Design And Optimization Of A Double Stator Flux Switching Hydroelectric Generatr

With the increasing demand for clean energy,small hydroelectric generators come into everyone’s field of vision,and small hydroelectric generators can be applied to small reservoirs,low water heads and underwater intelligent robots,which requires them to ensure small size while ensuring low torque and high efficiency.Permanent magnet synchronous generator is mostly used with hydroelectric generator,and the paper focuses on a single-phase dual stator flux switching hydroelectric generator（DS-FSPM generator）for research and optimization analysis.The research content of the thesis includes the following aspects:First of all,the paper introduces the structural design of permanent magnet synchronous generator,especially the research status of double stator generator and flux switching motor,and then introduces the special structure of DS-FSPM generator,because permanent magnet synchronous generator and DS-FSPM generator have commonalities,can be combined with the operation principle of permanent magnet synchronous generator and flux switching principle to explain the working principle of DS-FSPM generator,and derive the mathematical model of DS-FSPM generator on this basis.Then,the electromagnetic design and calculation of the main parameters of the DS-FSPM generator are introduced,in terms of electromagnetic design,this paper adopts the equivalent magnetic circuit method,through the characteristics of the permanent magnet synchronous generator,the determination of the main size of the DS-FSPM generator,the selection of electromagnetic load,the selection basis of the permanent magnet material is analyzed in detail,and the parameters and overall structure of the generator are obtained,which paves the way for the later parameter optimization and structural optimization.Finally,aiming at the cogging torque problem of DS-FSPM generator,an optimization method for cogging torque of DS-FSPM generator is proposed.One of the optimization methods is to introduce the optimization steps according to the actual generator optimization problems through the basic principles and operation process of the genetic algorithm,the selection of optimization targets and optimization variables,and the constraints of the constraints,and then show the rationality of the method through finite element simulation.In addition,the cogging torque is reduced by the structure of the rotor pole shoe,and the optimized DS-FSPM generator is finally obtained.Based on this,comparing the magnetic field distribution,air gap magnetic density,no-load back potential and load torque of the optimized DS-FSPM generator and the optimized DS-FSPM generator,the optimized DS-FSPM generator is more in line with the expectations after comprehensive consideration of these performance characteristics.