Research On The Driving Characteristics Of The Propeller-Propulsion Device’s The Magnetic Suspended Vehicle

Based on the levitation theory of the conventional maglev train, the structure and control of the Magnetic Suspended Vehicle are greatly simplified. Not like the conventional maglev train driven by the linear motor, the Magnetic Suspended Vehicle uses high speed propeller which can not only sharply reduce the cost and difficulty of the control system, but also avoid the coupling influence between the driving magnetic field and the suspending magnetic field as well as reducing the electromagnetic pollution.The new Magnetic Suspended Vehicle System has been improved on the basis of the original Maglev system. The control system, power supply and the structure body of the original Magnetic Suspended Vehicle are separated modules, while the new Magnetic Suspended Vehicle has integrated all those modules into one system. Directly powered by the lithium batteries, the new system eliminated the effects of the power and control cables to the accuracy experimental results. Compared to the original system, a tilt device which can adjust the propulsion angle is added to the new system.Firstly, this paper briefly describes the origin and development history of the maglev train, introduces the classification of conventional maglev train and the domestic and foreign research status related to this thesis. Then states the working principle, integration and tilting device design of the new Magnetic Suspended Vehicle.Secondly, we measured the equivalent friction coefficient, compared to the experimental results of the old system, the results is consistent with the previous research. The equivalent coefficient of friction is in the same order of magnitude, but the results raised due to the ascending control current caused by the increase of the Magnetic Suspended Vehicle’s body weight.Next the static thrust of the propeller under different rotational speed was measured and compared with the computed results of the Abbott formula which is an empirical formula for calculating the static thrust of two blade propeller. After that we tested the drive efficiency of the propeller under different shape of flow baffle and different propulsion angle. The results of the experiment shows that the effects of the arc baffle is better than the flat baffle and when the Magnetic Suspended Vehicle is propelled by a certain angle of the propeller it achieved the best effect to the drive efficiency.Finally, we used fluid simulation software CFX to simulate the propeller’s static thrust under different rotational speed、the driving force under different shape of flow baffle and different propulsion angle, verified the results of the experiments and the simulation data is accurately consistent with the experimental measurements.