Comparison of short primary linear machines for high speed maglev vehicles

A brief review of analytical techniques for linear induction machines describes both Fourier based techniques and the more recent 3D finite element methods. A discussion of linear induction machine topology then follows in which conventional axial flux machines are contrasted with transverse flux motors. Primary side excited short stator linear synchronous machines are described and the features of a rotating rig to test high speed versions are explained. Some initial test results from this rig are then given together with the results from a Simple analytical method. The paper finishes by comparing two high speed designs contrasting a homopolar synchronous machine with an axial flux linear induction motor.