中国电机工程学报
中國電機工程學報
중국전궤공정학보
ZHONGGUO DIANJI GONGCHENG XUEBAO
2014年
27期
4676-4682
,共7页
辛振%赵仁德%陈晨%郭宝玲
辛振%趙仁德%陳晨%郭寶玲
신진%조인덕%진신%곽보령
磁链观测%感应电机%同步角频率%广义积分器%锁频环
磁鏈觀測%感應電機%同步角頻率%廣義積分器%鎖頻環
자련관측%감응전궤%동보각빈솔%엄의적분기%쇄빈배
flux observer%induction motor%synchronous angular frequency%generalized integrator%frequency-locked loop
在基于电压模型的磁链观测器中,通常采用低通滤波器代替纯积分来解决纯积分环节存在的初值问题和漂移问题。但是,使用低通滤波器会在观测结果中引入幅值误差和相位误差,为了消除幅相误差,一般需要误差动态补偿环节,补偿环节的精度通常依赖于异步电机同步角频率的准确估计。已有文献提出了基于二阶广义积分器-锁频环的异步电机同步角频率估计方法,该方法具有优异的稳态性能,但动态性能不佳。该文对该算法的动态特性进行了理论分析,在此基础上,提出了基于双二阶广义积分器-锁频环的异步电机同步角频率估计方法。对两种同步角频率估计方法的动态特性进行了对比研究,研究表明,双二阶广义积分器-锁频环算法具有更优异的动态性能。构建了基于异步电机矢量控制的转速电流双闭环调速系统实验平台,实验结果验证了所提方案的有效性。
在基于電壓模型的磁鏈觀測器中,通常採用低通濾波器代替純積分來解決純積分環節存在的初值問題和漂移問題。但是,使用低通濾波器會在觀測結果中引入幅值誤差和相位誤差,為瞭消除幅相誤差,一般需要誤差動態補償環節,補償環節的精度通常依賴于異步電機同步角頻率的準確估計。已有文獻提齣瞭基于二階廣義積分器-鎖頻環的異步電機同步角頻率估計方法,該方法具有優異的穩態性能,但動態性能不佳。該文對該算法的動態特性進行瞭理論分析,在此基礎上,提齣瞭基于雙二階廣義積分器-鎖頻環的異步電機同步角頻率估計方法。對兩種同步角頻率估計方法的動態特性進行瞭對比研究,研究錶明,雙二階廣義積分器-鎖頻環算法具有更優異的動態性能。構建瞭基于異步電機矢量控製的轉速電流雙閉環調速繫統實驗平檯,實驗結果驗證瞭所提方案的有效性。
재기우전압모형적자련관측기중,통상채용저통려파기대체순적분래해결순적분배절존재적초치문제화표이문제。단시,사용저통려파기회재관측결과중인입폭치오차화상위오차,위료소제폭상오차,일반수요오차동태보상배절,보상배절적정도통상의뢰우이보전궤동보각빈솔적준학고계。이유문헌제출료기우이계엄의적분기-쇄빈배적이보전궤동보각빈솔고계방법,해방법구유우이적은태성능,단동태성능불가。해문대해산법적동태특성진행료이론분석,재차기출상,제출료기우쌍이계엄의적분기-쇄빈배적이보전궤동보각빈솔고계방법。대량충동보각빈솔고계방법적동태특성진행료대비연구,연구표명,쌍이계엄의적분기-쇄빈배산법구유경우이적동태성능。구건료기우이보전궤시량공제적전속전류쌍폐배조속계통실험평태,실험결과험증료소제방안적유효성。
In order to solve the dc drift and the initial value problems of the pure integrator in the voltage-model-based flux observer, the low-pass filter (LPF) is often used. However, the LPF may produce magnitude error and phase error in the estimated flux. Thus, a compensation block is often used to eliminate these errors. The performance of the LPF-based flux estimation method often highly depends on the accuracy of the synchronous angular frequency. We recently presented a new synchronous angular frequency estimation method based on second-order generalized integrator frequency-locked loop. However, the dynamic performance of this method is not very satisfactory. This paper presents a detailed theoretical analysis on the dynamic errors of this method. Further, an improved method based on dual second-order generalized integrator frequency-locked loop is presented. The properties and performance of the new synchronous angular frequency estimation method are analyzed in comparison to the former one, demonstrating that it has improved dynamic response. An induction motor speed control system is built based on the vector control and controlled by TMS320F2812 DSP. Simulation and experimental results prove the effectiveness of the proposed method.