IET Power Electronics最新文献_第2页

Two efficient three-mode control strategies for four-switch buck-boost converters 四开关降压-升压转换器的两种高效三模式控制策略

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-08-23 DOI: 10.1049/pel2.12759

Da Zhang, Yu Gu, Donglai Zhang, Xiaofeng Zhang, Haijin Li, Anshou Li

{"title":"Two efficient three-mode control strategies for four-switch buck-boost converters","authors":"Da Zhang, Yu Gu, Donglai Zhang, Xiaofeng Zhang, Haijin Li, Anshou Li","doi":"10.1049/pel2.12759","DOIUrl":"https://doi.org/10.1049/pel2.12759","url":null,"abstract":"The bidirectional DC-DC conversion, as an important application scenario, places certain requirements on the topology structure. The four-switch buck-boost (FSBB) converter has received widespread attention due to its simple structure, flexible control and state switchability. However, the traditional control strategy makes it difficult to meet the requirements of high performance, high stability and high security at the same time. Furthermore, the control methods commonly adopted in domestic and international practical applications rely heavily on analogue control, which cannot maintain efficiency over a wide stability range. The use of digital control methods allows for optimized control algorithms, maintaining stable system operation and improving efficiency. Therefore, it is very important to use the digital control method to further improve the smoothness and steady-state efficiency of the system multi-mode switching while maintaining a wide input and output range, based on this, this study proposes two new three-mode control modes: interleaved bias control mode and dual-edge bias control mode.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12759","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved weighting factor selection method of predictive torque control for PMSM 改进 PMSM 扭矩预测控制的权重系数选择方法

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-08-16 DOI: 10.1049/pel2.12761

Tao Liu, Yawei Yu, Longnv Li, Guxuan Xu, Gaojia Zhu

{"title":"Improved weighting factor selection method of predictive torque control for PMSM","authors":"Tao Liu, Yawei Yu, Longnv Li, Guxuan Xu, Gaojia Zhu","doi":"10.1049/pel2.12761","DOIUrl":"https://doi.org/10.1049/pel2.12761","url":null,"abstract":"In the traditional predictive torque control strategy, the cost function considers two different control objectives: stator flux and torque. Therefore, it is necessary to reasonably set the weighting factor to ensure that the optimal voltage vector is accurately selected during the control process, thereby achieving better torque and flux control performance. In view of the complex tuning process caused by traditional predictive torque control setting method of weighting factor, a new weighting factor selection method for permanent magnet synchronous motor control system is proposed in this paper. The derivation process is based on the equivalent transformation between the torque–flux prediction and the voltage vector prediction. If both the cost functions of the torque–flux and voltage vector reach their minimum values, the same output voltage vector will be selected. Compared with previous studies, the algorithm proposed in this paper can find the precise location of the optimal weighting factor without changing the form of the cost function, which simplifies the parameter tuning process. Experimental results are also provided to validate the effectiveness of the proposed algorithm.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12761","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust predictive control strategy for grid-connected inverters with ultra-local model based on linear matrix inequality 基于线性矩阵不等式的超局部模型并网逆变器鲁棒预测控制策略

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-08-13 DOI: 10.1049/pel2.12760

Chunxi Liu, Fangrui Hong, Zhile Liu, Li Zhou, Xuanxu Jin, Zhiwei Lin

引用次数: 0

Design and analysis of a decoupled three-phase coil array for inductive power transfer systems 设计和分析用于电感式功率传输系统的去耦三相线圈阵列

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-08-10 DOI: 10.1049/pel2.12762

Osama A. Almulla, Duleepa J. Thrimawithana, Grant A. Covic, Seho Kim

引用次数: 0

Active elimination of DC bias current of a SiC based dual active bridge by controlling the dead time period 通过控制死区时间段主动消除基于 SiC 的双主动桥的直流偏置电流

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-08-08 DOI: 10.1049/pel2.12753

Ganesan Perumal, Kamalesh Hatua, Manju Rajagopal

{"title":"Active elimination of DC bias current of a SiC based dual active bridge by controlling the dead time period","authors":"Ganesan Perumal, Kamalesh Hatua, Manju Rajagopal","doi":"10.1049/pel2.12753","DOIUrl":"10.1049/pel2.12753","url":null,"abstract":"Dual active bridge (DAB) is an isolated DC-DC converter gaining wider attention in power electronics applications. The high frequency (HF) transformer is an integral part of the DAB which is prone to saturation. Silicon carbide (SiC) based DAB are generally preferred for highly efficient power conversions, calling for an extremely low DC resistance of the transformer. This aggravates the DC bias issue significantly. The DC bias current generally flows due to the mismatch in static and transient switching of active devices, leading to eventual saturation of the transformer. This paper proposes an active method to precisely control the dead time of the devices (8–100 ns) without sacrificing the voltage utilization of the converter. This method does not require a sophisticated DC offset current measurement technique. The field programmable gate array (FPGA) based control platform on the gate driver side executes the proposed algorithm. The proposed control is experimentally verified in a 5 kW SiC based converter. The control implementation methodology is discussed with the support of necessary experimental results.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12753","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141926433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Model predictive control of 3L-NPC inverter to enhance fault ride through capability under unbalanced grid conditions 3L-NPC 逆变器的模型预测控制，提高不平衡电网条件下的故障穿越能力

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-08-05 DOI: 10.1049/pel2.12754

Cameron Smith, Ameen Gargoom, M. T. Arif, Md. Enamul Haque

{"title":"Model predictive control of 3L-NPC inverter to enhance fault ride through capability under unbalanced grid conditions","authors":"Cameron Smith, Ameen Gargoom, M. T. Arif, Md. Enamul Haque","doi":"10.1049/pel2.12754","DOIUrl":"https://doi.org/10.1049/pel2.12754","url":null,"abstract":"Unbalanced voltages are becoming increasingly common in distribution networks due to the growing integrations of distributed renewable energy resources as well as large loads such as electric vehicle chargers. Such unbalanced voltages introduce significant control challenges as they produce ripples in the controlling signals, impacting the operation of inverters during the unbalanced conditions. Therefore, this paper proposes a controlling algorithm for three-level inverters aimed at suppressing these ripples on controlling signals; improving the overall performance of inverters, and consequently enhancing the fault ride-through capability under unbalanced conditions and faults. The proposed controlling algorithm enables inverters to operate in either a balanced current output mode or a suppressed-ripple active power output mode, depending on the specific event scenario and demands from the grid operators. Current harmonics are suppressed even under severe faults. For improving the voltage balance on the DC capacitors in three-level inverters, an enhanced method of neutral point current prediction is presented. The proposed method ensures higher balancing accuracy through the use of weighted switching costs, avoiding the requirement of a balancing controller or current extrapolation. Simulation and experimental results demonstrate the effectiveness of the proposed controller for reliable grid operation.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12754","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on TOGI-EFLL flux observer for IPMSM sensorless control 用于 IPMSM 无传感器控制的 TOGI-EFLL 磁通量观测器研究

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-08-05 DOI: 10.1049/pel2.12735

Xue Hao, Yutao Luo

引用次数: 0

Front Cover: A comparative analysis of power pulsating buffer architectures for mitigating high-frequency and low-frequency ripple in PV microinverter applications 封面：用于减轻光伏微型逆变器应用中高频和低频纹波的功率脉动缓冲器架构比较分析

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-08-02 DOI: 10.1049/pel2.12758

Writtik Dutta, Connor Reece, Ayan Mallik

引用次数: 0

An enhanced 13-level triple voltage gain switched capacitor inverter with lower power electronics devices 采用更低功率电子器件的增强型 13 级三倍电压增益开关电容器逆变器

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-07-30 DOI: 10.1049/pel2.12748

Masoumeh Derakhshandeh, Majid Hosseinpour, Ali Seifi, Mahdi Shahparasti

{"title":"An enhanced 13-level triple voltage gain switched capacitor inverter with lower power electronics devices","authors":"Masoumeh Derakhshandeh, Majid Hosseinpour, Ali Seifi, Mahdi Shahparasti","doi":"10.1049/pel2.12748","DOIUrl":"https://doi.org/10.1049/pel2.12748","url":null,"abstract":"In this study, a 13-level switched-capacitor inverter with triple voltage gain is proposed. The proposed structure generates 13-level output voltage using only one DC source, eleven switches, and three capacitors. The capacitors have the capability of self-balancing without the use of additional circuits or complex control methods. Additionally, the inrush current of the capacitors has been reduced using a soft charging method. The proposed structure has been compared with different 13-level structures presented in recent studies in terms of various parameters such as the number of semiconductor devices, the number of DC sources, voltage gain, Maximum Blocking Voltage (MBV), and Total standing Voltage (TSV). Another advantage of the proposed structure is the non-use of any diode and its cost-effectiveness. In addition, the power losses of the proposed structure have been evaluated, and its efficiency has been calculated for various output powers. Finally, the performance of the proposed structure has been verified through simulation and laboratory implementation under both stable and various dynamic conditions.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12748","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quasi square wave operation of modular multilevel converter based dual active bridge DC–DC converter with inductor energy recovery 基于模块化多电平转换器的双有源桥 DC-DC 转换器的准方波运行与电感器能量回收

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-07-29 DOI: 10.1049/pel2.12751

Peizhou Xia, Chuantong Hao, Paul Judge, Michael Merlin, Stephen Finney

{"title":"Quasi square wave operation of modular multilevel converter based dual active bridge DC–DC converter with inductor energy recovery","authors":"Peizhou Xia, Chuantong Hao, Paul Judge, Michael Merlin, Stephen Finney","doi":"10.1049/pel2.12751","DOIUrl":"https://doi.org/10.1049/pel2.12751","url":null,"abstract":"The modular multilevel DC–DC transformer (MMDCT) provides a reliable solution to overcome the challenges of conventional dual-active-bridge converters in terms of power semiconductors ratings and dv/dt stress on transformer coupling windings. An alternative modulation method, quasi-square-wave, was proposed to reduce the cell capacitance of modular multilevel bridges. However the application of quasi-square-wave modulation is found to result in underdamped switching transients and losses when resetting energy stored in arm inductance. This paper presents a detailed transient analysis of MMDCT arm insertion based on an equivalent circuit, which contributes to a more accurate component sizing and gives voltage estimation for individual half-bridge submodules. Additionally, a revised switching sequence is proposed to recover this inductor energy and lower the oscillation-related losses. Simulated and experimental results from a scaled test rig of MMDCT are implemented and validate the proposed component sizing and switching sequence, indicating that the converter efficiency can be improved under revised switching sequence. Finally, a silicon carbide based, high-frequency MMDCT is proposed and simulated.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12751","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0