Why does the outer frame of an induction motor have slots on its outer periphery?

The reason for the slots on the outer periphery of the frame of an induction motor.

The outer periphery of the frame of an induction motor is designed with slots, primarily to accommodate and secure the stator winding. The following are the specific reasons and related details:

The installation of the stator winding

The stator winding of an induction motor needs to be installed in the slots of the outer frame (stator core). These slots provide physical support, allowing the windings to be securely fixed in the correct position, thereby ensuring the normal operation of the motor.

Generation and Control of Magnetic Fields

By setting slots on the outer frame periphery and installing windings, a rotating magnetic field can be effectively generated and controlled. The relative motion between this rotating magnetic field and the rotor windings results in the generation of induced electromotive force and current within the rotor windings, which in turn produces electromagnetic torque, driving the motor to rotate.

Improve efficiency and performance

The specific slot design (such as the number of slots, the arrangement of slots, etc.) helps to optimize the performance of the motor. For example, by adjusting the number and configuration of slots, it is possible to reduce the electromagnetic noise during motor operation and improve efficiency.

Conclusion

In summary, the slots on the outer periphery of the frame of an induction motor are designed to install and secure the stator winding. This is done to generate and control the rotating magnetic field, thereby ensuring the normal operation and efficient performance of the motor.