Optimal design method for medium-high-speed magnetic gear of high-power wind electromagnetic gearbox

Abstract

The invention relates to an optimal design method for a medium-high-speed magnetic gear of a high-power wind electromagnetic gearbox, and belongs to the field of wind power. The medium-high-speed magnetic gear comprises an inner rotor magnetic gear, an outer rotor magnetic gear and a magnetism adjusting ring. An inner rotor radius Rin2, inner and outer rotor permanent magnet thicknesses hin and ho and an adjustable magnet thickness hs are selected as design variables to be optimized, an output torque ripple Trip and a permanent magnet torque density D of a middle-high speed magnetic gear are taken as optimization targets, a quadratic regression model of the optimization targets and the design variables to be optimized is established based on a response surface experiment, an optimization design problem is converted into a single-target nonlinear programming problem, and a genetic algorithm is adopted to obtain a group of optimal design variables, so that Trip and D are optimal. According to the method, the number of finite element experiments can be reduced, the design efficiency of the medium-high-speed magnetic gear is greatly improved, the unique optimal design parameter combination can be generated, and the purposes of reducing cost and improving performance are achieved.

Description

technical field [0001] The invention relates to an optimal design method of a wind power gearbox, in particular to an optimal design method of a medium-high speed magnetic gear of a high-power wind electromagnetic gearbox, and belongs to the technical field of wind power generation. Background technique [0002] As one of the key components of doubly-fed wind turbines and semi-direct drive wind turbines, wind power gearboxes play an important role in the power transmission process of wind power systems. However, the existing gearbox uses mechanical gear meshing, which requires a complex oil injection lubrication system, which is large in size, heavy, high in cost, loud in noise, high in failure rate, and requires regular maintenance; once a failure occurs, the maintenance cost is high and the downtime is long. to huge economic losses. [0003] As a new type of transmission, magnetic gear has the advantages of no wear, no maintenance, no noise, no lubrication, and overload p...

AI Technical Summary

Problems solved by technology

However, there are problems of inconsistency in dimension and large difference in order of magnitude among various objectives, which brings difficulties to the selection of weight coefficients and also causes poor robustness of single-objective optimization problems.

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