Study on Optimum Design of Linear Motor for Urban Transit

城市交通直线电机优化设计研究

• 批准号: 60420032
• 负责人: NONAKA Sakutaro
• 金额: $ 22.27万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60420032/
• 关键词: Linear Motor; Linear Induction Motor; Urban Transit System; Electric Railroad; Low Din Railroad; Induction Motor; 電気機械

Arch type test facility with the cylindrical rotor of single-sided linear induction motor (SLIM, 3-phase, 4-poles, 100kVA) was designed and constructed as the propulsion system for a ne urban transit. The test SLIM is driven by a pulse-width-modulate inverter (PWM Inverter, 3-phase, 150kVA, 1-50Hz, 40-440V). From the comparison between the measured results and calculated results, it was found as follows:1. As the SLIM which is installed for the purpose of the above operates with the low speed 40-50km/h and requires the large mechanical clearance over 10mm for the safety drive, the thrust decreases as the slip decreases under the constant voltage operation in any supply frequency.2. In the speed control with a constant ratio of the supply voltage and the frequency, the larger voltage is required to accelerate the motor speed constantly in the low frequency, compared with that in the conventional rotating induction motor, because of the large voltage drop by the large primary impedance.3. The flux density in the air gap is weakened at the entry end and considerably strengthened at the exit end in the small-slip region even in the low-speed SLIM, because of the end effect. As the large vertical force (attractive force) produces at the exit end of the motor, which makes the effective weight of the vehicle increase in the practical case, the method of reducing the vertical force is required.4. A study has been made on the design of the SLIMs for the urban transit with the maximum speed of 70km/h. The outline of SLIM design is given as follows: The primary core should be designed long, narrow and thin. The motor length of approximately 2.5m would be appropriate for about 40km/h SLIMs. The pole pitch is one of the most important dimensions also. The suitable value will be about 300mm. The flux density should be selected in relatively low value from 0.4T to 0.5T in order to decrease the vertical force as well as the magnetizing current.

设计并建造了采用单边直线感应电机（SLIM，3相，4极，100 kVA）圆柱形转子的拱形试验装置，作为新城市轨道交通的推进系统。测试SLIM由脉宽调制逆变器（PWM逆变器，3相，1- 50 kVA，1- 50 Hz，40- 440 V）驱动。通过实测结果与计算结果的对比，得出以下结论：1.由于SLIM是以40- 50 km/h的低速运行，并且需要大于10 mm的大机械间隙用于安全驱动，因此在任何供电频率下，在恒压运行下，推力随着滑差的减小而减小。在电源电压与频率之比恒定的速度控制中，与传统的旋转感应电动机相比，由于大的初级阻抗导致大的电压降，因此需要更大的电压来使电动机在低频下恒定地加速.由于端部效应的影响，即使在低速SLIM中，在小转差率区，气隙中的磁通密度在入口端减弱，而在出口端显著增强。由于电机出口端产生较大的垂直力（吸引力），在实际情况下会使车辆的有效重量增加，因此需要减小垂直力的方法.对最高车速为70 km/h的城市轨道交通SLIM的设计进行了研究。直线感应电机的设计要点如下：一次铁芯应设计成细长形。大约2.5m的电机长度将适合于大约40 km/h的SLIM。极距也是最重要的尺寸之一。合适的值为300 mm左右。为了减小垂直力和磁化电流，磁密应选择在0.4 ~ 0.5T的较低值。

项目成果

Sakutaro Nonaka: "On the Determination of Optimized Design Parameters of The Single-sided LIM Using a SUMT Technique" Report of the Studying Committee on Magnetics. MAG-85. 1-10 (1985)

Sakutaro Nonaka：“关于使用 SUMT 技术确定单面 LIM 的优化设计参数”磁学研究委员会的报告。

Sakutaro Nonaka: "Performance of Long Linear Induction Motors Divided into Several Stators Connecting in Series" Proceedings of International Conference on Electrical Machines. 156-159 (1986)

野中作太郎：“分成串联的多个定子的长线性感应电机的性能”国际电机会议论文集。

野中作太郎: 電気学会マグネティックス研究会資料. MAG-86. 13-22 (1986)

Sakutaro Nonaka：IEEJ 磁学研究组材料。13-22 (1986)

Sakutaro Nonaka: "Analysis of Linear Induction Motors Using a Simplified Space Harmonic Technique" Proceeding of International Conference on MAGLEV and LINEAR DRIVES. 179-186 (1986)

Sakutaro Nonaka：“使用简化空间谐波技术分析线性感应电机”磁悬浮和线性驱动国际会议论文集。

Sakutaro Nonaka: "Performance of a Divided-stator Type Linear Induction Motor with Series Connection" Report of the Studying Committee on Magnetics. MAG-86. 81-90 (1986)

野中作太郎：“串联连接的分定子型直线感应电机的性能”磁学研究委员会的报告。