Permanent magnet motor supply: the motor rotor is also a rotating part of the motor. The motor is composed of rotor stator. It is used to realize the conversion of electrical energy mechanical energy mechanical energy electrical energy. Motor rotor is divided into motor rotor generator rotor.
When the main rotor rotates at high speed its speed is close to the critical speed, the shaft will produce deflection deformation. Mechanical damage may be caused by resonance. The natural frequency of the transverse vibration of the rotor is multi-step, so its corresponding critical speed is multi-step. When the working speed of the rotor is lower than the first critical speed, it is called rigid rotor, when the working speed of the rotor is higher than the first critical speed, it is called flexible rotor.
In the induction motor, the rotor is composed of a shaft core a closed conductor embedded in the core. Driven by the rotating magnetic field generated by the stator winding, it produces high-speed rotating motion. Both ends of the rotor adopt rolling bearings are installed fixed in the end cover of the motor housing.
Permanent magnet motor supply: three important devices in the motor rotor are:
1. Armature core part: its function is to embed armature winding flux, in order to reduce eddy current loss hysteresis loss in armature core when motor works.
2. Armature part: the function is to generate electromagnetic torque induced electromotive force, carry out energy transformation. Armature winding has many coils glass fiber wrapped flat steel copper wire strength enameled wire.
3. Commutator is also called commutator. In DC motor, its function is to change the current of DC power supply on the brush into the communication current in the armature winding, so that the tendency of electromagnetic torque is stable. In DC motor, it changes the communication electromotive force of armature winding into the output DC electromotive force on the brush end.