WARF: P150105US01

New Electrostatic Motor Design Simplifies Manufacturing


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.
OVERVIEW‘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 INVENTIONUW–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)
  • Works in macroscale devices
  • Eliminates costly vacuum components
  • Smooth, consistent torque
  • Simplifies manufacturing
  • Versatile design
STAGE OF DEVELOPMENTSimulations and modeling.
For More Information About the Inventors
Contact Information
For current licensing status, please contact Emily Bauer at or 608-960-9842.
The WARF Advantage

Since its founding in 1925 as the patenting and licensing organization for the University of Wisconsin-Madison, WARF has been working with business and industry to transform university research into products that benefit society. WARF intellectual property managers and licensing staff members are leaders in the field of university-based technology transfer. They are familiar with the intricacies of patenting, have worked with researchers in relevant disciplines, understand industries and markets, and have negotiated innovative licensing strategies to meet the individual needs of business clients.