混合钳位式双PWM三电平变频调速系统  

Speed Control System With Hybrid Clamp Dual PWM Three Level Inverter

作　　者：岳云涛[1] 陈志新[1] 魏幼萍[2] 

机构地区：[1]北京建筑工程学院电信学院,北京100044 [2]中国矿业大学(北京)机电学院,北京100083

出　　处：《电工技术学报》2008年第5期69-74,共6页Transactions of China Electrotechnical Society

摘　　要：以电动机磁链定向调速系统为研究对象,提出了一种混合钳位式双PWM三电平变换器的电路拓扑,由于混合钳位式三电平变换器的开关状态由普通二极管钳位式的27个增加到64个,本文提出了通过检测的悬浮电容电压和直流侧电容电压差值来实现冗余矢量的优化方法,确保了直流电容电压的平衡,实现了系统的四象限运行。并设计了基于DSP和CPLD的控制电路和主电路,通过实验验证了所提算法的有效性和实用性。This paper focuses its researches on motor flux oriented variable frequency drive system. A novel hybrid clamp dual-PWM three-level circuit topology is discussed, the switching states of hybrid clamp three-level converters increase to sixty-four from twenty-seven switching states of diode clamp three-level converters. Optimization of its redundant voltage space vectors is proposed based on detecting voltage of clamp capacitor and difference of capacitor voltage in DC side. It can balance the DC voltage and meet the demands of AC drive four-quadrants operation. The control circuit and main circuit was designed with DSP and CPLD, experimental results proved the efficiency and practicability of the algorithm.

关 键 词：双PWM三电平 混合钳位 电压空间矢量 磁链定向 

分 类 号：TM464[电气工程—电器]