Motor Industry

Electric Machines are the world’s largest consumer of permanent magnetic materials and consequently drive huge amounts of product development globally.

Bunting Magnetics has a wealth of experience in surface mounted machines and internally mounted permanent magnet machines and our engineering team is always ready to help.


mounted permanent magnet

Some common design and discussion points are;

  • Production Engineering
    • Magnet Material Choice
    • Magnet Shape / Cost
    • Magnet Performance vs Temperature
    • Magnet Operating Envelope
  • Design for manufacture.
    • Flat to Flat Magnet Assembly
    • Arc to Arc – what diameters to choose
    • Magnet shape tolerancing
    • Adhesive applications
    • Grinding tolerances / allowances
    • Interference fits
    • Avoid Tension – Support
  • Optimising for design, space envelope, torque, inertia.
    • 2D FEA
    • 3D FEA – End Effects
    • Diamerter / Length
    • Speed / Control
  • Eddy Current Reduction
    • Laminate Magnets
    • Axial
    • Circumferential
    • Lamination thickness
    • Wire cutting with electrical insulation
  • Magnet Retention
    • Carbon Fibre
    • Inconel
    • Titanium
    • Laminated sleeve
    • Ferrous high tension steels
    • Sleeve Fitting
      • High Temperature Interference
      • Press
      • Liquid Nitrogen interference
  • High Speed Rotor Effects
    • Balancing
    • De Coupling
    • Transient effects

The topic of Permanent Magnet Electric Machines is truly vast, the best way to find out more about what we can do is to get in touch here.