About Motor Stator And Rotor Cores

What Are the Stacking Rivet Points of Motor Stator and Rotor Cores?

The stacking rivet points of stator and rotor cores are mainly divided into three types:

Round Buckle Points: This type is commonly used in stepper motors. It has an advantage that the depth of the buckle point cannot be too deep-if it is too deep, it cannot be buckled properly. This is beneficial for reducing eddy currents in the motor and allows better control of temperature rise.

Square Buckle Points: Also called V-shaped rivet points, square buckle points are also relatively common. Compared with round buckle points, they have lower requirements for the precision of the punch press. Their disadvantage is that they may be pressed too deep, causing certain damage to the insulating layer of the core stamped sheets. If the requirements are not too high, this type of square buckle point can be used.

Arc-Shaped Rivet Points: These are used for twisted-slotted cores. To achieve proper lamination, an arc shape is usually required. Twisted-slotted cores are also used for cores with high requirements for dynamic balance. The twisting of the slots is performed after the rotation process.

Each of the three types of stacking rivet points has its own advantages and is selected based on specific needs.

Features of Motor Stator and Rotor Cores

Quality Material & Low Loss: Made by stacking cold-rolled electrical steel sheets, it has high magnetic permeability. The insulating varnish on the surface helps reduce energy consumption.

High Precision & Strong Adaptability: The stator has slots for embedding windings; the rotor has different slot designs based on motor types (e.g., squirrel-cage). The air gap (between stator and rotor) must be evenly controlled at 0.2-1mm.

Good Working Condition Resistance & Stability: It can work at 55-130℃, resists overload and vibration, and is suitable for scenarios like home appliances and new energy vehicles.

Which Fields Are Motor Stator and Rotor Cores Used In?

They are used in home appliance industrial automation, current 5G base stations, and new energy vehicles. On a larger scale, they are used in the core motors of new energy vehicles, as well as in motors for car windows and steering wheel power assist. On a smaller scale, the vibration motor in mobile phones also belongs to this category of motors.