The rotor includes: motor shaft, silicon steel sheet, copper strip (aluminum strip) or copper wire winding and copper head (slip ring). The squirrel cage type has no conductor part and copper head.
Generator rotor The rotating part of the generator. It is mainly composed of conductive rotor windings, magnetic cores, rotor shaft extensions, retaining rings, center rings and fans. Generator rotors can be divided into two modes, one is the pivot type and the other is the pole-rotating type. ① Pivot type: The magnetic poles are placed on the stator, and a three-phase symmetrical armature winding is installed on the rotor. When the rotor rotates, it cuts the stator magnetic field, induces three-phase electric potential in the rotor, and uses three slip rings to lead out three-phase alternating current; this method generates electricity. The machine power cannot be increased and is only used in early small generators. ② Rotating pole type: The stator is equipped with a three-phase symmetrical winding, and the rotor is equipped with magnetic poles and excitation windings. Two slip rings are used to pass DC excitation current to the rotor excitation winding to generate a constant magnetic field. When the rotor rotates, this magnetic field also rotates, and this rotation The rotor magnetic field cuts the three-phase symmetrical winding of the stator, and the three-phase symmetrical potential is induced in the three-phase winding of the stator. The output of this potential is a three-phase alternating current. Because it is output from the stator and has no moving parts, the power can be very large, and we get a wide range of applications.