LINEAR SYNCHRONOUS UNIPOLAR MOTOR (LSUM) DEVELOPMENT REPORT

The development and test of an Integrated Magnetic Propulsion and Suspension motor is described. The machine, designated as a Linear Synchronous Unipolar Motor (LSUM), utilizes rare earth permanent magnets to supply its magnetic field, giving primary suspension for a transit vehicle without significant energy consumption. The properties of the synchronous motor allow better utilization of the vehicle power conditioning equipment by obtaining a higher power factor and efficiency product than possible with the linear induction motor. The LSUM was tested and evaluated in a static test facility. A complete documentation of life and thrust performance over the full range of a vehicle operating scenario, and a description of magnetic flux in and around the machine were obtained. The concept of supplying the unipolar magnetic field with rare earth magnets, and boosting that field with D.C. coils for lift control was proven during the test. The motor showed its potential for use in an automated public transportation system, particularly those systems that are characterized by a relative low ratio of thrust to lift.

• Corporate Authors:

  Boeing Aerospace Company

  Automated Transportation Systems, P.O. Box 3999
  Seattle, WA  United States  98124

  Urban Mass Transportation Administration

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Gilliland, R G
  • Pearson, G W
• Publication Date: 1986-10

Media Info

• Pagination: 232 p.

Subject/Index Terms

• TRT Terms: Automated guideway transit; Linear motors; Magnetic levitation; Permanent magnets; Propulsion; Synchronous motors; Vehicle power plants
• Identifier Terms: Urban Mass Transportation Act
• Uncontrolled Terms: Propulsion systems
• Old TRIS Terms: Umta section 6
• Subject Areas: Operations and Traffic Management; Public Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00468883
• Record Type: Publication
• Report/Paper Numbers: UMTA-WA-06-0014-86-1
• Contract Numbers: DTUM60-80-C-71009
• Files: TRIS, USDOT
• Created Date: May 31 1988 12:00AM