基于U-N模型的三电平异步电机直接转矩控制仿真  

Simulation Research on Direct Torque Control of Three-level Inverter-fed Induction Motor Based on Module U-N

作　　者：陈浩[1] 周伟[1] 

机构地区：[1]西南交通大学,610031

出　　处：《电机技术》2010年第4期21-24,共4页Electrical Machinery Technology

摘　　要：构建了基于二极管钳位式三电平逆变器的直接转矩控制仿真系统。针对直接转矩控制系统存在的转矩脉动、中点电位平衡和电压跳变等问题,优化了三电平矢量选择方法。为了解决U-I和I-N磁链观测模型易受定、转子参数和转子角速度精确度的影响,系统采用了全速度范围的U-N模型,提高了定子磁链观测的精确度。最后通过Simulink仿真验证了该模型的正确性和该算法的可行性。A direct torque control simulation system was constructed based on Diode-Clamped three-level inverter. Against the problems of torque ripple, the midpoint potential balance and voltage jump, an optimized three-level vector selection methods was proposed. In order to reduce influence on the precision, of the U-I and I-N flux observer model resulted in the stator-rotor parameters and the rotor angular speed, the entire speed range U-N model was used, to improve the accuracy of flux observer. Finally, the simulation results showed the correctness of the model and the feasibility of the algorithm.

关 键 词：三电平逆变器 直接转矩控制 U-N磁链观测 异步电机 

分 类 号：TM343[电气工程—电机]