The rotor core is a crucial component in the motor of a new - energy vehicle. It is usually made of silicon - steel sheets with good conductivity, which are laminated together. The rotor core, together with the stator core and the air gap between the stator and the rotor, forms the complete magnetic circuit of the motor.
In permanent - magnet synchronous motors, permanent magnets are typically embedded in the rotor core. In induction motors, the rotor usually consists of a squirrel - cage winding. The rotor rotates under the drive of the rotating magnetic field of the stator, thereby outputting mechanical energy to the outside.
The manufacturing process of the rotor core includes stamping and laminating the silicon - steel sheets, and then forming them by welding the outer circle of the silicon - steel sheets, self - locking, riveting, or gluing. The design of the magnetic steel slots in the core also varies according to different motor requirements, and common shapes include linear, V - shaped, double - V - shaped, and others. In addition, the rotor core needs to be matched with the shaft. Common matching methods include using keys, lugs, or interference fits.
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