Linear Motor Drives by Permanetent Magnet Poles Mounted on Vehicles

概要

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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 waveforms of the current flowing in the ground coils. They are rectangular with various conduction angles for FFLMs and sinusoidal for LSM. The typical circuit configurations of the FFLMs for 180°-, 120°-, 90°-and 60°- conduction modes are described at first. The magnetic fields caused by the periodical arrangement of permanent magnet pole pairs which are mounted on vehicles are analysed for the respective conduction modes including LSM. Considerations on the economical aspects of both the actuators and the driving circuits are described. The optimum arrangement of the magnet pole pairs is concluded to depend on the current conduction modes. It is also concluded that if the total length of the actuater is given and the higher power is required, 120°- FFLM is most preferable and if the least weight of the vehicle or the most efficient use of the magnets is required for frequent-service traffics, 60°-FFLM is most preferable.
社団法人電気学会の論文
1995-11-20