电机铁芯磁性能测试系统的研制

【作者】 郑赛军；

【导师】 黄进；

【作者基本信息】 浙江大学 ， 电机与电器， 2004， 硕士

【摘要】 定子是电机的重要部件，而铁芯作为定子中的核心元件，它的磁性能的好坏与否对电机的正常运行有着重要的影响。铁损是评判电机铁芯性能的一个重要指标，如果铁损太大，在定子绕组中加励磁电流后则会产生发热和效率下降等不良现象。因此，在电机的生产过程中，应该及时对定子铁芯的磁性能进行检测，避免不合格的铁芯影响电机的质量。 针对此问题，本文基于计算机测试技术研制了电机铁芯磁性能测试系统。本测试系统可以实现自动保持磁感应强度B波形为正弦形，从而避免了对测试数据还要进行波形修正的麻烦，提高了测试的精度。同时，它可以对幅值磁感应强度B_m进行自动调节，测试时简单方便，提高了测试自动化程度。 本测试系统主要进行以下两方面的测试，一是在同一个B_m下对同一型号的不同电机铁芯进行铁损测试；二是对电机铁芯的交流磁化曲线和铁损曲线的自动测试。试验证明，本测试系统测试精度高、稳定性好，并具有良好的人机交互界面，便于操作者使用。 本文详细介绍了电机铁芯测试系统的原理、硬件电路和软件设计等内容，最后给出了测试结果并对数据进行了分析和处理。更多还原

【Abstract】 The stator is an important component of a motor. And the magnetic performance of the core, which is the key part of the stator, has a significant effect on the performance of a motor. The core loss is an important criterion of its performance. If the core loss is too large, it will be heated and the efficiency will be decreased when add the exciting current to the stator coils. So we should check the magnetic performance of the core to ensure the quality of the motor during its manufacturing.This paper develops a test system for the magnetic performance of the core based on the test techniques of computer. This test system can maintain the magnetic flux density (5) for sine wave automatically. So we needn’t revise the testing data because of the distortion of the waveform. And it also increases the precision of the test. This test system can also adjust the amplitude of the magnetic flux density. So it is easy to use and increases the degree of the test automatization.This test system can apply to two kinds of measurements. One is the automatic measurement of the core loss for the different core of the same type under the same amplitude of the magnetic flux density; the other is the automatic measurement of the alternate magnetization curve and the core loss curve for the core. The experiments prove that it has advantages such as high precision, good stability etc.The paper presents the principle, hardware circuit and software design of the test system for the magnetic performance of the core in detail. Then the test data are presented and analyzed in this paper.更多还原