Torque density
Optimized magnet grades and rotor arrangements increase usable torque in a compact package.
Industrial Automation
Servo Motors: Precision Magnet Solutions for Dynamic Drives
High-performance NdFeB magnets and matched magnetic assemblies for high dynamics, exact positioning and reliable control.
Engineering
Permanent magnets for precise control loops
Servo motors must control torque, speed and position with high dynamics and repeatability. The quality of the magnetic circuit directly affects torque density, smooth operation, efficiency and thermal capability.
Spacemagnets Europe supports the selection of suitable NdFeB grades, rotor-segment design and the development of ready-to-install magnetic assemblies – from initial simulation through series delivery.
High dynamics
Fast acceleration and precise response to command changes.
Compact design
High magnetic energy density for powerful, space-saving motors.
Exact positioning
Homogeneous magnetization and tight angular tolerances for smooth control loops.
Series consistency
Documented material, dimensional and magnetic tests for repeatable performance.
What matters in servo-motor magnets
Magnetic precision
Tight magnetization, dimensional and angular tolerances support low torque ripple.
Temperature stability
SH and UH grades maintain stable properties at elevated operating temperatures.
Loss reduction
Segmentation and adapted geometries can reduce eddy-current losses and heat generation.
Corrosion protection
Application-specific coatings protect NdFeB magnets against moisture and aggressive media.
Mechanical security
Defined bonding, encapsulation and assembly concepts retain magnets at high rotational speeds.
Typical magnet grades for servo motors
Based on common industrial servo-motor, stepper-motor and linear-motor applications, the following NdFeB ranges are particularly relevant:
| Magnet grade | Typical temperature range | Suitable application |
|---|---|---|
| N38SH–N50SH | up to approx. 150 °C | Dynamic servo drives with high power density |
| N38UH–N45UH | up to approx. 180 °C | Higher-temperature motors and compact axis drives |
The permissible operating temperature depends on factors including magnet geometry, operating point, coating, cooling and ambient conditions. Final selection is therefore project-specific.
From individual magnets to a matched drive solution
Rotor segments and custom geometries
Arc, segment and customer-specific magnets with defined magnetization direction and tight dimensional tolerances.
Magnetic assemblies
Pre-assembled rotor packs, bonded segments and secured assemblies reduce installation effort and process risk.
Resolvers and feedback
Magnets, magnetic assemblies and resolvers can be engineered as a matched system for precise position and speed control.
Typical applications
Industrial roboticsMachine toolsPackaging equipmentPrinting and textile machineryTest and measurement systemsAutomated assembly lines
Engineer your servo-motor project with us
Send us your torque, speed, temperature range, installation space and other boundary conditions. Our engineering team supports magnet-grade selection, geometry, magnetic-circuit design and assembly concepts.
Engineering resources
Magnet and resolver solutions for servo drives
Dynamic servo motors benefit from high-performance neodymium magnets, engineered magnetic rotor assemblies and robust resolver position feedback. The coordinated design supports torque density, smooth running and reliable rotor-position sensing.