Analytical modeling of magnetic field of permanent magnet in surface mounted linear motors based on exact subdomain model method
In the design of permanent magnet synchronous motors,magnetic field analysis and calcu-lation is a very important task.The magnetic field modeling of permanent magnets in surface mounted linear motors has been studied.Firstly,by combining the pseudo period method with the precise sub-domain method,the analytical expression for the magnetic field distribution of the virtual array of permanent magnets under specific pseudo periods was solved.Then,by rendering the pseudo period-virtually infinite,and using the corresponding relationship between Fourier series and Fourier trans-form,the analytical formula of the magnetic field distribution of a single permanent magnetis ob-tained,and its accuracy was verified by using the finite element method simulation.Furthermore,by using the analytical expression for the magnetic field distribution of permanent magnets,the magnetic field distribution of a type of surface mounted linear motor's permanent magnet array analytical ex-pression was derived,achieving accurate characterization of the magnetic field of the surface mounted linear motor.Finally,the accuracy was verified through finite element simulation.
exact subdomain model methodpseudo periodic methodinverse Fourier transform
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