Research Of Multi-objective Optimal Design Of Linear Induction Motors Based On Kriging

The rail transportation vehicle adopting the linear motor traction technology has the characteristics of small turning radius,good traction performance,strong climbing ability,low vibration,low noise,etc.Currently,it has received more and more attention,and many countries have begun to study the development of linear motor rail transportation.The design of the linear motor plays a crucial role in the running performance of the vehicle.The requirements for motor design for vehicles using linear motor traction can be attributed to the following: large motor traction,high energy efficiency,lighter weight,smaller size,and high efficiency.The motor optimization design technology is an effective means to improve motor performance and design efficiency,but at present the role played in the design of linear motors is far from meeting people's expectations.For the linear motor optimization design to obtain good results,two major elements are needed: First,various performance parameters of the linear motor in various states must be able to be calculated more quickly and accurately;secondly,the optimization method must be able to fully search the huge design space which also be able to obtain a globally optimal solution or a globally optimal and satisfactory optimal solution with less computational cost.In this paper,the characteristic parameters of the linear induction motor T-type equivalent circuit based on field-path combined derivation considering end effect and “half-filled groove” are used to calculate the motor characteristic parameters,and a kriging surrogate model with strong processing ability for complex and multi-dimensional and nonlinear coupling relations is combined.The optimization method is integrated into the EGO iteration and point-adding strategy.The optimized optimization main program and motor high-low speed characteristic calculation program are compiled on the MATLAB platform.Considering actual application requirements and constraints,the linear application of the linear induction motor for maglev vehicles is considered.The multi-objective optimization design obtains a series of optimal design parameters under the pre-determined constraint conditions.The finite element calculation method is used to verify it's performance,verified the effectiveness and practicality of the optimization work.