Abstract

This paper presents a comparative analysis of the energy consumption of induction and synchronous reluctance electric drives of low rated power used in the water-supply system of a large building. An induction motor (IM) and synchronous reluctance motor (SynRM) were manufactured using the same motor housing. Test results of the variable speed drive employing an IM and SynRM are presented in a wide range of operating modes. The calculation of motor efficiency at points where there is no experimental data is carried out using polynomial interpolation. The influence of the motor type on the losses in a two-stage frequency converter is investigated using analytical and numerical methods. It is shown that despite a number of theoretical assumptions the analytical method used has a relatively small error. In addition, an alternative approach is proposed for determining values of the current and the power factor of the motor that is needed for calculating the losses in the frequency converter. By considering an example of a 1.1-kW drive, it is shown that using an SynRM can significantly reduce the energy consumption of the pump unit as compared to an IM.

中文翻译：

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考虑到变频器中的损耗，对泵机组的感应和同步磁阻驱动器的能耗进行比较评估

摘要

本文对大型建筑物的供水系统中使用的低额定功率感应和同步磁阻电力驱动器的能耗进行了比较分析。感应电动机（IM）和同步磁阻电动机（SynRM）使用相同的电动机外壳制造。采用IM和SynRM的变速驱动器的测试结果显示在多种操作模式下。使用多项式插值法对没有实验数据的点处的电机效率进行计算。使用解析和数值方法研究了电动机类型对两级变频器中的损耗的影响。结果表明，尽管有许多理论上的假设，但所使用的分析方法的误差相对较小。此外，提出了一种替代方法，用于确定计算变频器中的损耗所需的电流和电动机功率因数的值。通过考虑1.1 kW驱动器的示例，可以看出，与IM相比，使用SynRM可以显着降低泵单元的能耗。