CONFIRMATION OF THE MATHEMATICAL MODEL ADEQUACY OF A LINEAR SYNCHRONOUS MOTOR

V. F. Novikov

Abstract


Purpose.To reduce labor costs and the amount of computer time in the design of linear synchronous motors with excitation from a source of a constant magnetic field of high-speed ground transportation it is necessary to use engineering methods. The purpose of this study is to confirm the adequacy of the previously proposed mathematical model of this engine and assumptions. It is also intended to confirm the possibility of applying the method of calculation of traction that occurs in the engine in the interaction of the permanent magnetic field of the excitation system of a vehicle with a coil track structure.Methodology. As for empirical theories the positive result of the experiment is not absolute proof of the truth, for an unambiguous conclusion about the adequacy of the developed model and the effectiveness of the developed methods need to be tested for falsification. In accordance with this criterion, it is necessary to conduct an experiment, the results of which will coincide with the calculation but you also need to avoid errors caused by random coincidences. For this purpose the experiments with varying parameters are conducted. Findings. In a critical experiment configuration changes of the excitation system were held so that the shape dependence of traction from displacement is differed significantly. The comparison of the results of the calculated and experimental values of traction for different configurations showed that the differences are minor and easily explained by measurement error and uneven gaps between the poles and excitation coils of the track structure. Originality. The adequacy of the mathematical model of a linear synchronous motor without a ferromagnetic magnetic circuit and the assumptions and applicability of the calculation method of traction forces involved in it, at the interaction of a permanent magnetic field of the excitation system of a vehicle with a coil track structure were proved. This proof is built on conducting a critical experiment by comparing the calculated and experimentally obtained values of the magnitude of traction for different structures of the linear synchronous motor. Practical value. The adequacy of the mathematical model of a linear synchronous motor of high-speed transport with the excitation of the DC magnetic field and the accepted assumptions is proved in this paper. The author also proved the applicability of the method of calculation of traction that occurs in it, the interaction of static magnetic field of the excitation system of a vehicle with a coil track structure. The use of this technique will reduce the amount of labor and machine time for the design of linear synchronous motors from the DC magnetic field of high-speed ground transportation.


Keywords


high-speed ground transportation; linear synchronous motor; Popper's criterion; critical experiment; permanent magnet

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DOI: https://doi.org/10.15802/stp2015/46055

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