关键词: 交流励磁机, 阻尼绕组, 旋转整流器, 换相角, 场路耦合

Abstract: To improve the excitation performance of the AC exciter, the influence of the commutation angle on the voltage and current of the AC and DC sides of the rotary rectifier was reduced by adding damping windings to the stator poles of the AC exciter. The equivalent analysis of the commutation process was performed using the equivalent circuit analysis method, and the output current and voltage curves of the alternator were obtained using FEM simulation software combined with the field-circuit coupling method. The circuit equivalent and field coupling analysis show that the presence of commutation angle degrades the output voltage and current quality, so adding damped windings on the stator poles
effectively reduces the phase change angle of the AC exciter while improving the power quality.

Key words: AC exciter, damping winding, rectifier, commutation angle, field-circuit coupling