Method for optimizing magnetic suspension permanent magnet planar motor magnetic steel array parameter

Abstract

The invention discloses a method for optimizing the magnetic suspension permanent magnet planar motor magnetic steel array parameter. An average fundamental wave amplitude is used for setting the expected gas flux density, and a mathematic model of the expected gas flux density is set up; average fundamental wave amplitudes on different levels are used for calculating the expected flux density overall average fundamental wave amplitude in an effective magnetic field space height range, and a gas flux density harmonic model is used for calculating the average relative mean square error of the practical flux density and the expected gas flux density; the magnetic steel parameter is determined based on the principle that the expected flux density overall average fundamental wave amplitude should be as large as possible, and the average relative mean square error of the practical flux density should be as small as possible, an optimizing result can effectively restrain higher harmonics, and especially, second harmonics are restrained greatly.

Description

technical field [0001] The invention belongs to the technical field of electric power transmission, and in particular relates to the design and optimization of a magnetic levitation permanent magnet planar motor, and is particularly suitable for the parameter design and optimization of a permanent magnet planar motor using a Halbach magnetic steel array (Halbach magnetic steel array). Background technique [0002] The mover of the moving coil type magnetic levitation permanent magnet planar motor is a coil array, and the stator is a permanent magnet array. The stator permanent magnet array is composed of main magnets and auxiliary magnets in a Halbach arrangement. When working, the corresponding current is fed to the mover coil, and the current interacts with the magnetic field generated by the stator Halbach permanent magnet array to generate the required thrust and torque. generation is particularly important. The air-gap flux density of the Halbach magnet array is three...

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Problems solved by technology

[0003] Aiming at the defect that the stator permanent magnet array of the existing magnetic levitation permanent magnet planar motor has a poor effect of suppressing the second harmonic and the higher harmonic, a method for optimizing the parameters of the magnetic steel array of the magnetic levitation permanent magnet planar motor is proposed, so that the magnetic levitation permanent magnet planar motor It can effectively suppress high-order harmonics, especially for 2nd harmonics.

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