独立磁路混合励磁电机的矩阵分析

独立磁路混合励磁电机结构特殊，分析计算也区别于常规电机。运用矩阵分析方法，导出该电机的稳态和动态数学模型，分析其磁场大范围可调制的机理，并给出一台由转枢式交流励磁机供电(无刷)的独立磁路混合励磁试验样机的计算实例及试验结果，获得了满意的一致性。计算数据与试验结果表明：改变电励磁磁势(magnetomtive force，MMF)的大小和方向可改变电枢感应电势(electromotive fore，EMF)的大小，而且感应电势与电励磁磁势近似成线性关系；由于励磁电流由转枢式交流励磁机提供，无需电刷，提高了系统的可靠性；独立磁路混合励磁电机和转枢式交流励磁机一体化设计，减小了体积，使系统结构更紧凑可靠。

Matrix Analysis of Hybrid Excitation Machine With Isolated Magnetic Paths

Due to its special configuration, the hybrid excitation machine with isolated magnetic paths (HEIMP) differs from the conventional ones in analysis. In this paper, by means of the matrix analysis, the steady-state and the transient mathematical models of this machine were derived. The mechanism of the wide-range adjustability of its field was explained. The computed results of a prototype machine integrated with a rotating-armature AC exciter (brushless) were given in comparison with the tested ones. They are well agreed as expected. Both the computed and the tested results show that the adjustment of the electric excitation MMF (magnetomotive force) in magnitude and direction can efficiently adjust the induced EMF (electromotive force) in the armature winding. And the relationship between the induced EMF and the electric excitation MMF appears approximately linear. Since the exciting current is supplied with the rotating-armature AC exciter, there is no need for brushes which promotes the reliability of the system. The integrated design of the HEIMP machine with the rotating-armature AC exciter reduces the volume of the machine and makes the system more compact and reliable.