IRON-CORED LINEAR SYNCHRONOUS MACHINES

Iron-cored linear synchronous motors have sufficient promise to justify dynamic testing of the system. Practical comparisons between the homopolar inductor and the heteropolar types are being made on a rotating rig at Aberdeen University, in addition to the heteropolar work at Nottingham University and Brush Electrical Machines. The main points of interest will clearly be the stability of the machines and the entry and exit effects. The adoption of the machines will, however, always depend on what is a system consideration, i.e., whether a linear induction motor with a simple controller is preferred, probably at the expense of reduced motor performance, to a system using a much more complex control method.