The Design Of Permanent Magnet Synchronous Generator Used For Range-extender Of Electric Vehicle

Electric vehicles are the forefront of clean transportation, whose promotion hasimmeasurable significance. Pure electric vehicles have battery technology limitations.In essence, while hybrid vehicles do not essentially decrease the extent to whichvehicles rely on fuel. Range-extended electric vehicles are between two of them,which both improve the mileage of electric vehicles and increase energy alternative tooil to a certain extent. Range extender is auxiliary power unit by the program on pureelectric vehicles, which has small size, high efficiency, high power density, generallycomposed by the engine and generator. Based on the above ideas, This topic issurrounded by electric vehicle range extender and design studies of permanent magnetsynchronous generator, designed a prototype which is in line with extended rangerequires. Besides, permanent magnets structures were optimized.Firstly, this article described the overview and research of the development ofelectric vehicles comprehensively, analyzed different types of advantages anddisadvantages of the current electric vehicles, proposed the need to develop additionalprograms pure electric vehicles.Secondly, this paper stressed the importance of permanent magnet synchronousgenerator as a range extender core component parts, gave a detailed introduction ofthe rotor magnetic circuit structure and operating performance permanent magnetsynchronous generator, investigated the excellence of V-shaped permanent magnetstructure for electric vehicle range extender. This paper calculated the parameter ofExtended-range electric car’s permanent magnet synchronous generator by Mathcad,simultaneously, established its two-dimensional finite element model, analyzed staticmagnetic field and transient, draw the magnetic field lines in Figure permanentmagnet synchronous generator, magnetic map, flux density curve, load EMFwaveforms. This paper verified the reasonableness of the prototype design parametersby field-circuit combination. This paper researched interior permanent magnetsynchronous generator finite element analysis of V-shaped permanent magnet angleand Magnetic Bridge across the width of the magnetic effect on the load EMF byAnsoft, derived flux density curve and load EMF waveform under different angles of permanent magnets after modeling and simulation, used Fourier analysis to solve thewaveform distortion, got the angle between the optimal value of the permanentmagnet under the minimum waveform distortion. On this basis, this paper obtainedthe optimal value of magnetic bridge across the width by the same method.Finally, this paper gave a research and analysis of used car extended-rangeelectric permanent magnet synchronous generator external characteristics and inherentvoltage regulation. This paper gave a quantitative Analysis of the influence of built-inpermanent magnet synchronous generator voltage regulation inherent by thickness ofthe permanent magnet, the number of turns in series per phase armature windingdiameter, pole arc coefficient, gap length and core length with Mathcad. Maintainingpermanent magnet constant volume, this paper researched generous than thepermanent magnet’s impact on permanent magnet synchronous generator voltageregulation inherent by finite element analysis. Meeting the range extenderrequirements for no-load EMF premise, increasing the thickness of the permanentmagnet mention moderately can reduce the inherent permanent magnet synchronousgenerator voltage regulation.