摘要
在铁路等大功率牵引传动系统中,由于开关损耗和散热条件等因素的限制,逆变器的最高开关频率通常受到严格的限制,此时需要采用多模式调制技术。在分析现有24扇区空间矢量脉宽调制(space vector pulse width modulation,SVPWM)技术的基础上,提出了3种具有不同脉冲数的SVPWM同步调制策略,这些调制方法适用于两电平六相电压型逆变器供电的不对称双定子感应电机。通过对比分析3种调制策略的谐波特性,提出了一套适用于大功率牵引传动系统在低开关频率条件下的多模式SVPWM调制策略;同时,也提出了多模式调制的切换策略。通过仿真和实验,对提出的多模式SVPWM调制策略进行了验证,并实现了不同调制模式之间的平滑切换。
In the high-power traction drive systems, the switching frequency of the inverter is strictly limited owing to the restrictions on switching losses and cooling conditions. In these cases, the multi-mode modulation strategy is usually adopted. Based on the analysis of the 24-sector SVPWM technique, several synchronous modulation strategies with different pulse numbers were proposed in this paper, which can be applied to the two-level six-phase voltage inverter fed asymmetrical dual stator induction machines （DSIMs）. By comparing the harmonic performance of the synchronized modulations, the authors presented a set of multi-mode SVPWM strategy, which was suitable for the high-power traction drive systems under low switching frequency. At the same time, the switching strategy for transitions between different modulation modes was proposed as well. Simulation and experimental results verified the validity and effectiveness of the proposed synchronized modulation strategies and the switching strategy between different modulation modes.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第13期3883-3891,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(51507009)
中央高校基本科研业务费专项资金资助(E15RC00030)~~
关键词
大功率牵引传动系统
低开关频率
空间矢量脉宽调制
同步调制
双定子感应电机
high-power traction drive system
lowswitching frequency
space vector pulse width modulation（SVPWM）
synchronized modulation
dual stator inductionmachine （DSIM）
