|PROPOSAL NUMBER:||03-E2.08-8674 (For NASA Use Only - Chron: 034331)|
|SUBTOPIC TITLE:||Power Management and Distribution|
|PROPOSAL TITLE:||Self-Bearing Motor-Generator for Flywheels|
SMALL BUSINESS CONCERN
(Firm Name, Mail Address, City/State/Zip, Phone)
Foster-Miller Technologies 431 New Karner Road
Albany ,NY 12205 - 3868
(518) 456 - 9919
PRINCIPAL INVESTIGATOR/PROJECT MANAGER
(Name, E-mail, Mail Address, City/State/Zip, Phone)
Hsiang Ming Chen
431 New Karner Road
Albany ,NY 12205 -3868
(518) 456 - 9919
U.S. Citizen or Legal Resident: Yes
TECHNICAL ABSTRACT (LIMIT 200 WORDS)
Self-bearing or ?bearingless? motors perform both motor and bearing support functions but such devices have not yet achieved speeds above 15,000 rpm. The innovation proposed for a self-bearing motor-generator (M-G) will achieve speeds above 30,000 rpm, moving the technology to a new frontier, not only for the motor but the generator functions as well. As applied to a flywheel energy storage system (FESS), the concept replaces the permanent-magnet bearings, conventional M-G, as well as the need for the active damper. The self-bearing function is implemented with a proportional integral derivative control and has adjustable damping as in conventional active magnetic bearings. As a result, the flywheel end rotors are shortened substantially and could enable running at much higher speed without concerns regarding the first bending critical speed. Further, elimination of rotor parts will enhance the reliability of the mechanical system. Although a self-bearing approach could result in a less efficient magnetic bearing combined with a less efficient motor, the proposed approach will solve the efficiency problem, making it ideal for the high energy efficiencies required for FESS. With such improved efficiencies and reliability, the self-bearing M-G will serve as a modular building-block technology for the power management and distribution systems used in observation platforms for earth science missions.
POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
Successful completion of the proposed effort through Phase II will provide NASA with a permanent-magnet-based motor-generator with an integral bearing system. Potential applications range from space-based flywheels and motor-driven actuators to a wide variety of airborne and terrestrial applications.
POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
In addition to NASA needs, there is a broad range of DoD and other government agency requirements that could be fulfilled by a self-bearing PM motor. These range from applications requiring small compact motors to motor-generators for power conversion and storage. A viable self-bearing motor has been sought for many years, and the market for such a device will be nearly limitless.