High-Rate Flywheel Energy Source for Electro-Mechanical Actuators Used for Thrust Vector Control

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 22802
Amount: $69,543.00
Phase: Phase I
Program: SBIR
Awards Year: 1994
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
161 First Street, Cambridge, MA, 02142
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Richard L. Hockney
 (617) 661-0540
Business Contact
Phone: () -
Research Institution
The innovation proposed is a flywheel energy storage system designed specifically to serve as a high rate energy source for electro-mechanical actuation (EMA) systems. Recent advances in composite materials, permanent magnet motors, bearings, and power control electronics have led to flywheel energy storage systems with specific power and energy densities exceeding those of virtually all other energy storage systems for applications requiring high power, short duration pulses of electrical power. This technology is ideal for the development of light weight, low volume, low maintenance, water resistant modules capable of delivering 25KW-100RM at over 200 VDC for up to several hundred milliseconds. The system proposed integrates new developments in flywheel rotors, electrical converters, motor/generator, and bearing technologies. The baseline energy storage module incorporates a graphite epoxy flywheel, silicon nitride bearings, and a neodymium/iron PM motor driven by a compact pulse width modulated converter operating at 80 kHz. The goal of this program is to develop an energy storage module concept having outstanding energy and power density characteristics. Phase I will consist of concept experimental investigations, definition, initial design analysis, and detailed planning for Phase II. Phase II will consist of design, fabrication, and testing of the prototype hardware concept.

* Information listed above is at the time of submission. *

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