IET Power Electronics最新文献

{"title":"Study on gate-source voltage oscillation suppression in SiC MOSFETs based on LCR parallel branch","authors":"Changzhou Yu,&nbsp;Jiajia Li,&nbsp;Yukun Gu,&nbsp;Huixian Liu,&nbsp;Feng Xu,&nbsp;Yifei Wang,&nbsp;Shaolin Yu","doi":"10.1049/pel2.12714","DOIUrl":"https://doi.org/10.1049/pel2.12714","url":null,"abstract":"<p>Silicon carbide (SiC) MOSFETs are garnering widespread attention due to their superior performance in high-temperature, high-frequency, and high-voltage applications, emerging as the preferred power semiconductor devices in converters for photovoltaic power generation and new energy vehicles. However, SiC MOSFETs are prone to gate drive and drain-source voltage oscillations during high-speed switching events, resulting in diminished system efficiency, increased electromagnetic interference, reduced device safety, and even compromising the overall reliability of the converter. This paper introduces an oscillation suppression method based on a gate LCR parallel branch, aimed at optimizing the switching performance of SiC MOSFETs. A half-bridge circuit model based on SiC MOSFET is established, and the mechanism of gate and drain-source oscillation is meticulously analysed using the transfer function expression. Building upon this, the LCR parallel branch parameters are meticulously designed to introduce appropriate damping in the gate drive path, effectively mitigating oscillations. Experimental results demonstrate that the proposed design not only significantly reduces the amplitude of oscillations but also shortens the switch-transition time. This enhancement effectively increases the switching frequency and reduces switching losses.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12714","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142152288","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}

{"title":"A triple-LC-based DC/DC converter with wide input voltage gain in both under-resonance and over-resonance frequency regions","authors":"Chunguang Ren,&nbsp;Yue Qin,&nbsp;Jiansheng Kong,&nbsp;Xinqi Li,&nbsp;Yue Hui,&nbsp;Xiaoqing Han,&nbsp;Xiangning He","doi":"10.1049/pel2.12731","DOIUrl":"https://doi.org/10.1049/pel2.12731","url":null,"abstract":"<p>In recent years, wide voltage range DC/DC converters have been widely used in telecom power, solar generation and electric vehicle charger applications. Based on this, a new multi-resonant converter with wide input voltage is proposed here. Compared with the traditional LLC converter, the proposed converter can maintain the output voltage within a narrow frequency regulation range in both under-resonance and over-resonance areas. Thus, a wide voltage range can be realized without additional switch components or complex control strategies. The topology and the corresponding working principle of the proposed converter are introduced. In addition, the equivalent model by considering the fundamental wave is established and the influence of the resonance parameters on the voltage gain characteristic is analysed in detail. With these considerations, the resonance parameters are designed. Finally, a 500 W experiment platform is established to verify the effectiveness and feasibility of the proposed converter.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12731","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596213","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}

{"title":"Modelling, design and control of power electronic converters for smart grids and electric vehicle applications","authors":"Mahalingam Prabhakar,&nbsp;Fernando Lessa Tofoli,&nbsp;Mohammed A. Elgendy,&nbsp;Huai Wang","doi":"10.1049/pel2.12715","DOIUrl":"https://doi.org/10.1049/pel2.12715","url":null,"abstract":"<p>The electrical energy sector is currently experiencing an interesting and paradigm shift due to recent rapid technological developments. Such developments are predominantly related to renewable energy, smart grids, energy storage and electric vehicles. There is a strong technical connection between all the above-mentioned fields. For instance, the penetration of renewable energy coupled with energy storage facilities and suitably controlled through appropriate communication protocols paves the way for realizing a smart grid. The swift progress and adoption of electric vehicle by various entities proves to be a boon for all the stake holders involved. Soon, with the proliferation of electric vehicles, interesting and challenging interactions between the electric vehicle and the smart grid are expected. Power electronic converters play a pivotal role in the smooth and coordinated functioning of all the four above-mentioned applications. The current Special Issue focuses on “Modelling, Design and Control of Power Electronic Converters for Smart Grids and Electric Vehicle Applications.”</p><p>In this Special Issue, we received thirty-one papers, all of which were peer reviewed. Of the thirty-one originally submitted papers, twelve papers have been accepted, six were “rejected with referral” since they did not meet the criteria to be considered for the IET Power Electronics Special Issue. However, considering their quality, they were referred for possible publication in another journal. Thus, the success of this Special Issue is well-appreciated through the quality of submissions.</p><p>The twelve accepted papers are grouped under three main categories viz., DC microgrid and smart grid applications, electric vehicle (EV) and motors drive applications, and power system applications. The papers clustered under the first category present high gain DC-DC converters with attractive features which are preferred for DC microgrid and smart grid applications. Four papers have been grouped under this category. There are four papers which discuss the role of power converters for EV and motor drive applications which is the second group. Two papers discuss the converters employed for EV battery charging along with suitable control techniques. The third category is based on the power converters employed for power system applications. There are four accepted papers which deal with the application.</p><p><b>Mahnaz Izadi</b> et al. present an improved coupled inductor-based high gain DC-DC converter. The switch employed in the converter is subjected to minimal overshoot due to the clamp circuit which recycles the energy stored in the leakage inductance. The proposed converter operates with a full-load efficiency of 95.5% and yields a voltage conversion ratio of 10. Due to its beneficial features, the proposed converter is suitable to integrate low-voltage DC sources to the consumers and/or DC networks.</p><p><b>Mostafa Karimi Hajiabadi</b> et al. discuss a high st","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12715","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141537054","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}

{"title":"Experimental validation of magnetic control strategy in LCC-S compensated wireless power transfer systems","authors":"Luigi Solimene,&nbsp;Fabio Corti,&nbsp;Salvatore Musumeci,&nbsp;Francisco Javier López-Alcolea,&nbsp;Alberto Reatti,&nbsp;Carlo Stefano Ragusa","doi":"10.1049/pel2.12718","DOIUrl":"https://doi.org/10.1049/pel2.12718","url":null,"abstract":"<p>The paper explores the use of the magnetic control strategy for the output power regulation of an LCC-S compensated inductive wireless power transfer system. The magnetic control is implemented through a controlled variable inductor whose magnetization state is actively regulated by an auxiliary DC–DC converter. The principles for the design and regulation of the system are discussed, and the experimental setup for the validation of the regulation method is implemented. Several measurement results highlight the effectiveness and potential improvements of the magnetic control strategy for inductive wireless power transfer systems.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12718","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141488166","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}

{"title":"Data-driven predictive control of perturbed buck converters using a modified iterative feedback tuning algorithm","authors":"Kamran Moradi,&nbsp;Pourya Zamani,&nbsp;Qobad Shafiee","doi":"10.1049/pel2.12720","DOIUrl":"https://doi.org/10.1049/pel2.12720","url":null,"abstract":"<p>The most challenging aspect of utilizing model predictive controllers (MPCs), particularly those involving power electronic applications, is the extraction of a model that accurately represents the behavior of the studied system. Concerning the use of power electronic applications, as long as an MPC is used, adjusting the controller parameters brings difficulties. In addition, as the number of elements increases, it becomes harder to get the best control law out of the model. To do away with the need for model extraction, this study presents an offline data-driven approach in conjunction with the MPC that can optimally adjust the MPC parameters based on the iterative feedback tuning (IFT) algorithm called the iterative feedback predictive controller (IFPC). The proposed method eliminates concerns regarding selecting an optimal number of algorithm iterations, thereby reducing operating costs, by introducing a modified IFT called feedback-based IFPC (FIFPC) while simultaneously achieving optimal MPC parameters. The proposed method is applied to a constant voltage load (CVL) connected less-than-ideal buck converter, that is, one with perturbed filter elements and variable loads. A robust stability analysis (RSA) is performed under normal operating conditions to investigate the robustness behavior of the proposed controller. Simulation studies are presented to evaluate the proposed controller under different scenarios, such as step and abrupt load changes and measurement noise, compared with the well-known model-based and data-enabled predictive controller (DeePC) approaches in the MATLAB/Simulink environment.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12720","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967294","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}

{"title":"Interleaved ZVS DC-DC converter with ultrahigh step-down and flexible gain","authors":"Wahid Eskandary,&nbsp;Mohammad Monfared,&nbsp;Ali Nikbahar,&nbsp;Ahmad Mahdave","doi":"10.1049/pel2.12730","DOIUrl":"https://doi.org/10.1049/pel2.12730","url":null,"abstract":"<p>This paper proposes a novel non-isolated ultrahigh step-down interleaved DC-DC converter with an extremely extended duty cycle based on the series capacitor and coupled-inductor techniques. The proposed converter utilizes a three-winding coupled inductor (TWCI) to enhance the step-down conversion ratio. In contrast to conventional coupled inductor-based step-down converters, its voltage gain improves as the turn ratio approaches unity. Consequently, coupled inductors have significantly lower winding losses. Furthermore, there is no extra constraint on the turn ratio of the TWCI. It results in a highly flexible voltage gain and more design freedom. Other advantages of the employed series capacitor and coupled inductor techniques can be listed as, zero voltage switching (ZVS) condition for all switches, significant reduction of the total switching device power (SDP) and recovery of the energy of leakage inductors. They all reduce power losses and costs. Steady-state analysis, derivation of voltage gain and design considerations are discussed in detail. Finally, a 200 W, 400-to-12 V experimental prototype is implemented to verify the effectiveness and feasibility of the proposed converter.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12730","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596301","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}

{"title":"A capacitance reduction modulation approach of hybrid modular multilevel converter with boosted modulation index and circulating current injection","authors":"Hongxu Li,&nbsp;Qin Wang,&nbsp;Qunfang Wu,&nbsp;Lan Xiao,&nbsp;Jinbo Li,&nbsp;Qi Chen","doi":"10.1049/pel2.12729","DOIUrl":"https://doi.org/10.1049/pel2.12729","url":null,"abstract":"<p>In a modular multilevel converter (MMC) system, the sub-module capacitors account for a large proportion of the cost, volume, and weight. This paper proposed a method to reduce the total capacitance of MMC based on the combination of boosting the modulation index (<i>m</i>) and second-harmonic circulating current injection (SCCI). A small amount of full-bridge sub-modules was added to conventional half-bridge sub-modules (HBSM) based MMC to form the hybrid MMC. The third-harmonic voltage injection technology was used to increase the <i>m</i> of hybrid MMC without the common-mode voltage injected on the ac-side. An optimized SCCI method determined by <i>m</i> was introduced, which limited the root mean square (RMS) of arm current. An improved modulation approach is used to eliminate the coupling effect of third-harmonic voltage injection and SCCI in boosting <i>m</i>, ensuring that the <i>m</i> increases to 1.15 with the optimized SCCI. Compared with conventional HBSM-MMC, the proposed method reduced the total capacitance by approximately half when <i>m</i> = 1.15. A comprehensive comparison of different capacitance reduction methods was presented to demonstrate the cost and effect. Simulation and experiment verified the proposed method.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12729","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596300","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}

{"title":"Torque ripple suppression in non-commutation interval of the coreless brushless DC motor based on unipolar PWM predictive control","authors":"Chong Zeng,&nbsp;Zhongxin Wan,&nbsp;Song Huang,&nbsp;Jiao He","doi":"10.1049/pel2.12719","DOIUrl":"https://doi.org/10.1049/pel2.12719","url":null,"abstract":"<p>Aiming at the torque ripple caused by significant current ripple and non-ideal back-electromotive force (back-EMF) of coreless brushless DC motor (BLDCM), an incremental predictive control strategy based on unipolar pulse width modulation (PWM) is proposed in the non-commutation interval. Firstly, the unipolar PWM scheme is used to double the current ripple frequency, which can reduce the current ripple. On this basis, the current prediction equations of adjacent control periods are subtracted to obtain the incremental current prediction equation, and the influence of non-ideal back-EMF on torque ripple suppression is eliminated. Finally, combined with the author's previous research on the commutation torque ripple suppression strategy, an integrated suppression strategy for non-commutation and commutation interval is proposed. The experimental results show that, compared with the PI control strategy, the total torque ripple of the proposed strategy is reduced to less than 35%, and the current ripple is reduced. Meanwhile, the commutation time is shortened, and the advantages of coreless motor rapid response are retained. The strategy is universal, not limited by motor parameters and operating conditions, and has theoretical and engineering value.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12719","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359819","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}

{"title":"Extended high gain DC-DC converter with switched-inductors, switched-capacitors and soft-switching: Analysis and implementation","authors":"Pravat Biswal,&nbsp;Veera Venkata Subrahmanya Kumar Bhajana,&nbsp;Atif Iqbal,&nbsp;Vijay Kakani,&nbsp;Madhuchandra Popuri","doi":"10.1049/pel2.12711","DOIUrl":"https://doi.org/10.1049/pel2.12711","url":null,"abstract":"<p>This paper proposes an extended DC-DC converter with high voltage conversion ratio and soft-switching ability. The proposed converter has active switched-inductors, switched-capacitors included in the conventional high gain converter and operates in continuous conduction mode (CCM). Simple auxiliary resonant elements are added on the primary leg of the converter to provide design freedom for soft-switching operation. The significant merits of the proposed converter are lesser voltage and current stresses, high voltage gain with reduced component count and better efficiency. Additional feature of this converter is soft-switching operation under different load conditions and duty ratios without considerably increasing stresses. The zero voltage switching (ZVS) turn-on operation is obtained for all switching devices. Therefore, switching power losses are minimized greatly. This paper presents the description, principles of operation and steady state analysis in comparison with the existing high gain converters. The theoretical analysis is verified with a 350 W prototype operated at input is 20 V and output is 220 V. The overall efficiency achieved is 96.7%. The obtained results confirm ZVZCS operation at full load.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12711","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021748","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}

{"title":"Electromagnetic field coupled circuits and open-loop control of fast starting processes in induction motors","authors":"Huixian Zhang,&nbsp;Kunlun Zhang,&nbsp;Nan Xu,&nbsp;Cheng Luo","doi":"10.1049/pel2.12728","DOIUrl":"10.1049/pel2.12728","url":null,"abstract":"<p>To solve the problems of difficulty in speed measurement and low accuracy of speed measurement of induction motor (IM) during fast starting, the electromagnetic field coupling circuit (EFCC) and open-loop control of IM considering rapid speed change are proposed. First, the EFCC of IM is established through the stator circuit, air gap magnetic field circuit and rotor circuit, and the stator voltage and electromagnetic torque of the fast starting process are deduced from the air gap magnetic density on the basis of constant slip angular velocity, and then the open-loop control method based on the EFCC is given. Finally, compared with the open-loop control based on the TEC, the results of simulation and experiment show that the open-loop control based on the EFCC can follow the acceleration starting more quickly and the starting current is smaller, which is conducive to reducing the cost of the drive.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12728","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141361270","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}