Design And Analysis Of Off-grid Permanent Magnet Synchronous Wind Generator

With the realization of the seriousness of environmental pollution problem,more and more attention has been paid to the development and utilization of new energy resources.Off-grid wind power is an important part of new energy.Off-grid low-power permanent magnet synchronous wind generator can be widely used in road lamps,electric fishing boats and remote island power supply and so on.In this paper,the bulk design of off-grid permanent magnet synchronous wind generator(PMSG)is studied,and the prototype processing and some experimental tests are completed.In this paper,the bulk design of off-grid permanent magnet synchronous wind generator(PMSG)is studied,the prototype processing and some experimental tests are completed.Firstly,the basic characteristics and structure classification of permanent magnet synchronous wind generator are introduced.The equivalent magnetic circuit model of PMSG is deduced,and some parameter calculation and operation characteristics of the generator are introduced briefly,which lays a theoretical foundation for the following generator design.Secondly,the operation characteristics and design requirements of off-grid permanent magnet synchronous wind generator are analyzed,and an off-grid permanent magnet synchronous wind generator with rated power of 300 W is designed by means of field-circuit coupling.The electromagnetic design scheme of generator is determined by using the electromagnetic design software ANSYS-RMxprt based on magnetic circuit method.The finite element model of generator is established by ANSYS Maxwell,and the static and transient characteristics of thegenerator are analyzed.At the same time,the efficiency performance of the generator is checked based on the loss of each part of the generator.The above analysis shows the rationality and effectiveness of the generator design.In order to start the generator well under low wind speed,the starting resistance moment of the generator is optimized.The cogging torque of generator is optimized by combining armature parameters with pole parameters optimization.By studying the influence of different parameters of generator on cogging torque,the optimal response surface model of generator is constructed.The particle swarm optimization with compression factor is compiled in MATLAB to get the optimal parameter combination.Finite element analysis of generator parameters shows that the cogging torque is greatly reduced compared with that of before optimization.Then,on the basis of the theory of heat transfer,the generator loss obtained by electromagnetic analysis is used as the distributed heat source,and the magneto-thermal coupling analysis is carried out by using the finite element software ANSYS Maxwell and ANSYS Workbench.The temperature law of the generator at static state is obtained.The simulation results show the heat distribution inside the generator during operation.The rationality of generator design is verified.Finally,according to the electromagnetic parameters of the generator,a prototype is manufactured and some experimental research is completed.