• 首页|关于本刊|编委阵容|投稿指南|审稿指南|订阅指南|征稿启事|诚邀专家|学术道德|English
  • E-mail:
  • 密 码: 
  •    
  • 用户名:
  • 密 码: 
  •    
最新录用 更多>>
三电平直流变换器的交错式PWM方法
Interleaved PWM method for Three Level DC/DC Converter
投稿时间:2017-11-27  修订日期:2017-12-29
DOI:
中文关键词:  脉冲宽度调制  三电平  均压
英文关键词:pulse width modulation  three-level  voltage-balancing
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
刘威 浙江大学电气工程学院 peliuw@zju.edu.cn 
吕征宇 浙江大学电气工程学院 eeluzy@cee.zju.edu.cn 
摘要点击次数: 60
全文下载次数: 
中文摘要:
      三电平结构可将开关管的电压应力箝位于输入电压的一半,因此在高输入电压场合得到了广泛应用。为保证三电平变换器的正常运行,输入分压电容和隔直电容上的电压必须基本平衡,而实际电路中的驱动电路延时不一致等问题可能导致电压失衡。本文提出了一种具有更强均压能力的脉冲宽度调制(PWM)方法,该方法通过交错使用两种传统的PWM方法实现。交错式PWM方法将隔直电容电压与输入分压电容电压解耦,同时保证前者一直维持在理想值附近,大大简化了采样电路和均压策略,因此只需要调节驱动信号间的相位差便可以实现电压平衡。实验结果验证了所提调制方法和均压策略的有效性。
英文摘要:
      Since the voltage stress on the power switches is only half of the input voltage, three-level (TL) converters have been widely used in high volt-age applications. To ensure normal operation of TL converters, the voltages on the input divided capacitors and the blocking capacitor must be essentially balanced, whereas asymmetry of the drive circuit in practice may result in unbalance of these voltages. This paper proposes a novel Pulse-Width Modulation (PWM) method with better voltage-balancing ability, which is implemented by interleaving two traditional PWM methods. The new PWM method decouples the blocking capacitor voltage from the voltages of the input divided capacitors, and ensures that the former voltage is always kept around its ideal value, which can greatly simplify the sampling circuit and the voltage-balancing strategy. Thus, only the phase shift between the driving signals is adjusted to achieve voltage balance. Experimental results are presented to verify the effective-ness of the proposed method and voltage-balancing strategy.
  查看/发表评论  下载PDF阅读器
关闭