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首页> 美国卫生研究院文献>Heliyon >Time response enhancement for variable speed drive systems by using five-level cascade four quadrant chopper in dc-link
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Time response enhancement for variable speed drive systems by using five-level cascade four quadrant chopper in dc-link

机译：通过使用DC-Link中的五级级联四象限斩波器来实现变速驱动系统的时间响应增强

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摘要

This research introduces a filtering circuit design integrated with the DC-link of a medium power variable speed drive (VSD) system. The designed filtering circuit employs modern power electronic circuits to improve time response characteristics in both grid and dc-link sides. Depending on the widely used multi-level converters, a conventional three-level H-bridge four-quadrant chopper scheme was developed into a cascade five-level H-bridge four-quadrant chopper scheme. The time response of the proposed system was performed with both choppers, and results showed that voltage drop on cascade chopper transistors was reduced to half in comparison with voltage drop on conventional four-quadrant chopper transistors. Moreover, the sharp fluctuations in system's waves were mitigated; consequently, time response characteristics in both steady and transient states were remarkably improved. The total harmonic distortion factor THD% of the input current and voltage was reduced to 26.2% and 2.43% respectively and the ripple factor RF for DC-link current was reduced to 0.196.
机译：本研究介绍了与中型功率变速驱动器（VSD）系统的DC链路集成的过滤电路设计。设计的滤波电路采用现代电力电子电路，以提高电网和直流链路侧的时间响应特性。根据广泛使用的多级转换器，传统的三级H桥四象限斩波器方案开发成级联五级H桥四象限斩波器方案。用两种切割者进行所提出的系统的时间响应，结果表明，与传统的四象曲折型晶体管上的电压降相比，级联斩波器晶体管上的电压降减少到一半。此外，减轻了系统波浪中的急剧波动;因此，稳态和瞬态状态的时间响应特性显着提高。输入电流和电压的总谐波失真因子Thd％分别降至26.2％和2.43％，DC-Link电流的纹波因子RF降至0.196。

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