Induction Motor Types
- Conventional asynchronous motor
- Speed adjusting motor
- Brake motor
- Reversible motor
- Torque motor
The main principle is electromagnetic induction between rotor and stator, induction current in the rotor to achieve electromechanical energy conversion of the motor. The stator of induction motor is composed of the stator core, stator winding and frame.
The rotor consists of rotor core, rotor winding and rotating shaft. The rotor core is also a part of the main magnetic circuit, generally made of 0.5mm thick silicon steel sheet stacked, the core is fixed on the shaft or rotor bracket. The whole rotor is cylindrical in appearance. Rotor windings are classified into cage type and wound type.
Under normal circumstances, the rotor speed of induction motor is always slightly lower or slightly higher than the rotating magnetic field speed (synchronous speed), so induction motor is also called "asynchronous motor".
When the load of the induction motor changes, the speed and slip of the rotor will change accordingly, so that the electromotive force, current and electromagnetic torque in the conductor of the rotor will change accordingly to meet the needs of the load. According to the positive and negative slip and size, induction motor has motor, generator and electromagnetic brake three operating states.
