摘要
在SPWM逆变器中,为防止同一桥臂的上下管直通现象,必须注入一定的死区时间,死区会导致逆变器的输出波形畸变,即死区效应。在分析了死区时间对单相SPWM逆变器输出波形特性的影响的基础上,提出了一种基于重复控制的死区补偿控制策略,该控制方法可有效地改善输出电压的波形畸变,并在一台单相400Hz、5.5kW装置上进行了详细的实验验证,实验结果表明了该补偿策略的有效性和实用性。
A few microseconds dead-time must be inserted into the switching signals of SPWM inverters to prevent the short circuit. This can cause the dead-time effect of the output voltage distortion. The influence of dead-time on output voltage in single-phase SPWM inverters is analyzed in detail. A novel dead-time compensation strategy, which can provide excellent inverter output voltage distortion correction based on repetitive control, is also proposed. The experimental results on a 400Hz 5.5kW prototype of inverter are presented to demonstrate the practicability and validity of the control strategy.
出处
《电工技术学报》
EI
CSCD
北大核心
2004年第2期52-57,63,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50007004)。
关键词
正弦脉宽调制
逆变器
死区
重复控制
补偿
SPWM, inverter, dead-time, repetitive control, compensation
