Stator is the part of the motor or generator that is stationary. The stator is composed of a stator core, a stator winding and a base. The main function of the stator is to generate a rotating magnetic field, and the main function of the rotor is to be cut by magnetic lines of force in a rotating magnetic field to generate (output) current.
The stator consists of a base, a stator core, a coil, and other structural components that hold these parts. The base is used to fix the iron core. For the suspension generator, the base is used to bear the full weight of the rotating part; the iron core is part of the magnetic circuit of the generator; the coil forms the circuit of the generator.
Machine base
The base is usually cast iron, and the large asynchronous motor base is usually welded with steel plates. The base of the micro motor is made of cast aluminum. There is a heat dissipation rib on the outer surface of the closed motor to increase the heat dissipation area. The end caps of the protective motor have ventilation holes at both ends, so that the air inside and outside the motor can be directly convected to facilitate heat dissipation.
The main function of the generator base is as a support structure for the stator core laminations, which bears the torque of the stator and transmits it to the foot; the passage of the cooling gas constitutes the support structure of the bearing, the frame and the cooler.
Stator core
The stator core is the main magnetic circuit of the stator, together with the mounting and fixing components of the stator windings. The stator core is composed of a fan-shaped punching piece, a ventilation groove piece, a tooth pressing plate, a tension bolt, a supporting block, a positioning rib and the like.
Coil
The stator windings of large hydro-generators mostly use double-wave windings of strip coils (also known as wire rods). The strip-wave windings are characterized by fewer end connections and convenient replacement. For water-cooled generators, a single-layer wave winding can also be used, which simplifies the cooling water line.
