长初级双边直线感应电机推力输出研究

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摘要研究目的:以麦克斯韦微分方程组为基础，结合直线感应电机T型等值电路，分析研究双边直线感应电机在考虑边端效应情况下的电磁推力输出，同时采用有限元计算方法，仿真验证理论计算有效性。计算推导双边直线感应电机数学表达式，并通过具体设计参数建立电机仿真模型，实验分析不同因素下滑差频率控制推力输出，通过对电磁推力输出特性分析研究，实现恒电流滑差频率优化控制。研究结论:(1)通过双边直线感应电机数学模型及等效电路计算各种机械特性，并推导横向和纵向边端效应修正系数，电机高速运动时，边端效应对电磁推力输出影响小；(2)采用电磁场有限元工具软件，建立双边直线感应电机仿真模型，将理论计算与仿真数据进行多次对比分析，理论计算与仿真结果基本吻合，保证数学模型有效性；(3)仿真分析滑差频率、运行速度、气隙，以及动子长度对电磁推力输出的影响，对于不同的运行速率，适当调节滑差频率，可增大电磁推力输出，低速最优滑差值为2 Hz附近，高速最优滑差频率区间为4.0~6.0 Hz，在满足电机在额定条件下，可实现电磁推力最优化控制；(4)双边直线感应电机的分析研究结果对航母舰载机电磁发射系统具有重要指导意义。

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	张昆仑
	刘希军
	张文龙

关键词 ：双边直线感应电机, 边端效应, 滑差频率, 电磁推力

Abstract：Research purposes:Based on Maxwell equations and T-type equivalent circuit of linear induction motor, we analyze the electromagnetic thrust output of a double-sided linear induction motor in the case of edge effect, and use the finite element method and simulation to test the effectiveness of the theoretical calculation. We further derivate the mathematical expressions of a double-sided linear induction motor, build the simulation model by parameter design, and experimentally analyze the slip frequency control thrust output in conditions of different operating. Through analysis of the output characteristics of the electromagnetic force, optimal control of constant current slip frequency is achieved.Research conclusions:(1) We calculate various mechanical properties of a bilateral linear induction motor through its mathematical model and equivalent circuit, and derive the corrected coefficients of the horizontal and vertical edge effect. When the motor runs at a high speed, the edge effect has little influence on the output of the electromagnetic force. (2) We use the finite element computer software to establish the simulation model of a bilateral linear induction motor, and compare the theoretical calculation and simulation data: the simulation results are consistent with theoretical calculation, thus ensuring the validity of the mathematical model. (3) We simulate and analyze the influence of slip frequency, speed, suspension air gap, and length of the mover on electromagnetic force. At different speeds, properly adjusting the slip frequency can increase the output of electromagnetic force. For low speed, the optimal slip frequency is near 2 Hz; for high speed, the optimal slip frequency is between 4.0 Hz and 6.0 Hz. When satisfying the motor′s rated condition, the optimal control of electromagnetic force is achieved. (4) The research result of double-sided linear induction motor can provide important implications for the electromagnetic launch system of an aircraft carrier.

Key words： double-sided linear induction motor edge effect slip frequency electromagnetic thrust

收稿日期: 2014-03-10

PACS:

TM359.4

基金资助:教育部重点实验室建设项目(2682013ZT18)

作者简介: 张昆仑，1964年出生，男，教授，博士生导师。

引用本文:

张昆仑，刘希军，张文龙. 长初级双边直线感应电机推力输出研究[J]. 铁道工程, 2014, 31(9): 102-107.
ZHANG Kun-lun,LIU Xi-jun, ZHANG Wen-long. Research on the Thrust Output of a Long Primary Double-sided Linear Induction Motor. 铁道工程, 2014, 31(9): 102-107.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2014/V31/I9/102

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