Structural Distribution and Function of Asynchronous Motor Products - Stator Section

Relative to other equipment, seemingly simple motor products include electric energy, magnetic energy, heat, wind, kinetic energy and other energy conversion. For motor parts, we are more accustomed to according to the processing method listed, such as machining parts, electrical parts, etc.; if the function from the motor operation is summarized, we can basically be attributed to the static part and the rotating part.

The stator part is the physical static part of the motor, mainly including the motor base, stator core and windings, while the rotor part has a shaft and rotor core, stator and rotor through the end cover and bearings as a support, as well as the necessary clearance frame to become a possible rotating equipment device.

Functional analysis of parts related to the stator section

The stator part of the base is the main structure of the motor to determine the size of the center height, control the radial position of the stator core and end cap, and constraints on the axial position of the rotor part; In addition, horizontal motor base foot is an important part of the installation of the whole product; the base is a key part of the motor product heat dissipation, especially for the motor with heat dissipation tendons of the motor base, heat dissipation tendons, the direction, size and number of the motor's windings have a greater impact on the temperature rise. The direction, size and quantity of the heat dissipation rib have a great influence on the temperature rise of the motor winding.

From the physical location of the analysis, the stator core is placed in the stator winding of the key components, but also an important component of the winding magnetic circuit, the core material and size of the motor loss has a greater impact on the groove and silicon steel sheet material grade for the performance of the motor, we will choose another time. For small motors, the stator core adopts one-piece type, while for large motors such as low-voltage high-power and high-voltage motors, the stator and rotor core adopts the structure with radial ventilation channel.

The stator winding is the core component of the motor product, and is the main body of the motor's rotating magnetic field generation. For small and medium-sized motors, soft windings are used, while for large motors, more molded windings are used. According to various factors such as motor power, heat resistance level and other performance indexes, there are various types of solenoid type and winding type. A very important part of the winding is the insulating material, which also matches the performance requirements of the motor.

From the functional analysis of the motor parts, the stator part should have the following functional characteristics.

Stator cores with windings shall become a solid whole through standardized insulation treatment to ensure the basic requirements of winding insulation, vibration performance and electrical reliability of motor products.

Stator part of the multi-circle coaxial problem. The core position of the seat, the diameter of the two end stops and the inner and outer circles of the stator core should be coaxial, in order to ensure that the stator-rotor air gap is uniform after the assembly of the motor.

Stator core and base inner circle with the reasonableness of the tolerance. In order to ensure that the motor running process of heat dissipation pathway smooth, and radial fit relationship, the seat core should not appear deformation and processing defects; for small motors, most of the first dipping paint and then pressed into the seat of the process, and there are some motors with the seat dipping paint process, under different technological conditions, the size of the stator and the seat with the relationship between the dimensions of the small differences.

Stator end size control. Stator end in the physical space, should ensure that its relative position with the base and assembly after the end cover meets the requirements, on the other hand, should also take into account the connection of the motor lead wire, fixing and lead out.

Motor chassis out of the hole position control is very important, on the one hand, to consider the lead out of the problem, but also to take into account the lead protection, the user installation and use of the problem, precisely in this regard, is ignored by most manufacturers.