Permanent Magnet Motor Steering Gear

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00024-03-C-4127
Agency Tracking Number: N031-0588
Amount: $69,933.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: 2003
Solicitation Topic Code: N03-086
Solicitation Number: 2003.1
Small Business Information
7483 Candlewood Road, Suite E, Hanover, MD, 21076
DUNS: 188955991
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James Chafe
 Mechanical Engineer
 (410) 691-9916
Business Contact
 Peter MacShane
Title: Director Business Develop
Phone: (410) 691-9916
Research Institution
The design of a permanent magnet motor (PMM) steering gear system for a DDG51 class ship is proposed. The system utilizes proven PMM technology developed by Magnet Motors of Starnberg, Germany The proposed design will meet Navy requirements including: maximum torque (583,333 ft-lbs), slew rate (5.5 degrees per second), travel (+/- 35 degrees), shock (grade A 35), and reliability greater than 99.5%. The first phase project will study four alternative designs: a. a large-diameter medium-speed motor mounted coaxially with the rudder stock on the ring of a planetary reduction gear; b. a pair of high speed motors each of which drives a ball screw actuator that replaces existing hydraulic rams, and c. a high-speed motor driving through a high-ratio harmonic drive. d. four high-speed motors driving pinion gears on a large bull gear quadrant All concepts will have a resilient drive element to protect machinery from shock and vibration loads. The design work will occur in an Integrated Product Team environment that invites Navy experts to actively participate through review meetings held at 6-week intervals. The phase I report will contain detailed drawings and supporting engineering calculations for the selected configuration. Modernization of essential Navy equipment for weight saving, greater control and enhanced maintenance.

* information listed above is at the time of submission.

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