奇数相无刷直流发电机的换向过程

THE COMMUTATION PROCESSES IN BRUSHLESS DC GENERATOR WITH ODD PHASES

分析了奇数相无刷直流发电机的换向过程，电机由奇数相电枢绕组外接多相全波整流桥组成，在假定条件下，得到了二极管随负载电流变化的导通规律，即：进入换向角ρ，换向重叠角γ随负载Ｉ的变化规律，得出解析结果，并计算了相电流，在此基础上，可以很方便分析电机的稳态性能。

The paper analyxes the commutation processes in a brushless DC generator with oddphases. The machine comprises odd phase armature winding with a polyphase full wave rec-tifier bridge. The conductive regularities of diodes with the load current,that is,the varia-tion of the overlap angle γ and the delayed angle ρ with load current are discussed in detailunder some hypotheses,and analytical results are obtained.The computed phase current isin good agreement with the result available in reference,Based on this method,the staticcharacteristics of a genernter can be analysed with ease.