Core/Shell Composite Soft Magnetic Material for Advanced Motors (REVISED)

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$99,986.00
Award Year:
2007
Program:
SBIR
Phase:
Phase I
Contract:
DE-FG02-07ER84787
Award Id:
84271
Agency Tracking Number:
82219
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
133 Defense Highway, Suite 212, Annapolis, MD, 21401
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
153908801
Principal Investigator:
Todd Heil
Dr
(410) 987-8988
theil@techassess.com
Business Contact:
Sharon Fehrenbacher
Mrs
(410) 224-3710
sharon@techassess.com
Research Institute:
n/a
Abstract
For hybrid electric vehicle (HEV) applications, the Department of Energy (DOE) is directing an aggressive program to achieve rapid progress in permanent magnet (PM) machine development. To achieve DOE goals, PM motors must operate at twice the frequency of current electric motors used in hybrid-electric vehicles. Achieving these goals will require rotor and stator core materials with high electrical resistivity to reduce eddy currents and decrease total core losses during high frequency operation. This project will reduce core losses by using a powder metallurgy approach to create soft magnetic, high-resistivity, rotor and stator core materials. In particular, soft magnetic alloy powders will be coated with a nanolayer of a high resistivity, ferrimagnetic ferrite. The powders will be used to create dense composite parts with low porosity. This approach will isolate the electrically-conductive ferromagnetic regions with a shell of high resistivity ferrimagnetic material, thereby reducing eddy current losses while maintaining magnetic exchange coupling between metallic ferromagnetic regions. This exchange coupling is necessary to achieve high permeability materials with low hysteretic losses. Commercial Applications and other Benefits as described by the awardee: In addition to vehicle applications, improved permanent magnets should have application to distribution and power transformers, high reactance cores, communications equipment, high-efficiency fractional horsepower motors, large generators, pole pieces, and relays.

* information listed above is at the time of submission.

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