WARF: P140216US01

Combined Capacitor/Inductor Reduces Circuit Bulk


Daniel Ludois

The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing a method for integrating capacitors and inductors into a single energy storage component.
OVERVIEWInductors and capacitors are fundamental building blocks in many electrical devices and provide energy storage. Inductors store energy in the form of a magnetic field in the vicinity of a coiled conductor. Capacitors provide for energy storage in the form of an electric field generated between two plates of different voltage separated by an insulator.

The physical sizes of these components make it difficult to fabricate smaller circuits.
THE INVENTIONA UW–Madison researcher has designed a combination capacitor/inductor configured to share energy storage volumes, thereby significantly reducing the bulk of devices. In essence, the capacitor incorporates into its layers a material of high magnetic permeability (e.g., iron or an iron alloy laminated with a nonferrous metal) so that it may fit into the inductor coil in place of the normal core.
  • Manufacturing integrated capacitors and inductors
  • Power electronics for aerospace, automotive applications and utility/microgrids
  • Compact package
  • Component size can be reduced up to 50 percent
  • Simple to manufacture
  • Ideal for applications where space is at a premium
STAGE OF DEVELOPMENTA preliminary prototype and testing have been carried out.

The development of this technology was supported by the WARF Accelerator Program. The Accelerator Program selects WARF’s most commercially promising technologies and provides expert assistance and funding to enable achievement of commercially significant milestones. WARF believes that these technologies are especially attractive opportunities for licensing.
Contact Information
For current licensing status, please contact Emily Bauer at or 608-960-9842.
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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.