9 Homopolar Linear Synchronous Motors (H-LSM)
Modeling, Design, and Control
Homopolar linear synchronous motors (H-LSM) are characterized, in general, by a passive long (fixed) variable reluctance (segmented) ferromagnetic secondary and a short primary on board of the vehicle (mover) that contains an iron core, which hosts both dc coils as long as the core and a three-phase ac winding [1–15].
The dc coil(s) produces a homopolar, pulsating, airgap magnetic field, which is used for controlled electromagnetic suspension of the vehicle; its 2p pole fundamental ac component interacts with the 2p pole three-phase ac winding to produce propulsion (braking) force. Thus, H-LSM potentially provides integrated suspension and propulsion functions for the ...
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