi-open-groove can be embedded in place forming windings are used for large and medium-sized motors; openings groove can be embedded in place through the winding insulation treatment, mainly for high-voltage motor.

    stator windings: It is part of the motor circuit, is to pass into the symmetrical three-phase alternating current rotating magnetic field generated by the composition of three-phase symmetrical windings, we use u1, v1, w1, representing the first end of the three windings in order to u2, v2 , w2 represent the end of the three windings, so the motor stator core at the embedded end line, out of the line after the end of the general had six qualifying u1, v1, w1, u2, v2, w2, motor assembly, we must these three windings of the six outlet side diverted to the motor wiring box, we can according to need access into a star or triangle, the general 3KW following are connected into a star, other power connected as triangles.

    Stator windings is the most important part of the motor in order to ensure normal working winding, winding insulation are reliable, general insulation are:

Slot Insulation: To prevent winding of the core (prefecture) and short-circuit - with the insulating paper;

    Inter-turn insulation: To prevent winding inter-turn short circuit - with the wire itself, the insulating layer;

    Interlayer insulation: For double-layer winding, the same as the insulating materials and tank.

    Insulation End-white Insulation: white pad of paper insulated triangle, and the nose with a cloth bandage.

    Base: the role of a fixed stator core, and rotor supported by two end caps, while protecting the whole Motors section and dissemination of the electromagnetic motor is running in the heat, so the machine seat enclosed motor heat sink out there to increase the cooling area, In order to facilitate the motor transport, motor machines are equipped with seat rings.

    Its materials are mainly cast iron (small motor), steel (CZ, CBZ, large-scale high-voltage motors), aluminum (1AL series).

    Part of the Rotor

    Rotor: The rotating part of the motor is called the rotor, mainly by the rotor core, rotor winding and rotor so on.

    1. rotor core: is also a part of the motor magnetic circuit, generally with a thickness of 0.5mm with each other insulation layers made of silicon steel punching, punching a uniform distribution of red cylindrical tank, built to accommodate the rotor winding.

    2.rotor windings: the role of induced electromotive force and current generated, and under the influence of rotating magnetic field of electromagnetic torque Ershi rotor rotation. Rotor windings according to the structure can be divided into two kinds of cage type and Wound.

   (1) cage type rotor: there are single-cage type rotor cage type, double-cage and deep-trough structure. The single-cage-type according to different materials, there can be divided into two types, one is to the rotor conductor, both ends of the short-circuit liquid ring and a cast aluminum fan made (cast aluminum rotor); the other is at the core of each of the rotor  a tank inserted a copper strips, and each end of the core with a copper for the copper strips welded to each of the root (High Voltage) .

   (2) Wound Rotor: refers to the wire trough embedded in the rotor and the stator windings have the same number of pole three-phase symmetrical windings, generally are connected into a star, that is the end are connected together, and the first side through the slip ring and brushdevice and the external circuit connected to. (YZR)

    axis: the role of supporting the rotor core and winding, and deliver motor output mechanical torque, while ensuring that the stator and rotor air gap between the have a certain uniformity.

    Other accessories

    1. cover: installed in the aircraft seat on both sides, bearing interior placed bearings, to play a supportive role in the rotor and to maintain the stator and rotor concentricity between the requirements.

    2. bearings and bearing caps: Bearing support shaft rotation, Y160 more plus bearing cap.

    3. fan and fan cover: shaft driven fan with rotation, since the role of cooling the motor, the wind shield to protect fan.

    4. outlet and the outlet box lid seat: installed on the machine pedestal, protect qualifying section.

    5. plate: mark the main technical data, model, serial number, rated power, voltage, current, frequency, speed, protection class, noise levels, working system, insulation levels, access method, weight and date.