IET Power Electronics最新文献_第10页

Capacitor sizing of three-level neutral point clamped voltage source inverter for electric vehicles: Effects of modulation and motor characteristics 用于电动汽车的三电平中性点箝位电压源逆变器的电容器选型：调制和电机特性的影响

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-03-01 DOI: 10.1049/pel2.12665

Serhat Emir Ogan, Emine Bostanci

{"title":"Capacitor sizing of three-level neutral point clamped voltage source inverter for electric vehicles: Effects of modulation and motor characteristics","authors":"Serhat Emir Ogan, Emine Bostanci","doi":"10.1049/pel2.12665","DOIUrl":"10.1049/pel2.12665","url":null,"abstract":"A three-level neutral point clamped (3L-NPC) voltage source inverter (VSI) topology can be advantageous in electric vehicles with a high DC-link voltage and a high switching frequency. A bulky DC-link capacitor is not an option; thus, the DC-link capacitor's sizing considering the traction system characteristics is an important design step. This paper investigates how the DC-link capacitor size of a 3L-NPC VSI gets affected by the combination of the interdependent characteristics of an electric drive, such as its power factor, modulation index, current, and fundamental frequency, with the effects of the modulation methods. Five pulse width modulation (PWM) methods, of which three of them have an active neutral point potential control, are compared in terms of their neutral point potential (NPP) oscillations. Then, the size of the DC-link capacitor is determined for each PWM method so that the NPP ripple is kept under desired limits at all operating conditions. It is shown that both the modulation technique and the electric machine characteristics influence the capacitor size. For example, electric machine design modifications can introduce more than a 30% reduction in capacitor size. Finally, DC-link and NPP oscillations with different PWM methods are experimentally validated in a scaled-down 3L-NPC inverter.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12665","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140019740","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

Multistage converter with reduced switch voltage stress and diode current stress 可降低开关电压应力和二极管电流应力的多级转换器

IF 2 4区工程技术

IET Power Electronics Pub Date : 2024-02-28 DOI: 10.1049/pel2.12677

M. S. Bhaskar, Umashankar Subramaniam, Dhafer Almakhles, Sivakumar Selvam, M. Muhibbullah

{"title":"Multistage converter with reduced switch voltage stress and diode current stress","authors":"M. S. Bhaskar, Umashankar Subramaniam, Dhafer Almakhles, Sivakumar Selvam, M. Muhibbullah","doi":"10.1049/pel2.12677","DOIUrl":"10.1049/pel2.12677","url":null,"abstract":"The utilization of switched inductors, involving parallel charging and series discharging of inductors, is extensively embraced in diverse DC–DC converters for attaining high voltage gain; nevertheless, the stress on switch voltage and diode current escalates considerably with an increased count of inductors integrated into the switched inductors network. In the classical multistage switched inductor converter, the switch voltage aligns with the output voltage, and the diode experiences a high current as the number of stages increases. This research recommends a DC–DC multistage converter for energy conversion and high voltage gain with low stress. In this paper, a novel multistage switched inductor converter is introduced and designed to attain higher voltage gain while mitigating the stresses on switch voltage and diode current. The proposed circuit is created by replacing the standard multistage switched inductor converter's possible diodes with power switches. All of the switching devices are connected in such a way that the output voltage and input current are shared by all of the switches and diodes, respectively. As a consequence, the voltage stress on switches and the current stress on diodes are comparatively low, resulting in a high efficiency compared to a typical multistage switched inductor converter. It's interesting to note that the proposed converter and a typical multistage switched inductor converter both require the same amount of components. Different operation modes, analysis, a non-ideal model, and a comparison of the suggested and recently constructed converters are discussed. The effectiveness and performance of the circuit are validated experimentally.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12677","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140002194","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 harmonic generation principle of series-connected multi-pulse rectifiers and optimization design method for main transformers 串联多脉冲整流器谐波产生原理及主变压器优化设计方法研究

IF 2 4区工程技术

IET Power Electronics Pub Date : 2024-02-26 DOI: 10.1049/pel2.12632

Quanhui Li, Lei Gao, Fangang Meng

{"title":"Research on harmonic generation principle of series-connected multi-pulse rectifiers and optimization design method for main transformers","authors":"Quanhui Li, Lei Gao, Fangang Meng","doi":"10.1049/pel2.12632","DOIUrl":"10.1049/pel2.12632","url":null,"abstract":"To improve the power density of series-connected multi-pulse rectifiers (MPRs), the harmonic generation principle is studied and the optimization design method for main transformers is proposed. According to the topology of series-connected 18-pulse rectifier, its operation waveforms are analysed, and the Fourier series of the waveforms is obtained. Based on the operation waveforms and its Fourier analysis, the principle for harmonic generation of the rectifier is researched, and the phenomenon of autotransformer cannot be applied to series-connected MPRs is researched. According to the characteristics of the transformer, its vector graphics are analysed. Based on the vector graphics, the optimal structure of the transformer with the highest power density is obtained. The results show that the premise of the normal operation of series-connected MPRs is the potential difference between the neutral points of different secondary windings, and only isolation/semi-isolation transformers meet the requirement; the kilovolt-ampere (kVA) rating of the optimal isolation type transformer is 104.6% pu, and the kVA rating of the optimal semi-isolation type transformer is about 71.23% pu.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12632","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139987621","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 adaptive backstepping control of H-bridge inverter based on type-2 fuzzy optimization of parameters 基于参数 2 型模糊优化的 H 桥逆变器鲁棒自适应反步进控制

IF 2 4区工程技术

IET Power Electronics Pub Date : 2024-02-26 DOI: 10.1049/pel2.12669

Hossein Azarinfar, Mohsen Khosravi, Morteza Zangeneh Soroush, Seyyed Morteza Ghamari

{"title":"Robust adaptive backstepping control of H-bridge inverter based on type-2 fuzzy optimization of parameters","authors":"Hossein Azarinfar, Mohsen Khosravi, Morteza Zangeneh Soroush, Seyyed Morteza Ghamari","doi":"10.1049/pel2.12669","DOIUrl":"10.1049/pel2.12669","url":null,"abstract":"A type-2 fuzzy logic-based adaptive backstepping control (T2FABSC) approach is designed for an H-bridge inverter. This inverter has an LC filter to decrease the level of total harmonic distortion (THD) that can affect the efficiency of the system. Reduction of THD and stability insurance of the filter are challenging trade-offs, tackled here by a controller design. The performance, however, is not suitable for actual applications under a wider range of disturbances, and the parameters need to be adjusted once more for more dependable operations. Backstepping control is given a Lyapunov definition-based adaptive mechanism that can improve this scheme's stability and robustness in the face of numerous disturbances. Additionally, the system is viewed as a “Black box” without the need for a precise mathematical model, which might lead to a lighter computing burden and simpler implementation. Moreover, a fuzzy type-2 structure is adopted that can optimize the gains of the adaptive Backstepping controller (ABSC) in challenging conditions. The antlion optimization algorithm is employed to optimize the parameters of the membership functions in the fuzzy system, hence improving the performance of the controller. In addition, compared with different optimization algorithms, it can more quickly and accurately locate the best solutions. Finally, the findings of both the simulations and the experimental outputs are examined, proving the T2FABSC's significant robustness and faster dynamics in a variety of challenging circumstances.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12669","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139987894","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

A new transformerless buck-boost converter with improved voltage gain and continuous input current 一种新型无变压器降压-升压转换器，具有更好的电压增益和连续输入电流

IF 2 4区工程技术

IET Power Electronics Pub Date : 2024-02-17 DOI: 10.1049/pel2.12671

Majid Hosseinpour, Mahsa Ahmadi, Ali Seifi, Seyed Hossein Hosseini

{"title":"A new transformerless buck-boost converter with improved voltage gain and continuous input current","authors":"Majid Hosseinpour, Mahsa Ahmadi, Ali Seifi, Seyed Hossein Hosseini","doi":"10.1049/pel2.12671","DOIUrl":"10.1049/pel2.12671","url":null,"abstract":"This paper proposes a new transformerless buck-boost converter with an extended voltage conversion ratio. This converter has semi-quadratic voltage gain, which provides more gain with lower duty cycles. This converter has a simple structure and easy implementation, which reduces the cost and increases efficiency. The proposed converter operates in continuous conduction mode and provides two operation modes by turning on and off the switches. The suggested converter has continuous input current and low input current ripple, which is important when utilizing renewable energy sources. The calculation of the proposed converter includes ideal and practical voltage gain, current calculations, voltage stresses of the switches and diodes, current stress of the switches, parameter design, efficiency, and a brief analysis of discontinuous conduction mode and boundary conditions. The proposed converter provides efficiency of about 93.1% in boost mode and 92.14% in buck mode at 50 W output power. The suggested converter varies the input voltage from 20 to 48 V in boost mode and changes the input voltage from 20 to 10.4 V in buck mode. Finally, a laboratory prototype has been built to prove and evaluate the simulation results and theoretical analysis of the proposed converter.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12671","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139902450","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

New multilevel inverter based on reduced switch basic cell for high voltage levels 基于缩小开关基本单元的新型多电平逆变器，适用于高电压等级

IF 2 4区工程技术

IET Power Electronics Pub Date : 2024-02-17 DOI: 10.1049/pel2.12673

Ali Seifi, Seyed Hossein Hosseini, Mehrdad Tarafdar Hagh, Majid Hosseinpour

{"title":"New multilevel inverter based on reduced switch basic cell for high voltage levels","authors":"Ali Seifi, Seyed Hossein Hosseini, Mehrdad Tarafdar Hagh, Majid Hosseinpour","doi":"10.1049/pel2.12673","DOIUrl":"10.1049/pel2.12673","url":null,"abstract":"In this study, to solve total harmonic distortion (THD) and voltage stress on switches, challenges have been made by presenting a new multi-level inverter (MLI). The proposed topology can operate with both symmetric and asymmetric sources. The proposed topology in symmetric and asymmetric mode with 18 switches can produce 17 and 49 voltage levels, respectively, with THD values of 4.14% and 1.45%, which passes the IEEE harmonic standard. The main advantage of the proposed topology is reducing the number of circuit devices, which reduces the price, volume, and complexity of the circuit by reducing the number of circuit devices. The proposed topology reduces the THD, the number of power electronics components, and voltage stress by increasing the output levels. The proposed topology is compared with other topologies and the advantage of the proposed topology is shown in terms of the number of switches and drivers. In addition, the proposed topology is compared in terms of the cost function. The power losses based on the thermal model of the proposed topology have been analysed and simulated. Simulation and experimental results are presented for different scenarios such as load type, load changes, and modulation index changes to validate the proposed topology.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12673","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139902640","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

A fast and structurally simple control scheme based on a fuzzy supervisory approach for wireless power transfer systems 基于模糊监督方法的快速、结构简单的无线输电系统控制方案

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2024-02-17 DOI: 10.1049/pel2.12672

Mohammadreza Kiyani, Seyed Ehsan Abdollahi, Barmak Baigzadehnoe, Seyed Reza Abdollahi

{"title":"A fast and structurally simple control scheme based on a fuzzy supervisory approach for wireless power transfer systems","authors":"Mohammadreza Kiyani, Seyed Ehsan Abdollahi, Barmak Baigzadehnoe, Seyed Reza Abdollahi","doi":"10.1049/pel2.12672","DOIUrl":"10.1049/pel2.12672","url":null,"abstract":"Wireless power transfer (WPT) is a promising technology and has attracted many researchers’ attention due to its inherent advantages such as reliability, safety, flexibility, and low maintenance costs. For WPT systems, the output voltage varies according to the variable loads and the coupling coefficient conditions, affecting system stability and efficiency. In this regard, this study is concerned with the tracking control problem of WPT systems based on fuzzy supervisory proportional–integral (PI) controller and a phase shift modulation technique, which is for the first time proposed by this paper. By introducing appropriate fuzzy rules, the proposed control scheme not only can track the desired output voltage but also has better robust behaviour to deal with the problem of variations of circuit elements and coupling coefficients. That is, the proposed fuzzy supervisory PI control scheme can perform better than the traditional PI controller. Analysis of the designed control method and simulation results validate the superiority of the proposed method over the traditional PI controller in all conditions, which can make it a suitable choice for the applications of electric vehicle charging systems. The analysis is supported by experimental measurements.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12672","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139904276","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

Understanding wind turbine power converter reliability under realistic wind conditions 了解现实风况下风力涡轮机变流器的可靠性

IF 2 4区工程技术

IET Power Electronics Pub Date : 2024-02-16 DOI: 10.1049/pel2.12670

Sermed Alsaadi, Christopher J. Crabtree, Peter C. Matthews, Mahmoud Shahbazi

引用次数: 0

A soft switched step-up DC–DC converter using a low-power auxiliary circuit and continuous input current 使用低功耗辅助电路和连续输入电流的软开关升压型 DC-DC 转换器

IF 2 4区工程技术

IET Power Electronics Pub Date : 2024-02-14 DOI: 10.1049/pel2.12675

Hossein Ardi, Ali Ajami

{"title":"A soft switched step-up DC–DC converter using a low-power auxiliary circuit and continuous input current","authors":"Hossein Ardi, Ali Ajami","doi":"10.1049/pel2.12675","DOIUrl":"10.1049/pel2.12675","url":null,"abstract":"In this paper, a new high step-up DC–DC converter is presented. The presence of an inductor at converter input reduces input current ripple. Furthermore, a coupled inductor with a voltage multiplier cell is also implemented to increase the voltage gain of the converter. The stored energy in leakage inductance of coupled inductor is recycled by a clamp circuit which increases efficiency and clamps voltage on power switch. The power switch is turned on and off under soft switching condition. The soft switching is also applied to auxiliary switch. All diodes are turned off under zero current condition which causes reverse recovery problem to be alleviated. A very low current flows through auxiliary components in a very short time. Therefore, a very low conduction loss is added to the converter by an auxiliary circuit. Soft switching condition is almost independent of specifications of circuit, especially the output power. Steady-state analysis of the proposed converter is discussed. Finally, to verify the performance and validation of the proposed converter, laboratory results for a prototype with input voltage 30 V, output voltage 240 V, output power 220 W and switching frequency 50 kHz are presented and the results are discussed. The efficiency of the prototype converter at nominal power is 96%.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12675","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139753082","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

Soft ferrite 3D printing of magnetic couplers of inductive power transfer systems 软铁氧体 3D 打印电感式功率传输系统的磁耦合器

IF 2 4区工程技术

IET Power Electronics Pub Date : 2024-02-13 DOI: 10.1049/pel2.12668

Meilin Hu, Udaya Kumara Madawala, Olaf Diegel

{"title":"Soft ferrite 3D printing of magnetic couplers of inductive power transfer systems","authors":"Meilin Hu, Udaya Kumara Madawala, Olaf Diegel","doi":"10.1049/pel2.12668","DOIUrl":"https://doi.org/10.1049/pel2.12668","url":null,"abstract":"Traditional soft ferrite manufacturing is limited to simple geometries and materials, while 3D printing offers greater flexibility for complex designs. Notably, soft ferrites are crucial for magnetic couplers (pads) in inductive power transfer (IPT) systems to achieve efficient wireless power transmission. The adoption of soft ferrite 3D printing in IPT systems could lead to significantly improved magnetic coupler design, yet research in this area is limited. Hence, the paper first makes a comprehensive comparison of the existing soft ferrite 3D printing methods to ascertain their suitability for magnetic couplers in IPT systems, and then proposes the binder jetting (BJT) as a potential 3D printing approach that could be appropriate for IPT magnetic coupler implementation being versatile, cost-effective, and suitable for large-scale manufacturing with high precision. This paper explores the suitability of BJT by 3D printing toroid cores with Mn–Zn ferrite powder under different sintering temperature profiles. Experimental results are presented to show that toroid cores can be 3D printed with high printing precision, mechanical strength, and a relative permeability of 10. This paper also highlights the impact of sintering temperature on 3D-printed cores, the challenges, limitations, and future research directions of soft ferrite 3D printing for IPT magnetic couplers by the BJT method.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139753201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0