CAJ | 학술논문

PWM调制方式及控制器参数对感应电机矢量控制系统性能有较大影响,使电机在低速时电流脉动和转矩脉动较大.以磁链、转矩闭环的电机矢量控制方法为基础,提出了磁链跟踪控制(Space Vector PWM,SVPWM)的感应电机矢量控制系统仿真模型及低速变控制器参数的控制方法,高度模拟实际系统,并考虑逆变器死区时间的影响,在不同的调速范围下,进行了系统性能分析.在转子磁链定向准确,转子磁链构造准确的前提下,仿真结果表明磁链跟踪控制的矢量控制系统跟踪磁链为准圆形,在低速下,电机电流脉动和转矩脉动都比较小,使系统能够稳定运行,对于解决感应电机高性能调速的低速问题给出了可行的途径.
PWM조제방식급공제기삼수대감응전궤시량공제계통성능유교대영향,사전궤재저속시전류맥동화전구맥동교대.이자련、전구폐배적전궤시량공제방법위기출,제출료자련근종공제(Space Vector PWM,SVPWM)적감응전궤시량공제계통방진모형급저속변공제기삼수적공제방법,고도모의실제계통,병고필역변기사구시간적영향,재불동적조속범위하,진행료계통성능분석.재전자자련정향준학,전자자련구조준학적전제하,방진결과표명자련근종공제적시량공제계통근종자련위준원형,재저속하,전궤전류맥동화전구맥동도비교소,사계통능구은정운행,대우해결감응전궤고성능조속적저속문제급출료가행적도경.
PWM method and controller parameters of the induction motor(IM) vector control system are discussed to avoid the severe current pulsation and torque pulsation.Based on the closed loop of flux and electromagnetic torque,a simulation model of IM vector control systems with flux tracking PWM method is proposed,and the dead zone effect of inverters is considered.And the method of varied parameters of controllers under the lowest speed condition is proposed.The rotor flux is oriented and built up accurately.The performance of the system is analyzed in the different speeds.The simulation results show that the locus of the tracking flux is near a circular shape,and the proposed method can solve the problem of the current pulsation and torque pulsation of the motor when the motor runs in the lowest speed.