Wisconsin Alumni Research Foundation

New Electrostatic Motor Design Simplifies Manufacturing
WARF: P150105US01

Inventors: Daniel Ludois, Baoyun Ge

The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing cost-saving electrostatic machines with features for smooth torque production.
‘Electrostatic’ motors and generators make torque using moving plates and electrical fields. They are lighter and cheaper than conventional electromagnetic designs that rely on iron, copper windings and rare earth materials.

Electrostatic machines work well in small-scale microelectromechanical systems (MEMS), which allow extremely small gaps between rotor and stator elements. Larger scale machines require complex vacuum components that make manufacturing more difficult.
The Invention
UW–Madison researchers have developed a versatile design for large-scale electrostatic machines. The new design features circular rows of pegs attached to plates and immersed in dielectric fluid. The pegs come in and out of alignments as the plates rotate. The shape, length and positioning of the pegs can be varied as needed to achieve higher torque.
  • Industrial/automation machines (where servo electric motors are used)
Key Benefits
  • Works in macroscale devices
  • Eliminates costly vacuum components
  • Smooth, consistent torque
  • Simplifies manufacturing
  • Versatile design
Stage of Development
Simulations and modeling.
Additional Information
For More Information About the Inventors
For current licensing status, please contact Emily Bauer at [javascript protected email address] or 608-960-9842