Applications
Magnet applications in electric motors
How magnet selection impacts motor efficiency, temperature stability, and cost.
Last updated on 2026/01/26
Why motor magnet selection matters
Motor performance depends on magnet grade, temperature stability, and magnetization direction. Small changes can impact efficiency, torque, and cost.
Typical motor constraints
- Operating temperature range and duty cycle.
- Space limitations and target torque density.
- Corrosion exposure (coolants, humidity, outdoor use).
Selection workflow
- Confirm the thermal envelope and peak temperature.
- Choose grade and temperature class to avoid demagnetization.
- Specify magnetization direction and pole pattern.
- Validate coating and mechanical tolerances.
Design notes for RFQs
- Provide rotor drawings and air gap details.
- Specify magnetization pattern (single pole or multi-pole).
- Call out critical tolerances and balancing needs.
Common sourcing risks
- Over-specifying grade without temperature data.
- Ignoring coating selection for motor environments.
- Missing magnetization details in the drawing.
Ready for an RFQ?
Share your drawings, grades, coatings, and quantities. We will coordinate supplier feedback and confirm specs.
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