北京航空航天大学学报 ›› 2009, Vol. 35 ›› Issue (12): 1477-1482.

• 论文 • 上一篇    下一篇

三相DC/AC变换器死区效应分析与精确补偿

张 瑾1, 齐铂金1, 张少如2, 秦文萍3   

  1. 1. 北京航空航天大学 机械工程及自动化学院, 北京 100191;
    2. 河北师范大学 物理科学与信息工程学院, 石家庄 050016;
    3. 太原理工大学[KG*2]电气与动力工程学院, 太原 030024
  • 收稿日期:2009-02-17 出版日期:2009-12-31 发布日期:2010-09-14
  • 作者简介:张 瑾 (1980-), 男, 北京人, 博士生, zhangjin_ntu@hotmail.com.
  • 基金资助:

    国家863计划资助项目(2006AA11A145)

Analysis and accurate compensation of dead-time for three-phase DC/AC inverter

Zhang Jin1, Qi Bojin1, Zhang Shaoru2, Qin Wenping3   

  1. 1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
    2. College of Physics and Information Engineering, Hebei Normal University, Shijiazhuang 050016, China;
    3. College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2009-02-17 Online:2009-12-31 Published:2010-09-14

摘要: 在现有无死区控制方法的基础上,提出一种新的死区补偿策略.分析了死区效应以及开关器件非理想特性使逆变器输出电压产生畸变的原因,通过修正原始驱动信号,抑制了开关器件非理想特性对逆变器的影响,实现了死区效应的精确补偿.同时,改进了电流方向检测电路,提高了电流方向在零点附近的检测精度.实验结果证实,所提补偿策略简单可行,与现有死区补偿方法相比,逆变器输出波形正弦度进一步提高,获得了更优的补偿效果.

Abstract: A novel approach to compensate the dead-time effect based on the existing no-dead-time technique was presented. The reason of the inverter output voltage distortion was analyzed with the consideration of the dead-time and the non-ideal characteristics of the switching devices. The proposed method was implemented by adjusting the pulse width of the original driving signals to compensate the switching delay and voltage drop effect of the power devices, thus the effects were prevented from propagating into the ac-side. An improved current polarity detecting circuit with high precision was introduced to overcome the difficulties in current polarity detecting around the zero current crossing point. A more accurate output voltage synthesis was obtained with simple logic and flexible implementation, by applying this compensation strategy to a general purpose inverter system. Experimental results verify the effectiveness of the proposed method.

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