SDM Magnetics supplies custom magnetic rotor parts for high-speed motors used in spindles, turbines, compressors, industrial systems, and electric vehicle applications. With flexible magnet material options and application-oriented design support, our rotor parts are developed to improve magnetic performance, reduce losses, and support stable operation in demanding high-speed environments.
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SDM Magnetic Rotor
As one of the most representative magnetic assemblies, rotor assemblies are consists of iron part and permanent magnet. Actually,
sintered Neodymium magnet, sintered Samarium Cobalt magnet, bonded magnet, and sintered ferrite magnet are all can be used for
rotor assemblies according to different application, motor type and assembly process. It should be noted that laminated magnets
made by magnet segmentation technology are also served to assemblies to decrease the eddy current loss.


1. **Stator:**
- The stator is the stationary part of the motor. It consists of a core made of laminated sheets of iron or steel, with slots to hold insulated copper windings. These windings are connected to an external power supply and carry alternating current (AC) or direct current (DC) to generate a rotating magnetic field.
- The main function of the stator is to produce a magnetic field that interacts with the rotor's magnetic field, causing the rotor to rotate.
2. **Rotor:**
- The rotor is the rotating part of the motor. It typically consists of a core with conductors (often copper bars or aluminum bars) arranged in slots, which are short-circuited at both ends by conducting rings or bars.
- When electric current flows through the rotor windings, it generates a magnetic field. This magnetic field interacts with the stator's magnetic field, resulting in torque and causing the rotor to rotate.

In summary, the stator creates a rotating magnetic field using the electrical power supplied to it, while the rotor reacts to this field, causing the motor shaft to rotate and thus converting electrical energy into mechanical energy. This process is fundamental to the operation of electric motors in various applications ranging from industrial machinery to household appliances.


Magnetic rotor parts are key components used in electric motors to generate rotational motion through the interaction between the rotor magnetic field and the stator magnetic field. In high-speed motor systems, rotor parts must provide not only strong magnetic performance, but also reliable structural stability, dimensional consistency, and long-term operating reliability.
At SDM Magnetics, we provide customized magnetic rotor parts for different motor types and application requirements. Depending on the design target, rotor parts can be manufactured with different permanent magnet materials and assembled according to the required motor structure, speed range, and operating environment.
One of the main advantages of SDM magnetic rotor parts is the flexibility of magnet material selection. According to different application requirements, motor types, and assembly processes, rotor parts can be made with:
Sintered NdFeB magnets
Sintered SmCo magnets
Bonded magnets
Sintered ferrite magnets
Different materials offer different balances of magnetic strength, temperature resistance, cost, and manufacturing suitability. This makes it possible to select the most appropriate rotor solution for each motor design and end-use condition.
For high-speed motor applications, eddy current loss inside the magnet is an important design consideration. To help reduce this loss, segmented magnets can be used in rotor parts. By dividing the magnet into smaller sections, the eddy current path can be reduced, helping improve thermal behavior and operating stability in high-speed conditions.
This makes segmented magnetic rotor parts a practical solution for motor systems that require higher speed, better efficiency, and more reliable long-term performance.
High-speed motors are widely used in applications that demand compact size, fast response, and efficient power conversion. In these systems, rotor parts must be carefully designed to support stable operation at elevated rotational speed.
SDM magnetic rotor parts are suitable for use in high-speed motor applications such as:
High-speed spindles for machining tools
Turbines for power generation
Compressors in industrial systems
Electric vehicle propulsion systems
Precision industrial motors
Other compact and high-efficiency drive systems
For these applications, rotor part quality directly affects motor efficiency, speed stability, and service reliability.
At SDM Magnetics, we understand that rotor parts are rarely standard for advanced motor projects. Different customers require different dimensions, magnet materials, assembly methods, and performance targets. That is why we support customized magnetic rotor parts based on actual application requirements.
Our team can support customers in selecting suitable magnet materials, optimizing the rotor structure, and matching the part design to the intended motor type and operating condition. Whether the requirement is for compact size, higher efficiency, improved loss control, or better high-speed capability, we can provide application-oriented support from design review to production.
SDM magnetic rotor parts are designed for customers who need dependable magnet solutions for advanced motor systems. With experience in permanent magnet materials and magnetic assemblies, we help customers improve product performance through better rotor part design and manufacturing control.
Key advantages include:
Multiple magnet material options for different motor applications
Support for high-speed motor designs
Segmented magnet solutions for reduced eddy current loss
Customization according to motor type and assembly process
Suitable for AC and DC motor-related applications
Reliable manufacturing support for industrial and automotive projects
If you are looking for magnetic rotor parts for high-speed motor applications, SDM Magnetics can support your project with suitable magnet materials, structure recommendations, and custom manufacturing solutions. Send us your drawing, speed requirement, motor type, and application details, and our engineering team will recommend the most suitable rotor part solution for your design.
Custom magnetic rotor parts for high-speed motors
Available in NdFeB, SmCo, bonded, and ferrite materials
Segmented magnet solutions available
Suitable for AC and DC motor applications
Designed for spindles, compressors, turbines, and EV systems
Flexible customization based on motor structure and assembly process
High-speed spindle motors
Industrial compressors
Power generation turbines
Electric vehicle drive systems
Precision industrial automation
Compact high-efficiency motor platforms
Magnetic rotor parts can be manufactured with sintered NdFeB magnets, sintered SmCo magnets, bonded magnets, or sintered ferrite magnets, depending on the application requirement.
Segmented magnets help reduce eddy current loss, which can improve thermal performance and support more stable operation in high-speed motor systems.
These rotor parts are suitable for high-speed spindles, turbines, compressors, electric vehicle systems, and other high-efficiency motor applications.
Yes. SDM Magnetics supports customized magnetic rotor parts based on motor type, size, magnet material, assembly method, and application environment.
Yes. Depending on the design and application, magnetic rotor parts can be used in both AC and DC motor-related systems.