In high-speed ground transport linear synchronous motors are used to create a traction force. Advantages of linear synchronous motors are precise control of traction force (does not depend on friction forces) and lack of wearing parts.

Linear synchronous motors control systems use block diagrams with orientation on rotor flux linkage. In such systems, information about exact position of movable part allows splitting active and reactive components of stator currents and as result independent control of motor traction force and magnetic flux. Errors in determination position can lead to errors in d–q transformation what affect calculations performed in motor model, and impact on traction force. Moreover, information on position of vehicle is also important to ensure traffic safety.

In conventional types of wheeled vehicles for determining speed and position contact probes and tachometers are used. However, in high-speed magnetic levitation transport non-contact sensors is needed. In addition, when creating control system delay in transmission of radio signals from vehicle to ground control unit should be taken into account.

This paper revive methods of speed and location detection for industry and high-speed ground transportation systems with linear synchronous motors. Also, variant of speed and position detection system for freight Maglev was suggested.