交流电机绕组的气隙磁势与电势计算

Calculation of Air-gap MMF and EMF of Armature Windings in AC Electric Machines

磁势和电势是"电机学"课程的重要概念。本文给出了气隙磁势和线圈波形函数定义,利用空间周期性的傅立叶分解和正弦函数复数表示,计算出气隙磁势与相轴位置,利用磁极和电枢磁场的特点分别计算了相电势,理清了交流电机的基本内容,突出了单元电机分析交流电机的理论依据。

Magneto-motive force （MMF） and electromotive force （EMF） are two important concepts in Electric Ma- chinery course. Definitions of air-gap MMF and waveform function are introduced in this paper. Utilizing Fourier decomposition of spatial periodic function and complex expressions for both spatial and temporal sinusoidal func- tions, air-gap MMF is calculated so that phase axes are naturally obtained. Transient EMF of arbitrary phase wind- ing is derived in accordance with both excitation and armature fields. This paper clarifies the basic concepts and emphases on the theoretical fundamentals of AC electric machines as an element machine.