笼型转子无刷双馈电机的无功功率和稳定性  

Reactive Power and Stability of Brushless Doubly-Fed Machine With Cage Rotor

作　　者：邓先明[1] 姜建国[2] 伍小杰[1] 方荣惠[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,徐州221008 [2]上海交通大学电气工程系,上海200030

出　　处：《电工技术学报》2008年第1期40-47,共8页Transactions of China Electrotechnical Society

摘　　要：提高电机功率因数和稳定性是无刷双馈电机(BDFM)控制的主要目的,准确的数学模型是实现BDFM控制的理论基础。在详细分析BDFM电磁关系的基础上,提出转子磁场的非理想转换概念,建立相应的电路模型。利用直轴交轴理论推导出BDFM的无功功率和稳定区间的数学表达式。分析发现,改变控制电压大小可以调节功率绕组功率因数,提高电机磁场极数转换效率是增大控制电压稳定区间的有效途径。通过样机实验验证了理论分析和结论的正确性。Increasing the power factor and enhancing the stability is the primary target in BDFM control, and an exact mathematical model is the theoretical basis of control. On the basis of analyzing the electromagnetic relationship of BDFM, the concept of non-ideal conversion of rotor＇s magnetic field is put forward, and a circuit model of BDFM is given. Using the d- and q-axis theory, mathematical expressions of reactive power and stable interval are deduced respectively. On detailed analysis, it is found that the power factor of power windings could be adjusted by changing the amplitude of control voltage. Improving the magnetic field pole-number converting efficiency is an effective approach to broaden the stable interval of control voltage. Finally, the correctness of results and theoretical analyze gained from researching is verified through the experiment of laboratory BDFM.

关 键 词：无刷双馈电机 非理想转换 电路模型 功率因数 稳定区间 直轴交轴理论 

分 类 号：TM352[电气工程—电机]