Avanco Composites (Herford, Germany) has developed a press-fitted carbon fiber-reinforced polymer (CFRP) retaining sleeve designed to secure permanent magnets in high-speed rotors without adhesives or added thermal stress. The company demonstrated the design in a project with partner WEKA Elektrowerkzeuge (Neubulach, Germany), and positions the sleeve for rotor applications spanning the automotive, industrial and aerospace sectors.
In a linkedIn post, Avanco reports that the sleeve’s proprietary press-fitting process generates high preload against the rotor, securing the magnets and preventing lift-off at high rotational speeds. The process introduces no thermal stress during assembly and requires no adhesive bonding to hold the sleeve in place, with the design suited to rotor diameters ranging from 30 to 300 millimeters.
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