The composition and component functions of the stator part of asynchronous motor products

For other equipment, seemingly simple motor products include the conversion of various energies such as electrical energy, magnetic energy, thermal energy, wind energy, and kinetic energy. For motor parts, we are more accustomed to listing them according to processing methods, such as machined parts, electrical parts, etc.; if we summarize from the function of motor operation, we can basically boil it down to the stationary part and the rotating part.

The stator part is the physically stationary part of the motor, mainly including the motor frame, stator core and windings, while the rotor part has a shaft and rotor core. The stator and rotor are supported by end covers and bearings, as well as the necessary gap structure. Rotating equipment.

Functional analysis of related parts of the stator part

The base of the stator part is the main structural component that determines the center height of the motor. It controls the radial position of the stator core and end cover, and constrains the axial position of the rotor part. In addition, the base feet of the horizontal motor are the complete machine product. An important part of installation; the frame is a key component for heat dissipation of motor products, especially for motor frames with heat dissipation ribs. The direction, size and number of heat dissipation ribs have a greater impact on the motor winding temperature rise.

From the physical location analysis, the stator core is a key component for placing the stator winding, and it is also an important component of the winding magnetic circuit. The iron core material and size have a greater impact on the motor loss. Regarding the groove shape and silicon steel sheet material grade, the impact of the motor performance If it affects us, we will choose another time to proceed. For small motors, the stator core is integrated, while for large motors such as low-voltage, high-power and high-voltage motors, the stator and rotor cores are constructed with radial ventilation channels.

The stator winding is the core component of motor products and is the main body that generates the rotating magnetic field of the motor. For small and medium-sized motors, soft windings are used, while for large motors, formed windings are used more often. According to various factors such as motor power, heat resistance level and other performance indicators, there are many types of electromagnetic wire types and winding types. A very important component of the winding is the insulation material, which is also matched to the performance requirements of the motor.

From the functional analysis of motor parts, the stator part should have the following functional characteristics:
(1) The stator core with windings should become a solid whole through standardized insulation treatment to ensure the basic requirements for winding insulation performance, vibration performance and electrical reliability of motor products;
(2) Multi-circle coaxial problem in the stator part. The core position of the machine base, the diameter of the stop openings at both ends, and the inner and outer circles of the stator core should be coaxial to ensure uniform stator and rotor air gaps after the motor is assembled.
(3) The rationality of the matching tolerance between the stator core and the inner circle of the machine base. In order to ensure smooth heat dissipation channels and radial matching during the operation of the motor, the iron core of the base should not be deformed or have unqualified processing defects. For small motors, of them use a process of dipping paint and then pressing into the base, and some motors adopt the paint dipping process with the frame. Under different process conditions, there will be some small differences in the size matching relationship between the stator and the frame.
(4) Stator end size control. In terms of physical space, the stator end should ensure that its relative position to the machine base and the end cover after assembly meets the requirements. On the other hand, the connection, fixation and extraction of the motor wires should also be taken into account.
(5) The position control of the outlet hole of the motor base is very important. On the one hand, the issue of penetration must be considered, and at the same time, issues such as protection and user installation and use must be taken into consideration. In this aspect, it is an issue ignored by manufacturers.