摘要
成功地给出了变频器供电异步电动机稳态模型。对ＶＶＶＦ变频器，先把输出电压分解成基波和各次谐波，再分别导出了当谐波次数ｉ＝３ｋ－１，ｉ＝３ｋ－２，ｉ＝３ｋ（ｋ≥１，为正整数）时的等效电路。计算了电流谐波畸变率、电机损耗与效率，实验与计算吻合较好。本文的结果为研究ＰＷＭ的生成模式、提高电机出力提供了准确可靠的计算方法。
This paper presents the steady model of the induction motor powered by PWM converter.To VVVF converter,the paper firstly decomposes its output voltage into the fundamental waves and the individual harmonic wave,and then leads to the individual equivalent circuit when the harmonic factor“i”is “3k”,or“3k-1”,or“3k-2”(“k” is a positive integer and is greater than or equal to “1”).Using this equivalent circuit,the current harmonic distortion factor,the motor loss and the efficiency are calculated successfully in this paper.The results of experiment are in pretty agreement with which of calculation,and these results provide an accurate and reliable calculating method for studying the production mode of PWM and for raising the efficiency of motor.
出处
《电气传动自动化》
1996年第2期9-13,18,共6页
Electric Drive Automation
关键词
变频器
异步电动机
电流谐波
frequency converter induction motor current harmonic wave
