Rotor Design

Calnetix currently uses two primary types of rotor construction to provide high speed rotating assemblies in mass production. Although two types are generally used, Calnetix is currently developing and testing other types of high speed rotor constructions.

Containment of these rotors is provided by either a high strength metal sleeve or an advanced graphite-composite sleeve. Both offer unique advantages to the system and motor/generator performance.

Calnetix has exclusively acquired, from a division of Dupont, a unique carbon graphite winding process.This proprietary process is the only existing technology available to push tip speeds to over 1200 feet per second.

Calnetix selects the optimum approach to meet your system performance requirements and is experienced in utilizing both approaches in development and production. Some of the design criteria that determine the rotor composition are:

• Tip speeds
• Operation temperatures
• Type of bearings utilized
• Magnetic bearings
• Air foil bearings
• Oil lubricated ball bearings
• Hybrid ceramic bearings
• Fluid film bearings
• Stiffness required
• Operating bending modes
• Operating gases or fluids

Calnetix has designed PM machines that operate with a wide variety of bearings and operating conditions. Calnetix thoroughly understands the needed characteristics of the rotor for each application or working environment.