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Design and Implementation of Linear and Nonlinear Feedforward Controllers for High-Performance Power Factor Corrected Circuits
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-02-17 DOI: 10.1049/pel2.70010
Tian-Hua Liu, Yu-Cheng Song, Woei-Luen Chen
{"title":"Design and Implementation of Linear and Nonlinear Feedforward Controllers for High-Performance Power Factor Corrected Circuits","authors":"Tian-Hua Liu,&nbsp;Yu-Cheng Song,&nbsp;Woei-Luen Chen","doi":"10.1049/pel2.70010","DOIUrl":"https://doi.org/10.1049/pel2.70010","url":null,"abstract":"<p>This paper investigates the design and implementation of a linear feedforward controller, which creates the compensation duty cycle near zero-voltage crossing points for the power factor corrected (PFC) circuits, and a nonlinear feedforward controller, which is developed by using a linearization model of the high-performance PFC circuits. These two control approaches are proposed, compared and analysed. To address the discontinuous current near the zero-crossing point, two extra feedforward compensators with specific parameters are designed to refine the duty cycles of the switching devices. Experimental results and analytical results show that the proposed methods can provide a wider frequency range and flatter gain for the closed-loop PFC system. Furthermore, the proposed control methods have quicker recovery times and smaller voltage drops at the direct current (DC) output voltage than the traditional control method when the PFC is operated at a repetitive switching resistance load. Control algorithms were implemented and tested on a digital signal processor-based PFC circuit, which is a 500 W prototype with a single-phase alternating current input of 110 V and a DC output of 300 V to validate the feasibility and effectiveness of the proposed methods. Experimental results demonstrate that these feedforward control methods are superior to traditional proportional integral controllers, offering an improved input power factor, reduced harmonic currents, better performance under a repetitive switching resistance load and more straightforward implementation.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143424094","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
Design and Experimental Validation of a Composite FRL-NFTISMC and BSC for DC-Bus Voltage Stabilization in CPL-Based DC Microgrids
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-02-14 DOI: 10.1049/pel2.70012
Darul Atfal Palash, Tushar Kanti Roy, Zubaer Alam, Amanullah Maung Than Oo
{"title":"Design and Experimental Validation of a Composite FRL-NFTISMC and BSC for DC-Bus Voltage Stabilization in CPL-Based DC Microgrids","authors":"Darul Atfal Palash,&nbsp;Tushar Kanti Roy,&nbsp;Zubaer Alam,&nbsp;Amanullah Maung Than Oo","doi":"10.1049/pel2.70012","DOIUrl":"https://doi.org/10.1049/pel2.70012","url":null,"abstract":"<p>Transportation electrification relies heavily on DC distribution networks powered by power electronics and the integration of various power electronic loads. These tightly regulated loads, known as constant power loads (CPLs), can destabilize the system when operating alongside source converters. This paper presents a novel hybrid controller to stabilize the DC bus voltage in the presence of CPLs in a DC-DC boost converter (DDBC) within DC microgrids. To achieve this, the DDBC's dynamic model is first transformed into Brunovsky's canonical form through feedback linearization, resolving the non-minimum phase issue and making the model more suitable for designing the proposed controller. Next, a robust control input is developed to ensure the convergence of all relevant states to their desired values while effectively managing disturbances and handling significant fluctuations in input voltage and load. The proposed controller combines a modified fast-reaching law-based nonsingular fast terminal integral sliding mode controller (FRL-NFTISMC) with a backstepping controller (BSC) to address the negative incremental impedance behavior of CPLs, a common cause of grid instability. Furthermore, the composite controller guarantees large-signal stability, verified through the Lyapunov stability theory. Finally, numerical simulations in MATLAB 2022b/Simulink demonstrate the controller's robustness under various conditions, outperforming existing nonsingular fast terminal sliding mode controller, conventional sliding mode controller, and proportional-integral (PI) controllers. Experimental results from an in-house hardware platform support the simulation findings and theoretical design, highlighting the controller's superior response speed and system resilience across different operating modes.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404420","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
On Power Electronic Converter's Architecture and Control for Overtopping Breakwater for Wave Energy Conversion
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-02-10 DOI: 10.1049/pel2.70008
Luigi Rubino, Roberto Langella
{"title":"On Power Electronic Converter's Architecture and Control for Overtopping Breakwater for Wave Energy Conversion","authors":"Luigi Rubino,&nbsp;Roberto Langella","doi":"10.1049/pel2.70008","DOIUrl":"https://doi.org/10.1049/pel2.70008","url":null,"abstract":"<p>This paper discusses the power electronic converter's architecture and control for overtopping breakwater for wave energy conversion (OBREC) systems for the first time for this kind of technology. After a recall of the main OBREC's components, their dynamic models and control strategies are briefly summarized. Then, an innovative maximum power point tracking strategy is proposed, and a proactive overview of different existing power electronic architectures to connect the OBREC system to the harbour's electrical distribution systems is conducted. The whole converter's control design process is preliminarily tested utilizing the processor-in-the-loop tool implemented in the Matlab environment. Finally, two numerical case studies on a realistic scenario are discussed and commented.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143380815","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
Ensemble speed estimation in IFOC with transient detector
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-02-09 DOI: 10.1049/pel2.70007
Manuel R. Arahal, Manuel G. Satué, Juana Martínez-Heredia, Manuel A. Perales-Esteve
{"title":"Ensemble speed estimation in IFOC with transient detector","authors":"Manuel R. Arahal,&nbsp;Manuel G. Satué,&nbsp;Juana Martínez-Heredia,&nbsp;Manuel A. Perales-Esteve","doi":"10.1049/pel2.70007","DOIUrl":"https://doi.org/10.1049/pel2.70007","url":null,"abstract":"<p>Rotating electric machines have experienced a vast increase in use in recent times due to the electrification of various segments, including electric vehicles. Different machine types, electronic converters, and control schemes are used. In particular, the combination of indirect field oriented control (IFOC) with incremental encoders is widely utilized. Despite theoretical efforts, practical tuning of IFOC-like structures is not easy due to non-idealities. These arise from difficult to model phenomena appearing in the system. In particular, the latency and phase loss of the speed estimation have a negative effect on performance. This paper proposes the use of an ensemble of speed estimators to reduce these negative effects. In the proposal, ripples and latency of the speed estimations are treated as terms in a trade-off situation. The proposal allows to obtain low ripple in a steady state combined with low latency during transients.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143380227","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
Predicting core losses in power converters based on open source database
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-02-09 DOI: 10.1049/pel2.70009
Yan Zhou, Minmin Zhang
{"title":"Predicting core losses in power converters based on open source database","authors":"Yan Zhou,&nbsp;Minmin Zhang","doi":"10.1049/pel2.70009","DOIUrl":"https://doi.org/10.1049/pel2.70009","url":null,"abstract":"<p>Core losses are closely related to flux densities, frequencies, temperatures, exciting waveforms, and DC biases. Hysteresis losses and dynamic losses are considered the main components of core losses. A method for predicting core losses based on an open-source database and a data-driven physical model is proposed. To a certain predicted point, two paths in the procedure can be executed automatically. First, if there are two points in the database with similar working conditions to the predicted point, core loss power density can be directly predicted based on separate equations. Secondly, if loss power density for specific waveforms in the database are missing, hysteresis loss power density and dynamic loss power density under sinusoidal excitations can be utilized to estimate core loss power density for specific waveforms. Based on the proposed method, the impact of temperature on hysteresis loss power density and dynamic loss power density can also be individually fitted and analysed. The proposed concepts demonstrate good flexibility in handling various complex waveforms in power electronics and have been accurately verified using the loss data of N49 and N87 in the MagNet database.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143380228","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 bipolar high-voltage pulse driver for air-coupled ultrasonic defect detection in soft-pack lithium battery
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-01-28 DOI: 10.1049/pel2.70004
Kan Luo, Qirong Zhang, Yu Chen, Siluo Chen, Jing Huang, Chaobing Liang
{"title":"A bipolar high-voltage pulse driver for air-coupled ultrasonic defect detection in soft-pack lithium battery","authors":"Kan Luo,&nbsp;Qirong Zhang,&nbsp;Yu Chen,&nbsp;Siluo Chen,&nbsp;Jing Huang,&nbsp;Chaobing Liang","doi":"10.1049/pel2.70004","DOIUrl":"https://doi.org/10.1049/pel2.70004","url":null,"abstract":"<p>Developing a high-performance transducer driver is essential yet challenging for air-coupled ultrasound applications. This study introduces a MOSFET-based bipolar high-voltage pulse driver designed for defect detection in soft-pack lithium batteries. High-voltage DC generation is achieved through a push–pull inverter and full-wave voltage multiplier circuit, producing a stable DC output. High-speed MOSFET switching then controls the charging and discharging of a capacitor in an RC network, generating a symmetric bipolar high-voltage pulse signal with a peak-to-peak voltage of 1104 V at 100 kHz. Performance evaluation experiments demonstrated that a 7-cycle pulse train provides an optimal balance of signal penetration and time resolution, effectively preventing waveform overlap. The system reliably penetrates soft-pack lithium batteries up to 6 mm thick, and detects internal lithium battery defects, such as 1 mm air bubbles. Overall, this bipolar high-voltage pulse driver surpasses traditional designs in both time and frequency domains, offering enhanced detection accuracy and practicality for air-coupled ultrasonic inspection of lithium battery defects.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120168","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 two-channel data and power synchronous transmission method for SRG-integrated power networks through piecewise composite modulation
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-01-22 DOI: 10.1049/pel2.70003
Tan Wang, Zhiyi Shao, Kunbo Yang, Dongsheng Yu, Samson Shenglong Yu, Yihua Hu
{"title":"A two-channel data and power synchronous transmission method for SRG-integrated power networks through piecewise composite modulation","authors":"Tan Wang,&nbsp;Zhiyi Shao,&nbsp;Kunbo Yang,&nbsp;Dongsheng Yu,&nbsp;Samson Shenglong Yu,&nbsp;Yihua Hu","doi":"10.1049/pel2.70003","DOIUrl":"https://doi.org/10.1049/pel2.70003","url":null,"abstract":"<p>Reliable communication is key to achieving remote control, status monitoring, and early fault detection in SRG-integrated power networks. This paper proposes a novel piecewise composite modulation method to simultaneously modulate data and power during the excitation and power generation stages in each phase of an SRG system. By adopting a frequency-shift keying modulation strategy, two-channel data can be modulated and injected into the bus voltage as voltage ripples, allowing for more efficient use of the bus voltage frequency band. Welch's algorithm-based power spectrum method is innovatively employed to demodulate the transmitted data on the SRG's output bus. Experimental results confirm the feasibility of the proposed data and power synchronous transmission (DPST) strategy, which shows significant potential in SRG-integrated power networks.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118031","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
Efficient high step-down converter with soft switching and minimal components
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-01-22 DOI: 10.1049/pel2.70002
Mohammed Ismaeel Sehen Sehen, Majid Delshad, Nadheer A. Shalash, Bahador Fani
{"title":"Efficient high step-down converter with soft switching and minimal components","authors":"Mohammed Ismaeel Sehen Sehen,&nbsp;Majid Delshad,&nbsp;Nadheer A. Shalash,&nbsp;Bahador Fani","doi":"10.1049/pel2.70002","DOIUrl":"https://doi.org/10.1049/pel2.70002","url":null,"abstract":"<p>This paper presents a novel two-switch high step-down converter based on the conventional Ćuk converter. The proposed converter features lower gain and higher efficiency due to reduced switching and conduction losses. Notably, it enables zero current switching turn-on for switches without requiring additional components, enhancing its efficiency. The low voltage stress on the switches significantly impacts efficiency. Additionally, its simple topology reduces the component count, further improving efficiency. Zero current switching turn-off condition for the diode effectively addresses reverse recovery problem. To validate its performance, a prototype operating at 200 W output power, 300 V input voltage, 24 V output voltage, and 40 kHz switching frequency is implanted.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118124","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
Active voltage balancing by turn-off delays regulation for multiple series-connected SiC MOSFETs
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-01-22 DOI: 10.1049/pel2.70001
Cédric Mathieu de Vienne, Pierre Lefranc, Pierre-Olivier Jeannin, Bruno Lefebvre, Besar Asllani
{"title":"Active voltage balancing by turn-off delays regulation for multiple series-connected SiC MOSFETs","authors":"Cédric Mathieu de Vienne,&nbsp;Pierre Lefranc,&nbsp;Pierre-Olivier Jeannin,&nbsp;Bruno Lefebvre,&nbsp;Besar Asllani","doi":"10.1049/pel2.70001","DOIUrl":"https://doi.org/10.1049/pel2.70001","url":null,"abstract":"<p>SiC MOSFETs are currently the most appropriate solution for high-efficiency conversions at low kilovolts (<span></span><math>\u0000 <semantics>\u0000 <mo>&lt;</mo>\u0000 <annotation>$&lt;$</annotation>\u0000 </semantics></math><span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>10</mn>\u0000 <mspace></mspace>\u0000 <mi>kV</mi>\u0000 </mrow>\u0000 <annotation>$10 ,{rm kV}$</annotation>\u0000 </semantics></math>). For higher voltages, the series connection of SiC MOSFETs shows great promise. However, voltage sharing remains a significant technical challenge. This article proposes an active voltage balancing approach for a stack of N SiC MOSFETs, achieved through precise adjustment of turn-off delays based on real-time voltage feedback. Using an analytical model tailored to describe voltage sharing, a control method is designed, configured, and evaluated. Control behavior is experimentally validated on hard switching converters.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118029","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
Piecewise pulse-width modulation for neutral-point current reduction in NPC inverter
IF 1.7 4区 工程技术
IET Power Electronics Pub Date : 2025-01-17 DOI: 10.1049/pel2.70000
Mikhail Savastianov, Keyue Smedley
{"title":"Piecewise pulse-width modulation for neutral-point current reduction in NPC inverter","authors":"Mikhail Savastianov,&nbsp;Keyue Smedley","doi":"10.1049/pel2.70000","DOIUrl":"https://doi.org/10.1049/pel2.70000","url":null,"abstract":"<p>Effective neutral-point balancing in a neutral-point-clamped inverter can yield substantial benefits, including cost reduction and efficiency improvement for the system. This article proposes a new piecewise pulse-width modulation designed to reduce low-frequency oscillations of the neutral-point current without compromising the inverter power losses. The proposed piecewise modulation is simple to implement as it has one reference signal per phase. The performance of the proposed modulation is validated through comprehensive comparisons with alternative methods. The obtained simulation and experimental results demonstrate the effectiveness of the proposed piecewise modulation.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116035","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
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