Clark School Home UMD

ISR News Story

Ghodssi, Beyaz, Waits issued US patent for microgenerator

Microball bearings support the electromagnetic microgenerator.
Microball bearings support the electromagnetic microgenerator.

ISR Director Reza Ghodssi (ECE/ISR) and his former students C. Michael Waits (EE Ph.D. 2008) and Mustafa Beyaz (EE Ph.D. 2011) are co-inventors of U.S. Patent 9,083,208, “Ball Bearing Supported Electromagnetic Microgenerator,” issued on July 14, 2015.

As the critical dimensions of devices continue to shrink, novel methods and apparatus must be developed to overcome device limitations at smaller length scales. Microelectromechanical systems (MEMS), such as micro-fabricated generators, motors or other electromechanical devices, may require suitable rotational speeds for operation on a micron to sub-micron length scale. Unfortunately, conventional designs, such as air bearing rotors and the like, break down due to mechanical and vibrational instabilities, such as mass-induced mechanical instabilities caused by the addition of magnetic materials to the rotor.

This versatile microball bearing supported microgenerator improves micro electromechanical devices and methods for forming them. It allows an micro electromechanical device, such as a motor or generator or other suitable MEMS device, to be operated at sufficient speeds (e.g., rotational rate of a rotor or the like) to function on a micron length scale or below.

Waits is a team leader in the Energy and Power Division of the Sensors and Electron Devices Directorate at the Army Research Laboratory. Beyaz is an assistant professor in the Electrical and Electronics Engineering Department at Antalya International University, Antalya, Turkey.

As graduate students, both worked in the MEMS Sensors and Actuators Lab on the project to develop a microball bearings-supported electromagnetic micro-turbo-generator.

Related Articles:
Ghodssi invited speaker at Transducers 11
Book edited by Ghodssi, Lin in top 25 percent of most downloaded Springer eBooks
Nima Ghalichechian begins Ohio State tenure-track position 
Hanrahan, Waits, Ghodssi paper selected as JMM 'Highlight of 2014'
Lithium-ion battery research profiled in DOE newsletter
Young Wook Kim receives best poster presentation award
Micro-turbine research on cover of Journal of Micromechanics and Microengineering
Micro-turbo-generator research featured in Journal of Microelectromechanical Systems
Ph.D. candidate Brendan Hanrahan wins silver medal in ARL competition
Mosteller wins Dean's Master's Student Research Award

July 14, 2015


Prev   Next

 

 

Current Headlines

International Workshop on Cyber Deception and Defense addresses threats and countermeasures

Bioinspired robotics REU students present final projects

MC2 Researchers Have Six Papers Accepted to USENIX Security Symposium

Engineers Without Borders Provides Electricity for Yabucoa Elder Care Center in Puerto Rico

A New Dimension for Batteries

Former ISR Visiting Scientist Kazutomo Nishida named Honda R&D Asia Pacific president

Company Co-Founded by Rajiv Laroia Receives $121 Million Investment

John Baras to receive 2018 AIAA Aerospace Communications Award

Shneiderman to speak at Arena Civil Dialogue, Aug. 12

ISR remembers George Reynolds

News Resources

Return to Newsroom

Search News

Archived News

Events Resources

Events Calendar