IET Power Electronics最新文献

{"title":"A parameter design method of LC filter circuit for closed-loop dynamic power supply system based on linear power amplifier","authors":"Feixiang Yang,&nbsp;Xueqing Wang,&nbsp;Jin Luo,&nbsp;Qianwen Duan,&nbsp;Zongqi Ning,&nbsp;Yao Mao","doi":"10.1049/pel2.12743","DOIUrl":"10.1049/pel2.12743","url":null,"abstract":"<p>The linear power amplifier (LPA) suffers from low power supply utilization in the DC power supply mode, leading to reduced output efficiency. This paper constructs an efficient power supply mode based on closed-loop dynamic power supply system (CLDPSs). The CLDPSs can generate a pair of bipolar dynamic power supplies based on a predetermined signal to provide power to LPA, which can maintain a small voltage drop between the power supply and the output of LPA, thereby improving the power supply utilization of LPA. In addition, the study also focuses on the conflicting relationship between the output ripple and the dynamic performance of the CLDPSs, for which a new parametric design of the LC filter circuit is proposed, aiming to achieve a balance between these two aspects. Finally, a voice coil motor driving platform is constructed for experimental testing. The results demonstrate that the output ripple and dynamic performance of the CLDPSs can be balanced. In comparison to the DC power supply mode, the CLDPSs power supply mode can enhance the efficiency of LPA by 2 times while the driving accuracy of voice coil motor is basically unchanged.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12743","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141713857","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":"Interoperable square‐circular coupled coils for wireless electric vehicle battery charging system with different misalignments","authors":"Charan Singh Banothu, Srinivasa Rao Gorantla, R. Attuluri, G. Evuri","doi":"10.1049/pel2.12742","DOIUrl":"https://doi.org/10.1049/pel2.12742","url":null,"abstract":"A substantial interest in inductive power transfer (IPT) is due to its straight forwardness and dependability in charging electric vehicle (EV) batteries for researchers. The mutual inductance (MI) plays a critical role in the IPT system as it enables efficient power transfer. Therefore, it is imperative to examine the MI between the two coils that are connected through inductive coupling. This work investigates the MI and efficiency of connected coils in interoperable conditions. The transmitter coil is arranged in the shape of a square (TxS), whereas the reception coil is arranged in the shape of a circle (RxC). A concise and user‐friendly collection of design guidelines for S‐S compensated resonant inductive power transfer (SS‐RIPT) systems the design concepts efficiently mitigate the possibility of systematically and unambiguously setting the specifications for a given load profile. A 3.6‐kW setup has been constructed and validated by finite element analysis and experimental testing, following the design specifications. The availability of suitable testing equipment in the laboratory influenced the choice of a resonance frequency and output voltage for a 3.6 kW system.","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141690180","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}

{"title":"An RC snubber design method to achieve optimized switching noise-loss trade-off of cascode GaN HEMTs","authors":"Peng Xue,&nbsp;Eckart Hoene,&nbsp;Pooya Davari","doi":"10.1049/pel2.12741","DOIUrl":"10.1049/pel2.12741","url":null,"abstract":"<p>The cascode gallium nitride high electron mobility transistors (GaN HEMTs) are very vulnerable to self-sustained turn-off oscillation due to their cascode configuration. This paper presents a design approach for the RC snubber of cascode GaN HEMTs to achieve the optimized noise-loss trade-off. At first, an analytical model is proposed to describe the instability of cascode GaN HEMTs-based test circuits utilizing RC snubber. Based on the model, an analytical approach is proposed to achieve two optimum RC snubber designs S1 and S2. The design S1 can satisfactorily dampen the oscillation with minimum switching losses. The design S2 achieves maximum effective damping on the oscillation at a minimized cost of additional power losses. In the end, the accuracy of the proposed model is validated by the double-pulse test and good agreement is obtained.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12741","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141704368","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, control, and implementation of advanced isolated DC/DC converters for renewable energy applications","authors":"Yuqi Wei,&nbsp;Quanming Luo,&nbsp;Di Mou,&nbsp;Shuang Zhao,&nbsp;Marco Liserre,&nbsp;H. Alan Mantooth","doi":"10.1049/pel2.12737","DOIUrl":"10.1049/pel2.12737","url":null,"abstract":"<p>Demand for high-efficient isolated DC/DC converters to achieve energy transfer among renewable energy sources, energy storage elements, and loads is increasing because of renewable energies’ increasing market penetration. Traditional converters pose significant challenges due to the wide voltage range operation nature of these components. Interest in improving the power converters’ performances for renewable energy applications is growing rapidly. Researchers are exploring accurate analysis methods, optimal design, and novel control strategies to improve the power converters’ performance. These strategies can improve the converters’ performance without any modifications to the traditional hardware. In addition, design automations are drawing more and more attention. By introducing new control strategy, the converter performance over a wide voltage range can be significantly improved. Furthermore, novel topology is another effective approach to cover wide voltage gain range operation.</p><p>From the power converter application perspective, stability, reliability, and fault tolerant operation are of great importance. The existing literature still lacks simple yet effective small signal models for those popular isolated DC/DC converters. Stability and reliability analyses are required to ensure safe operation of the system. This Special Issue published original research related to modelling, design, control, and implementation of advanced isolated DC/DC converters for renewable energy applications with improved performance.</p><p>In this Special Issue, we have received seventeen papers, all of which underwent peer review. The overall submissions were of high quality and all of them have been accepted.</p><p>Zhou et al. present a two-phase interleaved LLC converter with reduced switch count and precise current balancing by using switching-control-capacitor (SCC) technology. At the same time, the design of the SCC circuit parameters is given to reduce the SCC circuit voltage stress. To verify the proposed method, a 2.16 kW GaN-based two-phase interleaved SCC-LLC converter is established. The experimental results show that this method achieves excellent current sharing under all the tolerance conditions with cheap ceramic capacitor.</p><p>Zhou et al. explore solutions to address the voltage ringing issue across the synchronous rectifier switches (SRs) in low voltage dc-dc converters (LDCs) used in electric vehicles (EVs). The paper proposes an accurate ringing model for LLC resonant converters and a simple, lossless, and low-cost filter circuit to eliminate the negative effects of voltage ringing. The theoretical analysis is validated by simulated and experimental results, and the SR works efficiently and reliably with the proposed method at high load current.</p><p>Luo et al. introduce a method using multiple coil branches instead of a whole large coil to solve thickness problem and save space in the inductive power transfer (IPT). The paper analyz","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12737","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141696502","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":"Energy injection adaptive technology for wireless power transmission based on parameter identification","authors":"Zhe Li,&nbsp;Lijuan Li","doi":"10.1049/pel2.12736","DOIUrl":"https://doi.org/10.1049/pel2.12736","url":null,"abstract":"<p>This paper presents an innovative adaptive strategy implemented in wireless power transmission (WPT) systems to overcome efficiency challenges due to coupling structure misalignment and load variability. A novel versatile transmitter, capable of alternating between single and dual voltage source states via two MOSFETs has been designed. Initially, the system operates in a single voltage source mode, mutual inductance and load characteristics are pinpointed using a particle swarm optimization algorithm. Subsequently, the system transitions to dual voltage source mode, where it fine-tunes the auxiliary voltage source's amplitude and phase based on the determined mutual inductance and load values to realize zero phase angle for optimal impedance matching. The experimental results show that this method can obviously improve the output power of WPT system. This method stands out for its simplicity, adaptability and rapid response, suggesting its potential for practical use in dynamic charging applications.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12736","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595669","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":"Investigation and implementation of a common ground DC-DC buck converter with a novel control method for loss reduction in the converter","authors":"Sajad Ghabeli Sani,&nbsp;Mohamad Reza Banaei,&nbsp;Seyed Hossein Hosseini","doi":"10.1049/pel2.12740","DOIUrl":"https://doi.org/10.1049/pel2.12740","url":null,"abstract":"<p>This paper proposes a new control method for loss reduction of two series buck converters. The proposed method can be applied to each series of buck converters with two power switches. To enhance the efficiency of the converter compared to other structures, a method based on determining operating cycles for loss reduction is employed, leading to increased output efficiency of the converter. Additionally, to demonstrate the efficiency improvement using the proposed method compared to the conventional approach, the efficiency of converter is calculated through theoretical computations under real conditions, and the output results are compared for both losses and efficiency. In addition, the proposed high-buck converter in this paper benefits from a common ground advantage and exhibits a suitable conversion ratio. The high-buck converters are used in numerous applications for situations with low voltage and low power. The most important applications for these converters are the power supply for mobile phones, tablets, and other portable electronic devices, battery chargers, and LED drivers. Here, in order to demonstrate the validity of the proposed method, the MATLAB-Simulink results are provided. Moreover, in order to show the feasibility of the high-buck converter, a 100-W prototype has been implemented and the experimental results are provided.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12740","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596259","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":"Optimal control set expansion method for three-phase voltage source converter with slip window selection and online parameter modification","authors":"Linqiang Hu,&nbsp;Wanjun Lei,&nbsp;Zhongxiu Xiao,&nbsp;Xing Sun","doi":"10.1049/pel2.12733","DOIUrl":"https://doi.org/10.1049/pel2.12733","url":null,"abstract":"<p>Finite control set model predictive control (FCS-MPC) has been widely used in the control of three-phase voltage source converter (VSC), but its control performance declines sharply at low sampling frequencies. This paper proposes an optimal control set expansion method with slip window selection and online parameter modification to improve the performance and robustness of FCS-MPC. First, the performance of different control set expansion methods is compared. Then, an optimal control set expansion method that carries 12 virtual vectors is proposed. Last, a slip window selection strategy and an online parameter modification algorithm are proposed to reduce the computational burden and improve the controller's robustness respectively. Experimental result show that the proposed method significantly improves the control accuracy and carries good robustness and anti-disturbance ability. Compared with existing typical MPC strategies, the proposed method obtains better current quality with lower switching frequency and requires less calculation. Moreover, the design of the proposed method is simple and there is no weighting factor to be tuned, which increases the method's practicality.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12733","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596371","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":"Parameter identification of PLL for grid-connected inverter based on parameter sensitivity analysis","authors":"Fei Li,&nbsp;Qiang Feng,&nbsp;Ping Chen,&nbsp;Yang Liu,&nbsp;Shuiliang Cai,&nbsp;Hanyu Wang,&nbsp;Xing Zhang","doi":"10.1049/pel2.12739","DOIUrl":"https://doi.org/10.1049/pel2.12739","url":null,"abstract":"<p>Under the condition of weak grid, the phase-locked loop (PLL) is one of the main reasons for the sub-synchronous oscillation of the grid-connected inverter. Therefore, it is necessary to identify the PLL parameters of the grid-connected inverter for the analysis of the inverter operating performance. This paper uses the sequence impedance model and measured impedance data of grid-connected inverter to construct the identification function for parameter identification of PLL, and the function is calculated by particle swarm optimization algorithm to overcome the nonlinear problem of sequence impedance model. In addition, the identification frequency band is selected based on PLL parameter sensitivity to improve the parameter identification accuracy under the same impedance measurement error. At different frequencies, the positive correlation between the sensitivity of the PLL parameters and the identification accuracy is proven to determine the definite frequency band for PLL parameter identification of grid-connected inverter. Finally, the feasibility and effectiveness of the above research are verified by simulation and semi-physical experiments.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12739","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596372","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 novel nine-level inverter, applicable in air plane ground power unit","authors":"Reza Ebrahimi,&nbsp;Hossein Madadi Kojabadi","doi":"10.1049/pel2.12712","DOIUrl":"https://doi.org/10.1049/pel2.12712","url":null,"abstract":"<p>In this study, a novel nine-level inverter using one voltage source, 10 unidirectional and one bidirectional power switches, and two capacitors has been proposed to utilize in ground power units (GPUs). Selective harmonic elimination method has been applied to reduce the output voltage's THD to less than 3% with 115/200 V and 400 Hz. The proposed converter utilized a lower number of devices to output a nine-level staircase in comparison to existing converters. Also, the proposed converter uses inherent self-voltage balancing for capacitors' voltage. So, the control algorithm gets simpler. In this study, the topology analysis, modulation algorithm, capacitor calculation, loss, efficiency, and performance analysis of the proposed topology have been presented. The proposed circuit has been compared to recently published papers in terms of efficiency, switch, capacitor, diode, and source numbers. The theoretical and experimental performance of the topology has been verified by simulation on PSCAD and PSIM software and 350 W experimental setup.</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/pel2.12712","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021770","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":"Parameter-free predictive control with flexibility in power adjustment for grid-connected converters under unbalanced grid conditions","authors":"Alireza Jabbarnejad,&nbsp;Sadegh Vaez-Zadeh,&nbsp;Mohammad Khalilzadeh","doi":"10.1049/pel2.12721","DOIUrl":"https://doi.org/10.1049/pel2.12721","url":null,"abstract":"<p>This paper introduces a novel finite control set predictive direct power control method for grid-connected converters without cost function evaluations. Unlike conventional predictive direct power control, since the proposed method does not use the model parameters, their uncertainties do not cause prediction error and inappropriate voltage vector selection. The method employs a new form of voltage vector selection based on the slopes of active and reactive powers. The slopes are predicted in a manner with a low sensitivity to sampling noise, without updating a look-up table, and recursive methods. Hence, there are no stagnation and convergence issues. Also, the proposed method avoids startup problems caused by data-lacking due to directly regulating the active and reactive power by a switching logic. Flexible power oscillations control with balanced sinusoidal grid currents without any signal sequence extraction can also be achieved under this method in unbalanced grid conditions. The proposed method is assessed by both simulation and experimental studies, and its performance is compared with existing robust combined and model predictive control methods. The outcomes highlight the influence of the proposed approach and establish its superiority over the other considered methods.</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/pel2.12721","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359931","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}