交通用大功率直线异步电动机牵引特性  

Tractive Characteristics Analysis for High Power Linear Induction Motors in Transportation

作　　者：徐伟[1] 李耀华[1] 孙广生[1] 何晋伟[1] 杜玉梅[1] 谈龙成[1] 任晋旗[1] 王珂[1] 韩俊飞[1] 金能强[1] 

机构地区：[1]中国科学院电工研究所

出　　处：《电工技术学报》2008年第7期14-20,共7页Transactions of China Electrotechnical Society

摘　　要：从直线异步电动机二维电磁场角度入手,采用虚拟电动势法求出相电流和励磁电压表达式,接着把Maxwell电磁场方程、复功率法、保角变换法结合起来,充分考虑端部半填充槽、铁轭磁饱和、次级背铁电阻的影响,对气隙磁链方程进行推导。利用场路复量功率相等关系,本文分别求解出励磁电抗xm0、次级等效电阻r′2、次级漏抗x2、纵向边缘效应校正系数Kr(s)和Kx(s)、横向边端效应校正系数Cr(s)和Cx(s)、集肤效应校正系数Kf。在旋转异步电机T型模型基础上,利用叠加原理,本文提出一种改进的直线电动机T型等效模型。用该模型对日本12000型直线异步电动机牵引特性进行了详细分析,将其中推力、相电流、功率因数、效率变化量与日本著名学者Nonaka的空间谐波法和电机特性试验数据进行比较。结果表明,该模型真实可信,较好地满足工程应用要求,对交通用大功率直线异步电动机的设计和优化奠定了基础,具有较好的参考价值。Based on two-dimensional magnetic equations of linear induction motors（LIM）, the phase current and excited voltage expressions are obtained by dummy electric potential method. Then it deduces the air-gap flux linkage expression by connecting Maxwell electromagnetic field equations, complex power method with conformal transformation method fully considering half-filled slots, york magnetic saturation, back iron resistance. This article, by the equal complex power relationship between magnetic and circuit, obtains some expressions involving excited reactance Xm0, secondary resistance r2＇, secondary leakage reactance x2 longitudinal end effect coefficients Kr（s） and Kx（s）, transverse end edge effect coefficients Cr（s） and Cx（s）, skin effect coefficient Kf. Depending on the T-model of rotary induction motor（RIM）, this paper presents a new revised T-model equivalent circuit for LIM by superposition theorem. This new model makes calculation for Japanese 12000-LIM in detail. Many variables attained by new model including thrust force, phase current, power factor and efficiency are compared with those of space harmonic method and experience. The contrastive curves and error analysis indicate that this model is credible and accords with engineering application requirement. Therefore, it is so useful that establishes foundation for design and optimization for high-power LIM in transportation.

关 键 词：直线异步电动机 特性分析 等效电路 边缘效应 集肤效应 涡流 

分 类 号：TM359.4[电气工程—电机] U262.013.1[机械工程—车辆工程]