Factors affecting the layout of iron core laminations in motor rotors

Analysis of factors affecting the layout of motor rotor core laminations by external rotor laminations manufacturers

The iron core punch of the motor rotor is a commonly used anti-interference component in electronic circuits, which has a good suppression effect on high-frequency noise and is generally made of ferrite materials. Many people are not familiar with the stator and rotor iron cores. Below, the motor stamping manufacturer will introduce the functional characteristics of the motor rotor iron core stamping and the factors that affect the layout of the rotor iron core stamping.

1. Low coercivity and high initial magnetic permeability: can reduce the operating current of the leakage switch.

2. Full magnetic induction intensity is high: it is conducive to selecting higher magnetic induction points for the task.

3. High magnetic permeability of rotor core punching: greatly improves the accuracy of the transformer and reduces the ratio difference.

4. Lightweight and cost-effective: The price is significantly better than that of Permalloy.

5. Has outstanding overload resistance and temperature stability: can operate for a long time at 55-130 ℃.

As a typical mold with high efficiency, high precision, and long lifespan, the application scale of rotor core punching die is becoming increasingly wide. As a key factor in the success or failure of mold planning, strip layout basically confirms the structure of the entire mold and directly affects the production quality of parts. There are many factors that affect the layout of strip materials in practical production. Generally, for the progressive die of rotor iron core punching, they can be summarized as follows:

(1) Product structure. It is the primary factor affecting the layout. Generally includes:

① The shape, standards, and precision requirements of the stator, rotor, and secondary stator;

② The requirement for the stator and rotor to have loose pieces or iron cores (divided into stacking rivets for both stator and rotor, stacking rivets for one loose piece, and both being loose pieces) will affect the planning of the forming process and the cutting process;

③ Does the rotor need to be modified? If it needs to be modified, the orientation of the arrangement needs to be considered. When arranging, it may be necessary to add empty workstations.

(2) Layout type. Single row, double row, and sometimes three row sampling are generally used, and the unevenness of data utilization is a primary criterion for selection.

(3) Mold structural elements. For products that require changes in the stacking and riveting of requirements, it is necessary to consider the space for the arrangement of the changes, often requiring the addition of empty workstations. In the motor core progressive die, a pressure plate is generally used to fix the convex die on the convex die fixing plate. The pressure plate is connected by screws, and when arranging, it is necessary to consider whether there is sufficient pressure plate space. The method of discharging the iron core using a belt or a guide cage will affect the mold structure.

(4) Customer's special requirements. The primary requirement is based on the customer's own production situation. For example, in order to reduce costs, when there are thickness uniformity errors in the silicon steel sheet materials used for punching, customers generally require a 180 degree rotation during the riveting process to ensure the height of the iron core is in service, which will affect the layout.