Various kinds of the flip-flop linear motors (FFLM) are discussed in comparison with the usual linear synchronous motors (LSM), from the view point of propulsive efficiency. The essential difference of them exists in the wave forms of the current flowing in the ground coils. They are rectangular with various conduction angles for FFLM's and sinusoidal for LSM. The typical circuit configurations of the FFLM's for 180, 120, 90 and 60 degree conduction modes are described. The magnetic fields caused by the periodical arrangement of permanent magnet pairs which are assumed to be mounted on vehicles are analysed for the respective conduction modes including LSM. The considerations on the economical aspects of both the actuators and the driving circuits are described. The optimum arrangement of the magnet pairs is concluded to depend on the current conduction modes. It is also concluded that if the total length of the actuator is given and the higher power is required, 120 degree FFLM is preferable and if the least weight of the vehicle or the most efficient use of the magnets is required, 60 degree FFLM is preferable particulary for high frequency traffics.
Basic considerations on the linear motor drive by permanent magnet poles mounted on vehicles
Linearmotor-Fahrzeugantriebe mit Dauermagnetpol
PESC, Annual Power Electronics Specialists Conf, 25 ; 25,2 ; 992-997
1994
6 Seiten, 6 Bilder, 1 Tabelle, 4 Quellen
Aufsatz (Konferenz)
Englisch
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