IET Power Electronics最新文献

Effect of Parasitic Components in Voltage Drop and Design Consideration of the Switched Impedance Inverter

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-04-05 DOI: 10.1049/pel2.70024

Mohsen Hasan Babayi Nozadian, Dmitri Vinnikov, Hamed Mashinchi Maheri

{"title":"Effect of Parasitic Components in Voltage Drop and Design Consideration of the Switched Impedance Inverter","authors":"Mohsen Hasan Babayi Nozadian, Dmitri Vinnikov, Hamed Mashinchi Maheri","doi":"10.1049/pel2.70024","DOIUrl":"https://doi.org/10.1049/pel2.70024","url":null,"abstract":"This paper investigates the impact of parasitic elements on the performance of switched impedance inverters. This work develops a non-ideal impedance source inverter model, enabling more accurate predictions of voltage gain, current relationships, and overall converter behaviour under practical operating conditions. By quantifying the influence of parasitic components on key parameters such as voltage, current, and component selection, this research provides valuable insights for optimising the design of switched impedance inverters. Furthermore, the reliability modelling highlights the sensitive elements in the operation of the inverter. The analysis examines power transfer characteristics within the inverter bridge, considering both zero and non-zero states, and investigates the impact of switching frequency, output frequency, and duty cycle on the DC-link current. Experimental results validate the findings, demonstrating the practical significance of considering parasitic elements in the design and optimisation of switched impedance inverters. By improving the accuracy of theoretical predictions, this research contributes to reducing experimental iterations, minimising costs, and mitigating the risk of encountering unforeseen issues during the development and implementation of these converters.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778374","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

Optimised Operations and Modulation Scheme for Simplified Seven-Level Hybrid-Clamped Converters

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-04-02 DOI: 10.1049/pel2.70028

Mingzhe Wu, Jun Hao, Jiazhe Li, Qi Zhang, Yanyong Yang, Kehu Yang

引用次数: 0

Transient Current Sharing Method for Parallel SiC MOSFETs Based on Gate-Source Voltage Difference

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-04-01 DOI: 10.1049/pel2.70030

Hao Pan, Haichuan Zhou, Zhen Wang, Yufeng Zhao, Limin Jia

{"title":"Transient Current Sharing Method for Parallel SiC MOSFETs Based on Gate-Source Voltage Difference","authors":"Hao Pan, Haichuan Zhou, Zhen Wang, Yufeng Zhao, Limin Jia","doi":"10.1049/pel2.70030","DOIUrl":"https://doi.org/10.1049/pel2.70030","url":null,"abstract":"In the design of high-power converters, significant parameter dispersion among different SiC MOSFET devices can cause substantial current differences during switching when devices are directly paralleled. To address this issue, a method is proposed to suppress transient current imbalance based on gate-source voltage compensation. First, the impact mechanism of threshold voltage differences on transient current imbalance during the switching of parallel SiC MOSFETs is analysed, and the role of gate-source voltage differences in current sharing is explored. The proposed method introduces a gate current extraction structure during the on-state and a current injection structure during the off-state to generate gate-source voltage differences between two devices, thereby eliminating the current differences caused by inconsistent device turn-on sequences. Compensation parameters are determined by analysing the mathematical model of gate-source voltage differences during switching transients. Finally, simulation analysis and experimental tests using LTspice simulation software and a parallel double-pulse test platform demonstrate that the proposed current sharing method significantly improves transient current imbalance between parallel devices.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749519","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

An Optimized Loss-Balancing Modulation Strategy for ANPC-3L Inverter

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-04-01 DOI: 10.1049/pel2.70029

Kefeng Li, Guijing Xue, Fei Xiao, Jilong Liu, Zhuangzhi Dai, Zhiqin Mai

{"title":"An Optimized Loss-Balancing Modulation Strategy for ANPC-3L Inverter","authors":"Kefeng Li, Guijing Xue, Fei Xiao, Jilong Liu, Zhuangzhi Dai, Zhiqin Mai","doi":"10.1049/pel2.70029","DOIUrl":"https://doi.org/10.1049/pel2.70029","url":null,"abstract":"In existing modulation strategies for active neutral-point-clamped three-level (ANPC-3L) inverters, high-frequency and low-frequency switches are separated, with loss mainly concentrated in some fixed high-frequency operating switches, resulting in uneven loss distribution across switches among bridge arms. To address these issues, a loss-balance optimization modulation strategy is proposed. In this paper, the loss distribution of power switches under different commutation paths is analysed, and a loss-estimation model for switches is established based on the characteristics of power switches to quantify the total losses. Aimed at loss balancing for all power switches, the switching modes (commutation paths) in the modulation process are automatically selected by the proposed strategy, achieving relatively balanced losses among all switches. Experiments are carried out with an 18 kW three-phase ANPC-3L inverter. Compared with existing loss-balance strategies, the proposed strategy shows better loss (temperature) balance performance and almost equal efficiency.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741273","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

FEA-Based Optimisation of an Inserted-Shunt Integrated Planar Transformer for a Bidirectional CLLLC Resonant Converter

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-29 DOI: 10.1049/pel2.70014

Sajad A. Ansari, Jonathan N. Davidson, Martin P. Foster

引用次数: 0

Pareto-Based Design Optimisation of Hybrid Energy Storage Systems for Full-Electric Vessels

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-29 DOI: 10.1049/pel2.70027

Rene A. Barrera-Cardenas, Salvatore D'Arco, Luigi Piegari, Pietro Tricoli

{"title":"Pareto-Based Design Optimisation of Hybrid Energy Storage Systems for Full-Electric Vessels","authors":"Rene A. Barrera-Cardenas, Salvatore D'Arco, Luigi Piegari, Pietro Tricoli","doi":"10.1049/pel2.70027","DOIUrl":"https://doi.org/10.1049/pel2.70027","url":null,"abstract":"Full electric vessels can benefit from hybrid energy storage systems (HESS) that combine two storage technologies of different characteristics in terms of power and energy density. The optimal design of a HESS for a vessel is generally a rather complex multivariable optimization with several degrees of freedom and constraints. Indeed, the optimization should account for the operational characteristics of the storage units, including their progressive aging. Moreover, the sizing of the storage units is tightly linked to the strategy implemented in the energy management system (EMS) for allocating the power needed by the load to the storage units. This paper presents a two-stage Pareto-based design optimization procedure for HESS intended for a full-electric vessel. The methodology first identifies a Pareto front as the set of all the optimal configurations in terms of capacity of the two storage units that fulfil the operational constraints within a large discrete configuration space. These constraints account for capacity degradation and limitations in power and energy. The degrees of freedom in the EMS are included in the configuration space. A second stage identifies the optimal configuration on the Pareto front based on a defined cost function. The approach decouples the analysis of the solutions that can fulfil the operational constraints from the optimization and can be very effective in exploring the effect of several alternative cost functions on the optimal solution. Moreover, the shape of the Pareto front can offer a visual clue to the benefits offered by a hybrid storage compared to a single technology solution and on the optimization margins. The procedure is illustrated with a case of a full electric tugboat highlighting when a HESS can be beneficial and how the optimal design can be facilitated.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726793","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

Optimized Phase-shift Tuning via Equivalent Small Parameter Modeling for Ripple Reduction in Asymmetric Parallel Multi-Module DC-DC Converters

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-26 DOI: 10.1049/pel2.70025

Xiuyun Zhang, Guidong Zhang, Samson S. Yu, Zhenyu Yi

{"title":"Optimized Phase-shift Tuning via Equivalent Small Parameter Modeling for Ripple Reduction in Asymmetric Parallel Multi-Module DC-DC Converters","authors":"Xiuyun Zhang, Guidong Zhang, Samson S. Yu, Zhenyu Yi","doi":"10.1049/pel2.70025","DOIUrl":"https://doi.org/10.1049/pel2.70025","url":null,"abstract":"In photovoltaic power generation applications, multiple low-voltage PV modules must be boosted and connected in parallel for high power output. However, due to the variability of PV energy input, the parallel DC-DC converter modules often operate under asymmetric conditions, which deteriorates bus voltage ripple and reduces system stability and component lifespan. To address these issues, this paper proposes an optimal phase-shift modulation method with asymmetric phase shifts to effectively suppress the ripples at the point of common coupling of parallel-connected converters. To do so, a model for the output voltage ripple of boost and buck–boost parallel converter is established using the equivalent small parameter method (ESPM) with the optimal phase-shift angle determined by this modulation approach. Furthermore, a triple-loop current-sharing control strategy is implemented to ensure current sharing among the modules, enhancing the overall ripple suppression capability of the proposed modulation technique. Simulation and experimental results indicate that this integrated approach significantly improves the performance and stability of parallel converter systems.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707266","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 Combined Compensation Strategy for Steady-State Performance Improvement of Proportional-Proportional-Delay Controller

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-26 DOI: 10.1049/pel2.70022

Di Wu, Yan Fu, Mingming Li, Luoming OuYang

{"title":"A Combined Compensation Strategy for Steady-State Performance Improvement of Proportional-Proportional-Delay Controller","authors":"Di Wu, Yan Fu, Mingming Li, Luoming OuYang","doi":"10.1049/pel2.70022","DOIUrl":"https://doi.org/10.1049/pel2.70022","url":null,"abstract":"Within control system architectures, the proportional-proportional-delay (PPD) controller is theoretically characterized by enhanced dynamic responsiveness, a streamlined control structure, and reduced computational demands. Nevertheless, this control strategy demonstrates heightened dependence on system model accuracy coupled with compromised robustness, thus imposing significant constraints on its practical deployment in industrial control scenarios. To improve steady-state control performance of the PPD controller against circuit parameters variations, this paper investigates quantity relationships between circuit parameters variations and grid current amplitude changes first, and a dominant factor and some minor factors affecting the grid current are found out successfully. As a result, linear control of the PPD controller against model parameters changes has been proposed based on a linear function. Meanwhile, an integral controller composed has been integrated into the control strategy to eliminate the residual steady-state error of the proposed linear controller. Finally, a combined control structure with both linear and integral controllers has been proposed, and experimental results have been presented to verify the correctness and effectiveness of the combined control.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698911","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

Finite Control Set Model Predictive Control Strategy for MMC Arm Current With DC Bus Voltage Stabilization Under Unbalanced Grid Conditions

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-19 DOI: 10.1049/pel2.70023

Xiaobing Niu, Runze Qiu, Jingwei Zhu, Xin Chow

引用次数: 0

Control Strategy for Modular-Structured Series-Resonant Converters: Unifying Pulse-Density Modulation and Phase-Shift Control

IF 1.7 4区工程技术

IET Power Electronics Pub Date : 2025-03-13 DOI: 10.1049/pel2.70020

Pavlo Herasymenko, Sergii Usenko, Bogdan Yarmolenko, Viktor Gurin

{"title":"Control Strategy for Modular-Structured Series-Resonant Converters: Unifying Pulse-Density Modulation and Phase-Shift Control","authors":"Pavlo Herasymenko, Sergii Usenko, Bogdan Yarmolenko, Viktor Gurin","doi":"10.1049/pel2.70020","DOIUrl":"https://doi.org/10.1049/pel2.70020","url":null,"abstract":"The study proposes an advanced control technique for modular-structured series-resonant converters, unifying pulse-density modulation (PDM) and phase-shift control to mitigate output current amplitude fluctuations. Series-resonant converters, widely utilised for their efficiency in various applications, typically employ PDM to achieve zero-voltage and quasi-zero-current switching, minimising switching losses. However, these converters often encounter challenges with amplitude fluctuations in the output current, particularly during deep current regulation, which can compromise performance and lead to increased electromagnetic interference and overvoltage issues. The presented control strategy combines PDM with phase-shift control, significantly reducing these fluctuations and maintaining higher minimum peak currents. This unified approach ensures greater stability and efficiency in the converter's operation. Detailed experimental validation confirms the theoretical benefits, highlighting the proposed method's superiority over traditional PDM control techniques in achieving stable and efficient converter performance.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602627","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