Torque ripple reduction methods for vector controlled induction motor with current preview control

15th Annual Conference of IEEE Industrial Electronics Society Pub Date : 1989-11-06 DOI:10.1109/IECON.1989.69633

T. Koga, I. Miyashita, A. Matsumoto, Y. Okada

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引用次数: 2

Abstract

The authors describe a method for direct high-speed control of the secondary magnetic flux and torque of an induction motor supplied with power via a transistor inverter. The control system is totally digitized using digital signal processing. Since operation time leads to control delay in such a system, the random-frequency torque ripples involved are more significant than with conventional PWM (pulse-width modulation) techniques. This difficulty is relieved considerably by using current preview control. Two methods for further improvement are proposed. The usefulness of these techniques is demonstrated by showing the results of a simulation, and results of measurements on a 7.5 kW induction motor are presented. In particular, when the motor velocity is zero (rotor locked), the motor produces torque ripples with twice the inverter frequency, which are believed to be due to imbalance of the motor magnetic circuit. These torque ripples are generated in nearly equal quantities when conventional PWM is used and when a low-frequency sine wave power supply is used.<>

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带电流预览控制的矢量控制异步电动机转矩脉动减小方法

介绍了一种通过晶体管逆变器直接高速控制感应电动机二次磁通和转矩的方法。控制系统采用数字信号处理，完全数字化。由于这种系统的操作时间会导致控制延迟，因此所涉及的随机频率转矩波动比传统的PWM(脉宽调制)技术更显著。通过使用当前预览控制，这一困难大大缓解。提出了进一步改进的两种方法。这些技术的有用性通过显示仿真结果来证明，并给出了7.5 kW感应电动机的测量结果。特别是，当电机速度为零(转子锁定)时，电机产生的转矩波纹是逆变器频率的两倍，这被认为是由于电机磁路不平衡造成的。当使用传统PWM和使用低频正弦波电源时，这些转矩波纹几乎相等。

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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15th Annual Conference of IEEE Industrial Electronics Society

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