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An instrument for measurement of induction motor drives based on phasor and modelling techniques

机译：基于相量和建模技术的感应电动机驱动测量仪器

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This paper describes a practical instrument for realtime visualization of the necessary quantities for analysis, diagnosis and investigations of AC machine drives on an oscillographic display. The instrument needs no shaft position or speed sensor, it uses exclusively the acquired stator currents and voltages and provides information, in electrical and visual form, of: stator and rotor flux; torque; reactive power; torque current; flux current; torque angle; and slip frequency. In the present version, the instrument circuitry is based on analogue signal processing techniques. The theoretical basis is a continuous-time machine model defined by a pair of simultaneous complex-coefficient differential equations. A formalization of the various calculation methods for the signal estimation is presented as well as one interpretative computer simulation for the stator current pattern. Practical results obtained with the device when applied to test and measure a real motor drive are presented and some conclusions are drawn. Main fields of application of the calculator include: monitoring systems, control units, research tools for induction motor drives, and test shops.
机译：本文介绍了一种实用的仪器，用于在示波器显示屏上实时可视化分析，诊断和研究交流电机驱动器所需的数量。该仪器不需要轴位置或速度传感器，它仅使用获取的定子电流和电压，并以电气和视觉形式提供以下信息：定子和转子磁通；扭矩;无功功率转矩电流磁通电流扭矩角和滑差频率。在当前版本中，仪器电路基于模拟信号处理技术。理论基础是由一对同时的复系数微分方程定义的连续时间机器模型。给出了用于信号估计的各种计算方法的形式化描述，以及一种针对定子电流模式的解释性计算机仿真。介绍了该设备用于测试和测量实际电动机驱动器时获得的实际结果，并得出了一些结论。计算器的主要应用领域包括：监控系统，控制单元，用于感应电动机驱动器的研究工具和测试车间。

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