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首页> 外文期刊>IEEE Transactions on Magnetics >Experimental Study of Iron Losses Generated by a Uniform Rotating Field
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Experimental Study of Iron Losses Generated by a Uniform Rotating Field

机译：均匀旋转场产生铁损的实验研究

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This paper introduces a mock-up with a solid iron cylinder rotating in a fixed excitation frame powered by dc current. A uniform field is created in the rotating cylinder, which is driven by an external motor. The braking torque is measured, allowing the study of iron losses generated by a uniform rotating field. The aim is to advance toward a vector iron loss model that takes into account different magnetization directions and their interdependency. The eddy current losses are the dominant loss source in the mock-up, rendering it easier to model. A standard eddy currents model is proposed. It models well the losses at low and medium magnetic flux density, but lower losses are measured near saturation levels. This could be due to the high thickness to radius ratio changing the eddy current paths near the edges of the rotor, which can be later analyzed by a full 3-D finite-element method analysis. A 2-D finite-element method simulation is performed, which estimates the magnetic flux heterogeneity in the rotor. Several lessons are drawn from this mock-up, which prepares a second version with a higher speed and a longer laminated stack rotor. A higher air gap will decrease the voltage fluctuation in the primary winding, a smaller angular opening of the excitation frame will improve the uniformity of the flux in the rotor.
机译：本文介绍了一个实心铁缸的模型，该实心铁缸在由直流电流供电的固定激励框架中旋转。在旋转圆柱体中产生一个均匀的磁场，该磁场由外部马达驱动。测量制动扭矩，可以研究由均匀旋转场产生的铁损。目的是向矢量铁损模型发展，该模型考虑了不同的磁化方向及其相互依赖性。涡流损耗是模型中的主要损耗来源，因此更易于建模。提出了一种标准的涡流模型。它很好地模拟了中低磁通密度下的损耗，但是在饱和水平附近测得的损耗较小。这可能是由于高厚度与半径之比改变了转子边缘附近的涡流路径，随后可以通过完整的3-D有限元方法分析进行分析。进行了二维有限元方法仿真，该方法估算了转子中的磁通量异质性。从该模型中汲取了一些教训，该模型准备了具有更高速度和更长叠片式转子的第二个版本。较高的气隙将减小初级绕组中的电压波动，励磁框架的较小角度开口将改善转子中磁通量的均匀性。

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