IET Power Electronics最新文献

{"title":"Time-domain design for misalignment-tolerant dynamic wireless charging","authors":"Juan Carlos Quirós,&nbsp;Álvaro Llamas Calvo,&nbsp;Alicia Triviño,&nbsp;Eliseo Villagrasa Guerrrero","doi":"10.1049/pel2.12777","DOIUrl":"https://doi.org/10.1049/pel2.12777","url":null,"abstract":"<p>Wireless power transfer (WPT) offers a safer and more convenient alternative to traditional charging methods. In the automotive sector, dynamic WPT presents a promising solution by reducing battery size and enhancing vehicle usability. The key components of dynamic WPT systems are the coils and their compensation topologies. This paper provides a detailed analysis of these elements to optimize system performance. First, different coil geometries are systematically evaluated using finite element analysis, aiming to identify designs that minimize electrical parameter variations, which can damage electronics and make the control more complex. Then, the most suitable compensation topology is determined through time-domain analysis, which is more accurate under dynamic conditions than the commonly used phasor-based approach. This design process based on time-domain analysis is validated with a 100 W dynamic charger prototype, demonstrating the system's transient behaviour. Experimental results show an efficiency of up to 80% and high tolerance to misalignment under various load conditions.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12777","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113680","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 new series-parallel active compensator for DC microgrids based on three-leg voltage source converter","authors":"Zahra Mortezapour,&nbsp;Fatemeh Mortezapour,&nbsp;Hossein Hojabri","doi":"10.1049/pel2.12824","DOIUrl":"https://doi.org/10.1049/pel2.12824","url":null,"abstract":"<p>DC microgrids are gaining increasing attention due to their advantages such as high reliability, high efficiency, ease of renewable energy sources integration, and the absence of frequency and reactive power regulation problems. Connection of AC energy sources and loads to the DC microgrids through AC/DC converters can distort the DC microgrids voltage and current. In addition, the fault occurrence in the DC or upstairs AC microgrids can cause voltage sag and swell. Compensating and reducing these voltage and current distortions requires efficient and cost-effective solutions. This article proposes two new topologies of DC series-parallel active compensators for voltage and current compensation in DC microgrids. In the first topology, the back-to-back connection of an isolated bidirectional DC/DC converter with a full-bridge converter is used to compensate voltage and current. In the second one, to eliminate the transformer, simplify the converter structure and reduce its cost, an active compensator based on a three-leg voltage source converter is proposed which can compensate both the microgrid voltage harmonics, sag and swell, and the load current harmonics. The proposed topologies performances are confirmed through their simulation in the MATLAB/SIMULINK environment. A simple experimental setup is also provided to validate the simulation results.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"3071-3082"},"PeriodicalIF":1.7,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12824","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248815","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":"Empowering talkative power technology in wireless power transfer with machine learning","authors":"Seyed Ali Mousavi,&nbsp;Zahra GhahramanIzadi,&nbsp;Mohammad Hassan Khooban","doi":"10.1049/pel2.12826","DOIUrl":"https://doi.org/10.1049/pel2.12826","url":null,"abstract":"<p>In this article, a model is proposed for talkative power (TP) implemented wireless power transfer circuit for constant power load applications that concurrently transmit power and information through a shared channel. The innovative model considers critical factors such as load variations and limited receiver knowledge regarding transmitter component values, which are vital for the seamless operation of TP technology in charging devices with varying loads that are oblivious to the parameters of the transmitter. An efficient transmitter and an optimal receiver are introduced in the framework. The transmitter's design revolves around encoding data into the phase angle between the arm bridges, chosen to optimize energy efficiency. Notably, the model employs a buck-boost converter whose duty cycle is dynamically adjusted by the controller to accommodate changes in information or transmission phases, ensuring smooth system operation. Maximum likelihood detection methods are rendered impractical at the receiver due to the model's assumptions. To address this challenge, a neural network is implemented as a supervised learning classifier to extract information from the output voltage ripple. The simulations utilize the Speedgoat Real-Time Target Machine in conjunction with Simulink RealTime highlighting the effectiveness of the efficient transmitter and optimal receiver demonstrating the robustness of the model.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"3083-3092"},"PeriodicalIF":1.7,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12826","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248621","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":"Maximization utilization of DC-link voltage in variable flux reluctance machine with field winding driven by single-leg converter","authors":"Yang Cao,&nbsp;Xu Liu,&nbsp;Tianyu Li,&nbsp;Xiaotian Zhang","doi":"10.1049/pel2.12820","DOIUrl":"https://doi.org/10.1049/pel2.12820","url":null,"abstract":"<p>In order to improve the torque/speed characteristics of the variable flux reluctance machines (VFRMs), an optimal voltage distribution method is proposed to maximize the utilization of the DC-link voltage. According to the investigation of operating range VFRM driven by single-leg converter, the optimal armature voltage and the zero-sequence voltage can be obtained to generate adjustable zero-sequence current. Thus, the DC-link voltage utilization and output capacity of VFRM can be significantly improved by optimizing the zero-sequence current. For verification, the test results on a prototype 6/4 VFRM with single-leg excitation are presented. The experimental results indicate that, compared with the constant zero-sequence current control, the DC-link voltage utilization of the VFRM with proposed method increases by 11.13% together with 36.67% higher output torque at rated speed.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"3017-3026"},"PeriodicalIF":1.7,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12820","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248395","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 high effectiveness impact-optimized piezoelectric energy harvesting interface system","authors":"Saman Shoorabi Sani","doi":"10.1049/pel2.12831","DOIUrl":"https://doi.org/10.1049/pel2.12831","url":null,"abstract":"<p>This paper presents a novel high-performance impact-optimized interface system for an impact-driven piezoelectric energy harvester (PEH) which utilizes two independent parallel harvesting plans, that is, low-efficiency self-powered passive path and high-efficiency active maximum power point tracking (MPPT)-based path, for different situations based on the characteristics of the input excitation and stored energy content which are evaluated by the mode detection unit. It uses a synchronous electrical charge extraction-based self-powered passive circuit as a primary energy extraction strategy. Thus, the proposed structure is self-sustained with cold start capability. When the determined prerequisites are met, the system switches to the secondary energy extraction strategy, that is, high-efficiency MPPT-based path, in which during the maximum power point sensing phase, the PEH is sensed without disconnecting it from the interface and during the maximum power point setting phase, a bidirectional DC/DC converter performs a fully bidirectional energy transfer, increasing the extraction efficiency. The proposed system is designed and simulated using standard 180 nm complementary metal-oxide semiconductor (CMOS) technology. Post-layout simulation results show that when the input energy content is around 50 µJ, the FoM_MOPIR, periodic harvesting efficiency, shock harvesting efficiency, MPPT efficiency, and effectiveness of the proposed system are 505%, 65%, 80%, 70%, and 56%, respectively.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"3120-3138"},"PeriodicalIF":1.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12831","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248144","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":"Master–slave strategy based on fuzzy control for SOC recovery in the BESS FM process","authors":"Ningning Li,&nbsp;Meiru Chen,&nbsp;Mingfei Ban,&nbsp;Yiqi Liu","doi":"10.1049/pel2.12829","DOIUrl":"https://doi.org/10.1049/pel2.12829","url":null,"abstract":"<p>Conventional units can regulate grid frequency but often face challenges such as slow response times and accelerated aging. As a solution for frequency modulation (FM), the battery energy storage system offers a promising alternative, enabling efficient frequency regulation while maintaining the state of charge (SOC) within an optimal range. This article proposes a master–slave FM strategy based on fuzzy control to facilitate SOC restoration during the FM process. Initially, the principles of FM for both control types are examined, focusing on the output characteristics of virtual sag control and virtual inertia control. Subsequently, a collaborative output approach combining sag control and inertia control is presented as the primary FM strategy, where frequency changes are analysed, and frequency deviations and SOC are regionally categorized. An adaptive regulator is then designed to dynamically allocate weights to the outputs of the sag and inertia slave FM controls. Finally, simulation results validate the effectiveness and feasibility of the proposed master–slave FM strategy. Under conditions of continuous load disturbance, the strategy demonstrates a 4.07% improvement in SOC recovery compared to conventional control strategies that coordinate outputs through sag and inertia control.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"2829-2841"},"PeriodicalIF":1.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12829","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253605","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":"An accurate small-signal model of a low-side active clamp forward converter and stability assessment in hard- and soft-switching operations","authors":"Emmanuel Seun Oluwasogo,&nbsp;Jens Peter Konrath","doi":"10.1049/pel2.12814","DOIUrl":"https://doi.org/10.1049/pel2.12814","url":null,"abstract":"<p>This article examines the internal stability of an active clamp forward converter (ACFC) from a non-linear system and arbitrary changes in the state variable's point of view. The analysis is based on the Lyapunov direct method in conjunction with the operating theory of the ACFC. The equivalent circuit with the state equations is established and their stability is assessed in consideration of the hard- and soft-switching operations using the Lyapunov energy function approach in a piecewise manner. In addition, averaged switch modelling is applied explicitly to derive a more accurate small-signal model of a low-side ACFC. The study revealed the presence of a non-minimum phase problem as the major adverse effect on the stability feature of the ACFC predesigned with soft-switching capability. The instability of ACFC is related to the magnetising inductance (<span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>L</mi>\u0000 <mi>m</mi>\u0000 </msub>\u0000 <annotation>${{L}_m}$</annotation>\u0000 </semantics></math>) value (core loss resistance) which influences/determines the hard- or soft-switching operations of the ACFC. Hardware prototype was developed with two different transformers having distinct values of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mspace></mspace>\u0000 <msub>\u0000 <mi>L</mi>\u0000 <mi>m</mi>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$ {{L}_m}$</annotation>\u0000 </semantics></math> for hard- and soft-switching operations. From the experimental frequency measurement, the model accurately predicts the movement of the complex zeros from the left-half-plane (LHP) to the right-hand-plane (RHP) as the ACFC changes from the hard-switching to a soft-switching operation.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"2956-2970"},"PeriodicalIF":1.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12814","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253574","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 memristor-sourced key for encrypted power and data synchronous transmission in switched mode power supplies","authors":"Chiemeka L. Maxwell,&nbsp;Zixiang Wang,&nbsp;Dongsheng Yu,&nbsp;Marek Pastor,&nbsp;Samson S. Yu,&nbsp;Mohammed Alkahtani","doi":"10.1049/pel2.12827","DOIUrl":"https://doi.org/10.1049/pel2.12827","url":null,"abstract":"<p>In power and data synchronous transmission (PDST), it is crucial to modulate additional signals onto the voltage bus of the converters. This reduces the cost of monitoring and control of the power grid. There is thus the need to ensure that the data transmitted is well secured. This study, designs an electronic system that uses the common coupling point for PDST. Then Chua's memristive circuit is introduced as an entropy source for generating a random bit sequence for encrypted PDST in a switched mode power supply. The encrypted data signal is modulated using phase shift key modulation. Thereafter, the carrier signal is pulse width modulation modulated to control the switching operation of the power switch. The use of Chua's memristive circuit for generating a random number is not new; however, there is little study directly adopting its use in PDST. This allows for resource sharing since multiple signal sources can share the same bus without interference or security risk. The generated random bits are tested for randomness using National Institute of Standards and Technology test suite and autocorrelation test. MATLAB/Simulink and experimental results both confirm the effectiveness of the proposed data encryption method.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"3093-3108"},"PeriodicalIF":1.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12827","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253348","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":"Voltage partial compensation strategy based on SA-PSO algorithm for hybrid distributed transformers","authors":"Ming Ma,&nbsp;Fang Zhuo,&nbsp;Wanlin Du","doi":"10.1049/pel2.12811","DOIUrl":"https://doi.org/10.1049/pel2.12811","url":null,"abstract":"<p>Hybrid distributed transformers(HDT) play a good role in solving the problem of voltage fluctuation and asymmetry on the low-voltage side. However, when the load voltage fluctuates, if the load voltage is fully compensated to meet the condition that the load voltage is equal to the rated voltage, HDT requires a larger compensation capacity and higher design cost. The output capacity of HDT is affected by multiple degrees of freedom, and the optimal output capacity cannot be obtained according to the traditional analytical formula. In order to obtain the optimal output capacity of HDT, this paper proposes a HDT voltage partial compensation strategy based on the SA-PSO algorithm. By analysing the relationship between load and voltage regulation adjustment, the optimal working point is found by the SA-PSO optimization algorithm. The proposed compensation strategy reduces the compensation capacity required by HDT, thereby reducing the design cost. The simulation results show the effectiveness of the proposed voltage partial compensation strategy.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"2930-2943"},"PeriodicalIF":1.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12811","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253411","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":"Improvement of EME accuracy based on an equivalent voltage acquisition method and corresponding voltage compensation strategy","authors":"Mingyu Wang,&nbsp;Beining Yang,&nbsp;Yaru Qin,&nbsp;Guanglin Dong","doi":"10.1049/pel2.12828","DOIUrl":"https://doi.org/10.1049/pel2.12828","url":null,"abstract":"<p>It is a known cost-effective method to employ a DSP-based electric machine emulator (EME) for motor control unit testing, this paper introduces a novel approach to enhance the emulator's accuracy. The inaccuracies caused by terminal voltage sampling errors in the motor control unit and voltage distortions in the inverter are addressed in this paper. An advanced equivalent voltage acquisition technique, which samples the duty cycle-amplitude of the inverter's terminal voltage, is developed. Leveraging the acquired equivalent voltage data, a novel voltage compensation strategy that providing more accuracy in EME performance is proposed. The mathematical foundation of the EME is established using Kirchhoff's voltage and current laws. These findings are independently validated through simulations and experiments. The results provide robust evidence that the proposed equivalent voltage acquisition and compensation strategies can enhance the accuracy of the EME.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"17 16","pages":"3109-3119"},"PeriodicalIF":1.7,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12828","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253088","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}