Induction machines with two three-phase windings in convertor applications

Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering', Pub Date : 1989-04-11 DOI:10.1109/MELCON.1989.50010

J. Hylander, S. von Zweygbergk

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引用次数: 2

Abstract

A method for reducing the influence of current harmonics in variable-speed drives on electrodynamic torque has been analyzed with experiments and calculations. An 11 kW 380 V induction motor was rewound with two three-phase systems displaced 30 electrical degrees. Measurements were made with quasi-square-wave supply generated by two voltage source inverters. The induction machine was coupled via a torque transducer to a DC machine. The voltage, two phase currents, and the torque were measured with a transient recorder connected to a computer. In the computer the data were processed with a fast Fourier transform program in order to determine the harmonics. Calculations were also made on a transient computer model of the drive. It is shown that, by designing an induction machine with an extra set of three-phase winding, displaced 30 electrical degrees from the ordinary winding, the influence of the 5, 7, 17, 19, . . . current harmonics on the torque is eliminated. Only the 11, 13, 23, 25, . . . harmonics still produce pulsating torques. The drawback is the extra inverter and winding.<>

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在变换器应用中具有两个三相绕组的感应电机

通过实验和计算分析了一种减小无级变速传动中电流谐波对电动转矩影响的方法。一台11千瓦380伏的感应电动机用两个三相系统重新绕绕，两个三相系统位移30度。利用两个电压源逆变器产生的准方波电源进行测量。感应电机通过转矩传感器与直流电机耦合。电压、两相电流和转矩是用连接到计算机上的瞬时记录仪测量的。在计算机上用快速傅里叶变换程序对数据进行处理，以确定谐波。对该驱动器的暂态计算机模型也进行了计算。结果表明，通过在感应电机中增加一组三相绕组，使其与普通绕组位移30个电度，可以使感应电机的5、7、17、19、…消除了转矩上的电流谐波。只有11、13、23、25、…谐波仍然会产生脉动力矩。缺点是额外的逆变器和绕组。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering',

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