Wisconsin Alumni Research Foundation

Engines & Power Electronics
Engines Power Electronics
Dual-Rotor, Radial-Flux, Toroidally-Wound, Permanent Magnet Machine with High Efficiency and High Torque Density
WARF: P02287US

Inventors: Thomas Lipo, Ronghai Qu

The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing a dual-rotor, radial-flux, toroidally-wound, permanent magnet machine that simultaneously exhibits both high efficiency and high torque density.
Overview
High torque density and high efficiency are two of the most desirable features of electrical machines. A significant amount of research over the past two decades has focused on improving these parameters. Several new motor topologies have been proposed to increase efficiency and torque density; however, these designs use rare earth magnets (i.e., neodymium-iron-boron magnets), which drive up the materials cost of these machines. In addition, some of these topologies are restricted to low speed applications.
The Invention
UW-Madison researchers have developed a machine topology suitable for high speed applications that simultaneously exhibits high efficiency and high torque density. Their dual-rotor, radial-flux, toroidally-wound, permanent magnet machine also employs inexpensive ferrite magnets, making these machines inexpensive to produce.
Applications
  • Aeronautics
  • Wheel motors for hybrid vehicles
  • Generators
Key Benefits
  • Provides both high torque density and high efficiency
  • Possesses high overload capacity
  • Low-cost
  • Suitable for moderate speed and high speed applications
Additional Information
For More Information About the Inventors
For current licensing status, please contact Michael Carey at [javascript protected email address] or 608-960-9867

WARF