High Power Density Electric Motors for Hybrid Electric Air Platforms

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$94,401.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
W31P4Q-10-C-0015
Award Id:
91713
Agency Tracking Number:
08SB2-0284
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
303 Bear Hill Road, Waltham, MA, 02451
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
004627316
Principal Investigator:
JamesGoldie
Principal Engineer
(781) 890-1338
jgoldie@infoscitex.com
Business Contact:
CherylBeecher
Contracts Manager
(781) 890-1338
cbeecher@infoscitex.com
Research Institute:
n/a
Abstract
An electric motor is proposed that will achieve a power density of 5 hp/lbm and an efficiency greater than 95%, when delivering 7 hp of mechanical power at a speed of 8400 rpm. This capability, not available from current electric motors, is achieved by arranging high energy-product permanent magnets in a novel configuration expressly designed to deliver highly-concentrated flux densities to the stator windings at minimum weight. The proposed motor will be tailored to the geometry of a ducted fan suitable for rotorcraft, with the aim of providing the key enabling element in a 'hybrid electric' rotorcraft drive train, in which an alternator, electric power distribution, and high power density motor(s) deliver power from the gas turbine to the ducted fan(s) (rather than a mechanical transmission and multiple rotating shafts). The potential benefits are reduced maintenance, increased redundancy, reduced vulnerability to ground fire, and rotor speed control. The Phase I design study will undertake (1) motor integration with a specific ducted fan, (2) motor cooling analysis, (3) rotor structural analysis, (4) motor drive analysis, and (5) optimization of the motor design parameters. In Phase II a prototype fan and motor will be tested against the desired power and efficiency goals.

* information listed above is at the time of submission.

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