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首页> 外文期刊>Journal of the Brazilian Society of Mechanical Sciences and Engineering >Experimental performance evaluation of magnetic actuator used in rotating machinery analysis
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Experimental performance evaluation of magnetic actuator used in rotating machinery analysis

机译：用于旋转机械分析的电磁执行器的实验性能评估

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A magnetic actuator as excitation source in rotative systems is proposed, in order to accomplish modal analysis without contact between the actuator and the rotor. Although the use of electromagnets for applying forces to rotating machinery have been carried out with high performance level (for example, magnetic bearings), the development of a conveniently easy and cheap device for laboratory application presents interesting contribution to experimental methods used in test rigs based on similarity design to rotating machinery. The initial concept of the magnetic actuator proposed here is simple, but enables either the external excitation without contact or the vibration control when associated with a controller system. However, the calibrations of performance characteristics to attend the dynamic demand of the system in not so trivial. Following this focus, the paper brings practical experience and discussion about the development, calibration and performance analysis of a magnetic actuator used for rotating machinery tests. The influence of the electrical current in the actuator coils, the air-gap between actuator and rotative system, the type of surface of the actuator poles (flat or curved) as well as excitation frequency was experimentally verified and compared with theoretical concepts. Force estimation was carried out and compared with the measured force. The estimation was based on the magnetic flux density, measured by hall sensors, or input current and initial air-gap.
机译：为了完成模态分析而在执行器和转子之间不发生接触，提出了一种磁性执行器作为旋转系统中的激励源。尽管使用电磁体向旋转机械施加力的性能很高（例如，磁性轴承），但为实验室应用而开发的一种方便，便宜的廉价设备为基于试验台的实验方法提供了有趣的贡献。与旋转机械的相似性设计。这里提出的磁致动器的最初概念很简单，但是当与控制器系统相关联时，既可以进行无接触的外部激励也可以进行振动控制。然而，满足系统动态需求的性能特征的校准并不是那么简单。在此重点之后，本文带来了实践经验，并讨论了用于旋转机械测试的电磁执行器的开发，校准和性能分析。通过实验验证了执行器线圈中的电流，执行器与旋转系统之间的气隙，执行器磁极的表面类型（平坦或弯曲）以及激励频率的影响，并与理论概念进行了比较。进行力估计并将其与测得的力进行比较。估算基于霍尔传感器测得的磁通密度，或输入电流和初始气隙。

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