当前位置: X-MOL 学术Electr. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Analysis and performance evaluation of a three-phase sparse neutral point clamped converter for industrial variable speed drives
Electrical Engineering ( IF 1.8 ) Pub Date : 2021-06-07 , DOI: 10.1007/s00202-021-01290-w
Davide Cittanti , Mattia Guacci , Spasoje Mirić , Radu Bojoi , Johann Walter Kolar

This paper analyzes the operation and characterizes the performance of a three-phase three-level (3-L) Sparse Neutral Point Clamped converter (SNPCC) for industrial variable speed drives (VSDs). The operating principle of the SNPCC, which advantageously employs a lower number of power transistors than a conventional 3-L inverter, is described in detail, focusing on the AC-side differential-mode and common-mode voltage formation and on the DC-side mid-point current generation processes. The degrees of freedom in the SNPCC modulation scheme are defined and several switching sequences are investigated. Afterwards, the stresses on the active and passive components (e.g. semiconductor losses, machine phase current ripple, DC-link capacitor RMS current, etc.) are calculated by analytical and/or numerical means, enabling a straightforward performance comparison among the identified switching sequences. The most suited modulation strategy for VSD applications is then selected and a chip area sizing procedure, aimed at minimizing the total semiconductor chip size, is applied to a 800V 7.5kW three-phase system. The performance limits of the designed SNPCC are evaluated and finally compared to the ones of conventional 2-L and 3-L solutions, highlighting the promising cost/performance trade-off of the analyzed topology.



中文翻译:

工业变速驱动三相稀疏中点钳位变流器的分析与性能评价

本文分析了用于工业变速驱动器 (VSD) 的三相三电平 (3-L) 稀疏中性点钳位转换器 (SNPCC) 的操作并表征其性能。详细描述了 SNPCC 的工作原理,它比传统的 3-L 逆变器使用更少数量的功率晶体管,重点介绍交流侧差模和共模电压的形成以及直流侧中点电流生成过程。定义了 SNPCC 调制方案的自由度,并研究了几个开关序列。然后,通过分析和/或数值方法计算有源和无源组件上的应力(例如半导体损耗、机器相电流纹波、直流母线电容器 RMS 电流等),能够在已识别的切换序列之间进行直接的性能比较。然后选择最适合 VSD 应用的调制策略,并将旨在最小化总半导体芯片尺寸的芯片面积调整程序应用于 800V 7.5kW 三相系统。对设计的 SNPCC 的性能极限进行了评估,并最终与传统的 2-L 和 3-L 解决方案进行了比较,突出了所分析拓扑的有希望的成本/性能权衡。

更新日期:2021-06-07
down
wechat
bug