【作者】 张媛；

【导师】 邓智泉；

【作者基本信息】 南京航空航天大学 ， 电力电子与电力传动， 2005， 硕士

【摘要】 无轴承电机利用磁轴承结构与交流电机定子结构的相似性,把产生电磁悬浮力的绕组集成到电机中,从而同时实现转子旋转和悬浮控制。无轴承电机在继承磁轴承无磨损、无摩擦、无需润滑以及密封性好、便于维护等优点的同时,轴向长度也得到充分利用,便于电机向大功率和高速化领域发展。开关磁阻电机作为结构最简单的一种交流电机之一,具有维护方便,容错性能强,高速适应性能极佳等显著特点。无轴承技术在开关磁阻电机中的应用将有望改善开关磁阻电机的振动与噪声问题。 本文详细分析了有转子偏心情况下的无轴承开关磁阻电机的数学模型。在此基础上,研究了无轴承电机空载情况下的控制策略,并进行了实验,成功实现了空载情况下的稳定悬浮控制。分析了国外已有的无轴承开关磁阻电机负载控制策略,针对求取主绕组电流和超前角的方法进行了改进,并用此方法实现了悬浮力负载稳定悬浮。更多还原

【Abstract】 Because of the similarity between the construction of a magnetic bearing and that of a motor stator, the bearingless motor combines the radial magnetic suspension force windings into a conventional motor so that the rotor shaft may suspend and rotate at the time. Bearingless motors have the advantages of no abrasion, no friction, no lubrication, robustness and so on. The application of bearingless technology into the Switched Reluctance Motor may greatly alleviate the vibration and noise problem. The mathematical model of the Bearingless Switched Reluctance Motor (BSRM) is discussed in detail, with the rotor having radial displacements. The control strategy of the BSRM under no load condition is analyzed. The experimental results verify that the rotor shaft may be successfully suspended under no load condition. Having summarized the control strategy of the BSRM with load, a new method to deduce the ideal current in main windings and the ideal advanced angle is proposed. The experimental results indicate that the rotor shaft can be successfully suspended with radial force load by adapting the new method.更多还原