The preliminary design for high speed ground levitation vehicle - Single side short secondary - Computer aided calculation for the optimal impedance and active force

Recently, the research and design of high-speed ground levitation vehicles are very attractive in the modem industrial country. Theoretically, it can´t be denied that the cruising speed is higher than 1000 km/hr, but it must be decided by the land size whether the high speed is necessary or not. According to the mechanic strength and dynamics theory, it´s impossible that utilizing wheels as speed driving mechanism. This paper has a keypoint to the effect of high speed levitation and utilizes the electromagnetic force which is called as traveling force or levitation force to keep the air gap between rail and vehicle constant. Nowadays, the levitation effect is only built up in theory but in practice which being researched is only the rotary in laboratory-the levitation effect depends on the aid of centrifugal force. The main reason why the research of levitation vehicle has still not succeeded is the weight factor. It´s important that how to decrease the weight of vehicle and generated the allowable driving force and levitation force what this paper described above. According to this condition, how to select the material and decided the size etc. of linear motor are also the kernel of this paper. Keeping the flux density constant to calculate all kinds force and find the optimal value of slip. Double side active armature linear motor [13] which has been proposed in the Engineering. Proceeding Vol. 54 No. 11, is the design I, the other one in Vol. 55, No. 11 [14] is the design II. The preliminary design of this paper is the design III.