Sensorless Control of Linear Motors

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00178-04-C-3041
Agency Tracking Number: N022-1251
Amount: $597,567.00
Phase: Phase II
Program: SBIR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
36 western Industrial Drive, Cranston, RI, 02921
DUNS: 080810187
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Raymond Sepe
 Vice President R&D
 (401) 943-1164
Business Contact
 Raymond Sepe
Title: Vice President R&D
Phone: (401) 943-1164
Research Institution
Sensorless linear motor control addresses the market need for cost effective and more reliable control of electric motors by removing the mechanical sensors from the feedback control system. The mechanical sensors are the weakest link in the controlsystem in terms of reliability and parts and maintenance costs, especially in demanding environments. For linear motors in particular, the position sensors are problematic since maintaining good resolution over long travel distances is both costly andphysically challenging. Previous work on sensorless control has focused on rotary motors yet still has not adequately addressed applications requiring wide speed range and repetitive transient operation. Little work has been done on linear motors whichpresent additional challenges due to nonlinear end effects. This program will mature sensorless controller technology to meet the operating demands of EMALS while developing enabling sensorless controller technology applicable to both rotary and linearmotor systems. Simulation and experimental techniques will be systematically applied to develop sensorless linear motor control that addresses transient performance, wide speed operating ranges, and changing external loads typical of an EMALS aircraftlaunch. Effective sensorless control technology for rotary and linear motors would benefit large volume markets such as automotive by reducing the cost of electric motors in vehicles and reducing maintenance costs. Demanding application evironments suchas those encountered in military or aviation industry would benefit by reducing system failure rates, thereby saving in costs and providing a competitive edge in performance.

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

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