基于abc坐标系空间矢量控制的三相四桥臂电压源型逆变器研究  

Research on the Four-Leg Voltage Source Inverters Based on Space Vector Modulation in abc Coordinates

作　　者：吴睿[1] 谢少军[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016

出　　处：《电工技术学报》2005年第12期47-52,共6页Transactions of China Electrotechnical Society

摘　　要：将一种新的空间矢量调制方法应用于三相四桥臂逆变器,采用基于abc坐标系的空间矢量调制方法,避免了传统的αβγ坐标变换,使开关矢量的选取和占空比的计算更简单,显著降低了调制算法的复杂性。通过采样三相负载电流和直流母线电压来实时计算给定的参考电压,使得本逆变器可适应不同的负载。基于电压有效值调节稳定系统输出电压,本文详细说明了基于abc 坐标系的空间矢量脉宽调制算法和参考电压的获取方法。该逆变器直流电压利用率高,并能带任意线性、不对称的时变负载,仿真和实验结果证明了该方案的可行性。A novel space vector modulation is applicated to four-leg inverter. The new algorithm uses abc coordinates avoiding the α β У transformation, which makes the selection of the switching vectors and duty cycles easier and drastically reducing the complexity of modulation algorithm. The given reference voltages are calculated timely by the load currents and bus voltage, so the inverter could works on variable load conditions. The new algorithm and the method to obtain the reference voltage are described in detail. The inverter output is stabilized by voltage regulation loop. The novel inverter has a high utilization of the dc link voltage, and could deal with banlanced and unbalanced three-phase loads. The simulation and experimental results verify the feasibility of the proposed inverter scheme.

关 键 词：逆变器 空间矢量调制 ABC坐标系 三相四桥臂 

分 类 号：TM464[电气工程—电器]