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武汉船用电力推进装置研究所 430064
[ 摘要 ] 现代船舶多采用电力推进作为其动力系统,而交流永磁推进是船舶动力系统的一个新的发展方向。本文采用有限元法,在船舶永磁推进电机电磁场分析计算的基础上,运用场——路结合方法进行电磁设计计算,可得到电机的内部磁场分布波形、绕组反电势、电机电感和电磁转矩等重要电磁参数,从而验证电机结构参数的合理性,并且能够计算出推进电机各种运行工况下的特性。本文利用电机的周期性和齿槽结构的重复性,采用简化计算的方法即只计算一个槽距范围,对得到的结果数据进行数据扩展,得到电机转子转过一对磁极范围的数据,可使计算速度提高几十倍。在计算中同时考虑了电枢斜槽,硅钢片叠压系数,硅钢片磁导率各向异性等因素的影响。用上述计算方法设计计算了兆瓦级船舶交流永磁推进电机,各种参数计算值与实验结果相比基本相符,能够满足设计的精度要求。
[ 关键词 ] 反电势电感 叠压系数磁导率各项异性
Electromagnetic Field Calculation of AC PM Propulsive Motor of Ships
Wu haiying
CISC 712 ,430064
[ Abstract ] In recent years the designers adopt the electric-drive as their ships power system. However, the AC permanent magnet(PM) propulsion motor is a new developing trend of the ships power system. On the basis of the electromagnet field analysis and calculation of the PM motor, we use the finite element method and field—current conjugation for EM field design to get the parameters such as magnetic field waveform, winding EMF, self-inductance, mutual-inductance and EM torque, etc. So that we could confirm structure parameter of the motor ,then calculate the perform characteristic of propulsive motor under every operating mode. We use the periodicity of motor and the repeatability of the tooth space structure, adopts a simplified calculation of calculating just one slot pitch, and extending the data, then getting the data that the rotor rotates a pair of magnetic poles, and it makes the speed of calculation improve multi-times. Consider the influence of the armature chute, silicon sheet lamination-stacking parameter, silicon sheet magnetic inductivity anisotropy, etc. at the same time. We have designed the megawatt AC PM propulsion motor of the ships, the calculated result of the parameters is up to the experimental result basically.
[ Keyword ] EMF inductance silicon sheet lamination-stacking magnetic inductivity anisotropy |
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