Wraptite® composite sleeving is a high-strength, low-density containment solution for permanent magnet rotors in high-speed motors and generators, designed to replace metallic sleeves and improve efficiency by reducing eddy currents and enabling tighter air gaps. Available in carbon fiber, Zylon fiber, and glass fiber composites with epoxy, cyanate ester, or BMI-based resins, it is applied either by direct winding or interference fit. The sleeve can withstand hoop stresses up to 1300 MPa when wound in place and up to 2000 MPa when pressed on, with an operating temperature limit of 170°C. It is freely machinable to tight tolerances and minimally interferes with magnetic fields. Applications include automotive, motorsport, oil and gas, aerospace, and industrial systems.
Arnold Magnetic Technologies offers composite and metallic encapsulation solutions for a wide range of permanent magnet systems and applications.
While metallic sleeved magnet containment solutions are used extensively for magnet containment, Wraptite composite sleeves offer a superior design alternative for today’s higher performance applications in which rotational speeds exceed 50K RPM. In addition to RPM, Wraptite encapsulation is a perfect fit for systems that must operate reliably in extreme conditions while reducing system weight. Applications with these characteristics are found in automotive, motorsport, oil and gas, aerospace and general industrial systems.
KERS — Kinetic Energy Recovery System, which includes a composite sleeved RECOMA® SmCo magnet rotor for a 50,000+ RPM, 100KW+ system
Electric Turbo Charger — Inconel or composite sleeved RECOMA® SmCo magnet rotor incorporating Arnon Silicon Steel thin laminations that operates at > 100,000 RPM
High Power Density Cabin Air Pressure Motor — Inconel-sleeved RECOMA® SmCo balanced rotor, which is part of 180KW system that operates up to 170°C
Wraptite composite materials include carbon fiber, Zylon fiber and glass fiber composites using a range of epoxy, cyanate ester and BMI-based resin systems. Our technology includes the winding of multi-filament tows directly over the rotor to be contained, or the production of sleeves which are pressed into position to produce an interference fit.
| Arnold Magnetic Technologies | |
|---|---|
| Product Category | Encapsulants and Potting Compounds |
| Product Number | Wraptite® |
| Product Name | Carbon Fiber Encapsulation |
| Cure / Technology | Wound in place or pressed on sleeve |
