随着工业自动控制行业的快速发展,对DCS(Distributed Control System)控制系统应用的新需求不断提出。为了适应DCS控制系统的高可靠、智能化、开放性的需求,本文通过应用工业以太网技术,结合以太网的带宽资源,提出了一种新型DCS系统控...随着工业自动控制行业的快速发展,对DCS(Distributed Control System)控制系统应用的新需求不断提出。为了适应DCS控制系统的高可靠、智能化、开放性的需求,本文通过应用工业以太网技术,结合以太网的带宽资源,提出了一种新型DCS系统控制站硬件架构设计。该设计打破了传统DCS控制现场总线的瓶颈,实现了自主研发DCS控制系统高速传输,高实时性、高开放性,并具有灵活拓展的DCS控制站新的硬件拓扑结构。展开更多
Modelling of bidirectional full bridge DC-DC converter as one of the most applicable converters has received significant attention. Mathematical modelling reduces the simulation time in comparison with detailed circui...Modelling of bidirectional full bridge DC-DC converter as one of the most applicable converters has received significant attention. Mathematical modelling reduces the simulation time in comparison with detailed circuit response;moreover it is convenient for controller design purpose. Due to simple and effective methodology, average state space is the most common method among the modelling methods. In this paper a bidirectional full bridge converter is modelled by average state space and for each mode of operations a controller is designed. Attained mathematical model results are in a close agreement with detailed circuit simulation.展开更多
Multilevel inverter has become increasingly popular in recent years due to advantages of high power quality waveforms, low switching losses, and high-voltage capability. A novel multilevel inverter with minimum number...Multilevel inverter has become increasingly popular in recent years due to advantages of high power quality waveforms, low switching losses, and high-voltage capability. A novel multilevel inverter with minimum number of separated DC sources is presented in this paper. Three-phase output voltages of this inverter can easily be balanced because they are synthesized by using the same DC sources. A harmonic reduction method eliminating both the 5th and 7th harmonics is proposed. Finally, comparison results and spectral analysis are presented. Key words multilevel inverter - topology - DC source - harmonic reduction - spectrum Project supported by the Postdoctoral Science Foundation of Shanghai (Grant No. kO7)展开更多
文摘随着工业自动控制行业的快速发展,对DCS(Distributed Control System)控制系统应用的新需求不断提出。为了适应DCS控制系统的高可靠、智能化、开放性的需求,本文通过应用工业以太网技术,结合以太网的带宽资源,提出了一种新型DCS系统控制站硬件架构设计。该设计打破了传统DCS控制现场总线的瓶颈,实现了自主研发DCS控制系统高速传输,高实时性、高开放性,并具有灵活拓展的DCS控制站新的硬件拓扑结构。
文摘Modelling of bidirectional full bridge DC-DC converter as one of the most applicable converters has received significant attention. Mathematical modelling reduces the simulation time in comparison with detailed circuit response;moreover it is convenient for controller design purpose. Due to simple and effective methodology, average state space is the most common method among the modelling methods. In this paper a bidirectional full bridge converter is modelled by average state space and for each mode of operations a controller is designed. Attained mathematical model results are in a close agreement with detailed circuit simulation.
文摘Multilevel inverter has become increasingly popular in recent years due to advantages of high power quality waveforms, low switching losses, and high-voltage capability. A novel multilevel inverter with minimum number of separated DC sources is presented in this paper. Three-phase output voltages of this inverter can easily be balanced because they are synthesized by using the same DC sources. A harmonic reduction method eliminating both the 5th and 7th harmonics is proposed. Finally, comparison results and spectral analysis are presented. Key words multilevel inverter - topology - DC source - harmonic reduction - spectrum Project supported by the Postdoctoral Science Foundation of Shanghai (Grant No. kO7)
