CAJ | 학술논문

在对永磁同步电机有功功率和无功功率与系统稳定运行所需转矩和磁链之间的内在关系进行分析的基础上,提出了永磁同步电机基于开关表的直接功率控制新方法.该方法通过计算瞬时有功功率和瞬时无功功率的两个滞环输出,并根据定子磁链所在的扇区,从瞬时功率开关表中查询出合适的开关电压矢量进行输出,从而对瞬时功率进行直接控制.本文以无功功率等于零为控制目标,即需把无功功率控制在零附近很小的范围内波动,使得在电机输出同样有功功率的条件下,提高了电机的功率因数,使无功功率降到最小,达到了节能的目的.仿真和实验结果证明了该控制方案的有效性和正确性,该方法在节能电机驱动系统中有着广阔的应用前景.
재대영자동보전궤유공공솔화무공공솔여계통은정운행소수전구화자련지간적내재관계진행분석적기출상,제출료영자동보전궤기우개관표적직접공솔공제신방법.해방법통과계산순시유공공솔화순시무공공솔적량개체배수출,병근거정자자련소재적선구,종순시공솔개관표중사순출합괄적개관전압시량진행수출,종이대순시공솔진행직접공제.본문이무공공솔등우령위공제목표,즉수파무공공솔공제재령부근흔소적범위내파동,사득재전궤수출동양유공공솔적조건하,제고료전궤적공솔인수,사무공공솔강도최소,체도료절능적목적.방진화실험결과증명료해공제방안적유효성화정학성,해방법재절능전궤구동계통중유착엄활적응용전경.
Based on the analysis of relationship of the active power, reactive power, torque and stator flux-linkage, a new direct power control(DPC) method for permanent magnet synchronous machine is presented in this paper. It selects optimum voltage vector to control the instantaneous power through optimum switching table which based on the sector of flux linkage and the output of the active and reactive power hysteresis. The goal of the method is to control reactive power as zero and improve power factor at the same output of active power. Both the results of simulation and experiment show the good performance and accuracy of the proposed method. Especially, this method has good application prospect in energy saving motor driven systems.