High Torque, Direct Drive Electric Motor

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$597,439.00
Award Year:
2011
Program:
SBIR
Phase:
Phase II
Contract:
NNX11CB28C
Award Id:
n/a
Agency Tracking Number:
094263
Solicitation Year:
2009
Solicitation Topic Code:
S5.03
Solicitation Number:
n/a
Small Business Information
VA, Maidens, VA, 23102-2238
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
800224888
Principal Investigator:
Thomas Myrick
Principal Investigator
(804) 240-0814
tom.myrick@gmail.com
Business Contact:
Karron Myrick
Director of Finance&Bus Dev
(804) 239-7221
kmyrick@bearmechanisms.com
Research Institution:
Stub




Abstract
Bear Engineering proposes to advance the development of an innovative high torque, low speed, direct drive motor in order to meet NASA's requirements for such devices. Fundamentally, all electric motors basically work on the same electromagnetic principle: a tangential electromagnetic force attracts the rotor to the stator. Just when the rotor field is closest to the stator field and the electromagnetic attraction is greatest, the power is interrupted and another set of magnetic poles repeats the cycle. Furthermore, the two magnetically attracted elements never make contact, which would otherwise offer the highest force of attraction.The proposed novel motor design, successfully demonstrated at TRL 4 in Phase 1, operates and behaves entirely differently from all other known electric motor designs and is capable of producing incredibly high, direct drive torques at low rotational speeds. Its operational performance is similar to that of a stepper motor with a 1000:1 gearhead attached, but the similarity ends there. The motor is configured such that its length to diameter aspect ratio is opposite that of traditional motors as it has a relatively large diameter and short axial length; this offers all new packaging opportunities. The design also allows for a single, large diameter bearing pair to be used for the motor's output shaft which renders it stiff enough to directly mount the driven elements. The need for additional bearing supports and bearing mounting structure is thus eliminated. By the end of Phase 2, the system will be designed, developed and tested at TRL 6 with Mars environmental conditions.

* information listed above is at the time of submission.

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