Technical Reports

Investigation of Local Commutation as Applied to Linear Synchronous Motors for Use as a Maglev Propulsion System

  • 01
  • May
  • 1995
AUTHOR: R. Wiesman, R. Fontana, B. Gamble, D. Cope, T. Mason, G. Bastarache
KEYWORDS: Distributed Control, Power Transfer, Railroad Technology
ABSTRACT: The Locally Commutated Linear Synchronous Motor (LCLSM) concept was analyzed and demonstrated. Design and analysis of an 8.1 Megawatt propulsion motor for a 100 Mg Maglev vehicle resulted in a LCLSM system capable of generating smooth thrust with non-overlapping individual propulsion coils. Each coil is powered by a dedicated H-bridge inverter operating from a DC bus and controlled by a dedicated microcontroller which communicates to a base station via fiber optic bus. Control systems were designed and analyzed and characteristics including bus harmonics, eddy current generation, control stability, and thrust were determined by analysis and simulation. A1/10th scale experiment utilizing 64 coils and controllers was built which demonstrated the viability of the LCLSM concept. Results of this program indicate that the LCLSM motor design is well suited to Maglev and other transportation applications. Very high efficiency, power factor, reliability, system flexibility, ride quality, and safety can be achieved with the LCLSM. The LCLSM concept has been developed and demonstrated and it is recommended that it be evaluated for economic viability as a propulsion technology for Maglev and related applications.