交流电机的等效谐波绕组模型理论

The Theory of the Equivalent Harmonic Winding Model Used in the AC Machines

等效谐波绕组模型（ＥＨＷＭ）意指以基于电密等效原则构造的等效谐波绕组（ＥＨＷ）为分析计算单元并通过多阶次ｄ－ｑ－０变换所构成之ｄ／ｑ双轴电机模型及电机基本方程式，是对交流电机进行包含定于空间谐波磁势磁通与转子回路耦合作用在内的瞬、稳态运行场路分析的基本数理模型。在含零序电流时交流电机中并存两类不同性质的电磁体系。理论和实例分析表明，零序电流的合成磁势的三次谐波是有可能在耦合效应上与非零序电流的基波合成磁势相抗衡的特殊高次谐波，零序电流作用应重新认识。

in this paper,a new theoretical model of a. c. machine talled as Equivalent Harmonic Winding Model (EHWM)is presented for analyzing their operating behaviors in both the steady and transient states with such a peculiarity that the coupling effect of any stator space m. m. f. flux to the rotor loops can be considered together with their fundamental m. m. f.flux. So,EHWM is more accurate than the conventional 'idealized machine model'. Based on EHWM .there proved to be two different electromagnetic systems in a. c. machines when serosequence current exists. The theoretical demonstration analysis shows that the currents in the rotor damper winding produced by the stator zero-sequence current excited third harmonic m.m. f. flux are comparable in magnitude to that produced by the stator fundamental m. m. f. flux when the zero-sqeuqnce current is comparable to the non-zero-sequence current. Thus,it is necessary to renovate the conventional concept of the zero-sequence current effects.