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首页> 外文期刊>Proceedings of the IEE - Part C: Monographs >The measurement and prediction of induction motor stray loss at large slips
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The measurement and prediction of induction motor stray loss at large slips

机译：大转差率感应电动机杂散损耗的测量与预测

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摘要

It is shown that the stray loss in induction motors, at fractional slips greater than about 0.25, is almost entirely due to tooth ripple in the zigzag leakage flux. The stray loss is large; it can double the torque at a slip of 2.0 and can lead to serious errors when calculating accelerating and braking performance. In the normal operating range, i.e. slip less than 0.05, although the stray loss is much lower it is still appreciable, and the component associated with tooth ripple in the main flux is of importance. Experimental evidence, both from actual machines and from high-frequency loss in samples of laminations, indicates that the zigzag leakage flux component of the loss is approximately proportional to (speed)1.6 and (current)1.9, and the results of the American Standard reverse-rotation test extrapolated according to this law are sufficient, together with the no-load stray loss, to predict the total stray loss over the whole practicable speed range. A simple method for calculating the stray loss is given and its limitations are indicated. Calculated values of the loss are compared with the measured losses, but no definite conclusions as to the accuracy of the calculations can be drawn until more is known of the highfrequency loss in machine laminations.
机译：结果表明，在感应电动机中，分数转差大于0.25时的杂散损耗几乎完全是由于锯齿形漏磁通中的齿纹引起的。杂散损耗大；它会在2.0的转差率下使扭矩翻倍，并且在计算加速和制动性能时会导致严重的错误。在正常工作范围内，即滑差小于0.05，尽管杂散损耗要低得多，但仍然很明显，并且与主磁通中的齿纹有关的分量很重要。来自实际机器和叠片样品中的高频损耗的实验证据表明，损耗的之字形泄漏通量分量大约与（速度）1.6和（电流）1.9成正比，而美国标准的结果相反根据该定律外推的旋转试验以及空载杂散损耗足以预测整个可行速度范围内的总杂散损耗。给出了一种计算杂散损耗的简单方法，并指出了其局限性。将损耗的计算值与测得的损耗进行了比较，但是直到人们对机械叠片中的高频损耗有了更多了解之前，才能得出关于计算精度的明确结论。

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