检索结果-内蒙古大学图书馆

control loop design of sequential switching shunt regulator considering the influence of double section functioning

IET POWER ELECTRONICS 2014年第4期7卷 998-1007页

作者： Li, Fang You, Xiaojie Li, Yan Beijing Jiaotong Univ Sch Elect Engn Inst Elect Engn Beijing 100044 Peoples R China

Sequential switching shunt regulator (S3R) has been widely used in satellites for its simple structure and high reliability. Double section functioning, which has two sections operating simultaneously, is the other operating mode of S3R beside the normal mode. It is inevitable and can lead to larger bus voltage ripple, less controllability and higher switching losses. A detailed analysis based on the double section functioning process description is given on the boundary load current, the main bus voltage ripple and the switching frequency. Considering the influence of double section functioning, a new method of control loop design of S3R is proposed based on the small single mathematical model. A 4.5 kW S3R prototype is built to verify the control loop design, and the load region of double section functioning can be limited as designed.

关键词： controllability sequential circuits sequential switching power 4 5 kW switching frequency boundary load current double section functioning process switching losses controllability bus voltage ripple S3R sequential switching shunt regulator control loop design

来源：评论

学校读者我要写书评

暂无评论

control loop design and control Performance Study on Direct Internal Reforming Solid Oxide Fuel Cell

引用

FUEL CELLS 2009年第5期9卷 722-728页

作者： Zhang, H. Weng, S. Su, M. Shanghai Jiao Tong Univ Key Lab Power Machinery & Engn Educ Minist Shanghai 200240 Peoples R China

A solid oxide fuel cell (SOFC) stack is a complicated nonlinear power system. Its system model includes a set of partial differential equations that describe species, mass, momentum and energy conservation, as well as the electrochemical reliction models.. The validation and verification of the control system by experiment is very expensive and difficult. Based on the distributed and lumped model of I one-dimensional SOFC, the dynamic performance with different control loops for SOFC is investigated. The simulation result proves that the control system is appropriate and feasible, and can effectively satisfy the requirement of variable load power demand This simulation model not only can prevent some latent dangers of the fuel cell system but also predict the distributed parameters characteristics inside the SOFC system.

关键词： control loop design control Performance Distributed Parameter Dynamic Simulation Solid Oxide Fuel Cell

来源：评论

学校读者我要写书评

暂无评论

An Accurate Small Signal Modeling and control loop design of Active Clamp Flyback Converter 10

An Accurate Small Signal Modeling and Control Loop Design of...

引用

10th International Conference on Power Electronics and ECCE Asia (ICPE - ECCE Asia)

作者： Xu, Shengyou Qian, Qinsong Ren, Bowen Liu, Qi Southeast Univ Nation ASIC Syst Engn & Res Ctr Nanjing Jiangsu Peoples R China

ISBN: (纸本)9788957083130

An accurate small signal model of active clamp flyback (ACF) converter is proposed in this paper. To obtain a precise model, the ESR of output capacitor was considered. Different to traditional flyback converter, because of the resonant effect, at the three to five times of switching frequency, ACF converter was added two poles which result in high oscillation in frequency responses curve. To get sufficient phase margin and avoid resonant inductor oscillation affect, a fundamental error compensator was given to keep control loop stabled. Then a 65W prototype was implemented to verify the performance of the designed control loop, the simulation and experimental results showed that the adjusted process between different load status haven't result in much voltage overshoot or undershoot and need a long regulate time.

关键词： Active clamp Flyback State space averaging Small signal model control loop design

来源：评论

学校读者我要写书评

暂无评论

Step-by-Step design of Two-loop control System for Boost DC-DC Converter 19

Step-by-Step Design of Two-Loop Control System for Boost DC-...

引用

19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM)

作者： Aleksandrov, Ivan, V Sevostyanov, Nikita A. Gorbunov, Roman L. Novosibirsk State Tech Univ NSTU Novosibirsk Russia

In this article, control loop design for DC-DC boost converter is discussed. An analytical approach to obtain coefficients of a compensator based on impedance requirements is given in a simple step-by-step manner. A d... 详细信息

ISBN: (纸本)9781538650219

关键词： control loop design analog compensator boost converter output impedance

来源：评论

学校读者我要写书评

暂无评论

Avoiding instabilities in power electronic systems: toward an on-chip implementation

引用

IET POWER ELECTRONICS 2017年第13期10卷 1778-1787页

作者： Abusorrah, Abdullah Mandal, Kuntal Giaouris, Damian El Aroudi, Abdelali Al-Hindawi, Mohammed M. Al-Turki, Yusuf Banerjee, Soumitro King Abdulaziz Univ Renewable Energy Res Grp Fac Engn Jeddah Saudi Arabia Natl Inst Technol Sikkim Dept Elect & Elect Engn Ravangla 737139 South Sikkim India Newcastle Univ Sch Elect & Elect Engn Newcastle Upon Tyne Tyne & Wear England Univ Rovira & Virgili Dept Engn Elect Elect & Automat GAEI Res Grp Barcelona 43007 Spain Indian Inst Sci Educ & Res Kolkata Mohanpur Campus Nadia 741246 WB India

The available controller chips for power electronic systems are used for specific transient and steady-state performances. In such systems, the parameter ranges for stable operation are delimited by slow-timescale as well as fast-timescale instabilities. The usual practice is to design the control loop based on the state-space averaging technique, which cannot predict the fast-timescale instabilities. In this study, the first attempt has been made to propose a new design of the controller chip that can suppress these instabilities, thus extending the stable operating range in the parameter space. For this, the authors make use of the Filippov method which can effectively predict both types of instabilities. In this approach, the stability of the system is obtained in terms of the state transition matrices across each subsystem and saltation matrices across each switching event. The basic idea is to exercise control over the saltation matrices to increase the stability margin of the periodic orbit. Since in the Filippov approach an increase in the number of switching events in a cycle does not increase the complexity of the analysis, the proposed controller chip will be particularly useful in complex power electronic systems such as interconnected converters, multi-input multi-output converters, resonant converters, micro-grids and so on.

关键词： power integrated circuits control system synthesis circuit stability on-chip implementation controller chips steady-state performances transient performance slow-timescale instability fast-timescale instability control loop design state-space averaging technique Filippov method state transition matrices saltation matrices switching event periodic orbit Filippov approach complex power electronic systems interconnected converters multiinput multioutput converters resonant converters microgrids

来源：评论

学校读者我要写书评

暂无评论

A simplified algorithm for space vector modulation of three-phase voltage source PWM rectifier

A simplified algorithm for space vector modulation of three-...

引用

35th Annual IEEE Power Electronics Specialists Conference (PESC 04)

作者： Ma, H Lang, YP Chen, HM Zhejiang Univ Coll Elect Engn Hangzhou Peoples R China

ISBN: (纸本)0780383990

A simplified algorithm is proposed in this paper for space-vector modulation (SVM) of three-phase voltage source PWM rectifier. The transfer function and control loop design of the rectifier are detail described. For three-phase voltage source PWM rectifier, the space-vector modulation scheme has excellent features such as increased utilized voltage, easy implementation via microprocessor etc. In this paper the duty cycles of space voltage vectors are calculated directly to track the reference voltage vector in each sector of the space vector plane. It avoids the look-up tables of sine and/or arctangent and complex calculations needed in the conventional methods. Based on experimental platform for Power Electronics "PE-PRO / VC33", the experimental results demonstrated that the proposed system also has the advantages including unity input power factor and greatly reduced input line current harmonic distortion due to nearly sinusoidal input line current attainable with controlled rectifiers.

关键词： PWM power convertors rectifying circuits transfer functions harmonic distortion power conversion harmonics space vector modulation three-phase voltage source PWM rectifier transfer function control loop design duty cycles space voltage vectors reference voltage vector PE-PRO - VC33 current harmonic distortion controlled rectifiers

来源：评论

学校读者我要写书评

暂无评论

APPLYING TRANSIENT ANALYSIS TO ESTIMATE FAIL SAFE OPERATING TIME OF HEATING COILS IN LNG PLANT

APPLYING TRANSIENT ANALYSIS TO ESTIMATE FAIL SAFE OPERATING ...

引用

ASME International Mechanical Engineering Congress and Exposition (IMECE2015)

作者： Ahamad, Sultan Vallavanatt, Rimon Izadi, Mahmood Bechtel Corp Houston TX USA

ISBN: (纸本)9780791857502

A semi-analytical method is proposed in this study to estimate tube wall temperature versus time for Waste Heat Recovery Units (WHRU) and fired heaters in a typical LNG plant. The results are used to estimate Safety Time to avoid failure of tubes. Safety time estimation is crucial for control loop design of equipment in the operating plant. Two case studies are presented based on real control loop design data for an LNG plant. The results show that for both case studies, process safety time for control loop is less than the tubes safety time. Therefore the control system is capable of safely stopping the equipment from operation without tube failure or degrading of the process fluid. The proposed semi-analytical method is capable of calculating the Safety Time for WHRUs and fired heaters in an economical way while the method offers a reasonable accuracy due to its analytical nature. The proposed method can be used in Fundamental Engineering and Evaluation designs (FEEDs), Hazard and Operability studies (HAZOPs) and Hazard Identification (HAZID) studies for LNG plants and power plants.

关键词： Fired Heater Waste Heat Recovery unit Transient Analysis Fail Safe time control loop design

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：