Accurate analytical calculation of load air-gap magnetic density distribution of non-salient pole rectifier synchronous generator

被引：0
|
作者：
Jiang T. [1 ]
Guo Y. [1 ]
Su W. [1 ]
机构：
[1] National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2023年 / 27卷 / 06期
关键词：
analytical calculation; conformal transformation method; distributed magnetic circuit method; load conditions; non-salient pole rectifier synchronous generator; relative specific permeance function;
D O I：
10.15938/j.emc.2023.06.003
中图分类号：
学科分类号：
摘要：
To solve the analytical calculation of air-gap magnetic field of non-salient pole rectifier synchronous generator, an analytical model of air-gap magnetic field under AC load was established by using distributed magnetic circuit method, considering the influence of magnetic circuit saturation. Using conformal mapping method, the relative specific permeability function of air gap under stator and rotor slots was established, which could consider the cogging effect and winding slot structure. By comparing the analytical results with the finite element simulation results, it shows that the analytical calculation waveform of air gap magnetic density considering the cogging effect being in good agreement with the results obtained by finite element simulation, in which the accuracy of fundamental wave magnetic density amplitude obtained by analytical calculation is higher, and the relative error is less than 1% . Meanwhile, the calculation time of analytical method is only tens of seconds, which realizes the rapid analytical calculation of air gap magnetic density distribution of load compared with the calculation time of finite element method of more than one hour. Thus, the effectiveness and efficiency of the distributed magnetic circuit method in calculating the air gap magnetic field under load condition are verified, which has certain theoretical guiding significance for the precise design of magnetic circuit and electromagnetic performance analysis of this kind of motor. © 2023 Editorial Department of Electric Machines and Control. All rights reserved.
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页码：18 / 25
页数：7
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