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新型双转子双定子永磁同步发电机的磁场及耦合效应分析

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为了解决目前海上风力发电机存在的成本高、体积大等问题,提出一种新型双转子双定子永磁同步发电机(DRDS-PMSG).建立了发电机的等效磁路模型,采用有限元分析方法评估了发电机的电磁特性及内外电机的耦合效应,部分仿真结果得到了实验验证.仿真结果表明:随着内、外永磁体相对位置的改变,电机等效磁路存在3种典型情况,并可通过耦合系数对耦合区域的等效磁阻进行描述;内、外电机的耦合效应体现在齿槽转矩、电磁转矩等电磁特性上,内、外电机的齿槽转矩峰峰值分别为0.52和1.64 kN·m,电磁转矩平均值分别为11.65和27.09 kN·m,转矩脉动分别为6.02％和4.12％;总体来看,内、外电机之间存在一定程度的耦合,但该耦合效应被隔磁环有效削弱.
Magnetic field and coupling effect analysis of a novel dual-rotor dual-stator permanent magnet synchronous generator
To tackle the issue of high cost and large volume for offshore wind power generators,a novel dual-rotor dual-stator permanent magnet synchronous generator(DRDS-PMSG)is proposed.The equivalent magnetic circuit model of the generator is established,finite element analysis is performed to evaluate the electromagnetic characteristics and coupling effect,and some simulation results are verified through experiment.The simulation analysis results show that three typical equivalent magnetic circuits exist with changed relative positions between the inner and outer magnets,and the equivalent reluctance of the coupling region can be described using a coupling coefficient.The coupling effect of inner and outer machines is revealed by electromagnetic characteristics,including cogging torque and electromagnetic torque.The peak-to-peak values of the cogging torque of inner and outer machines are 0.52 and 1.64 kN·m,the average values of electromagnetic torque are 11.65 and 27.09 kN·m,and the torque ripples are 6.02％and 4.12％,respectively.In general,a coupling effect exists between the inner and outer machines;however,the coupling effect is effectively reduced by the flux barrier.

dual-rotor dual-stator(DRDS)electromagnetic characteristicspermanent magnet synchronous generator(PMSG)magnetic fieldfinite element analysiscoupling effect

付明志、秦猛、郭小江、陈雨菡、林鹤云

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华能清洁能源技术研究院,北京 100032

东南大学电气工程学院,南京 210096

双转子双定子 电磁特性 永磁同步发电机 磁场 有限元分析 耦合效应

National Key Research and Development Plan of China

2020YFB1506603

2024

10.3969/j.issn.1003-7985.2024.01.010

东南大学学报(英文版)
东南大学

东南大学学报(英文版)

影响因子：0.211
ISSN：1003-7985
年,卷(期)：2024.40(1)
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