International Journal of Circuit Theory and Applications最新文献

{"title":"VCII-Based Immittance Simulators: Generalized Parallel Configurations","authors":"Meghana Shrivastava,&nbsp;Data Ram Bhaskar,&nbsp;Pragati Kumar","doi":"10.1002/cta.4300","DOIUrl":"https://doi.org/10.1002/cta.4300","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, four new generalized configurations of grounded parallel-type immittance simulators are proposed. These circuits implement parallel resistor–inductor (RL), parallel resistor–capacitor (RC), parallel capacitor–frequency-dependent negative resistance (CD), and capacitance multiplier configurations utilizing only two second-generation voltage conveyors (VCII±) as active elements along with three impedances, without the need for specific matching conditions. The applicability of the proposed parallel RL and capacitance multiplier configurations as a second-order high-pass filter (HPF) and a first-order low-pass filter (LPF), respectively, is also demonstrated. These applications illustrate the versatility and utility of the proposed structures. Frequency, transient, and Monte Carlo analysis utilizing the CMOS VCII± in the SPICE simulation tool have also been performed to validate the feasibility of the presented circuits. Further validation is carried out through layout design in Cadence Virtuoso, employing 0.18-μm CMOS technology. Both presimulation and postsimulation results are presented for a thorough assessment of the proposed circuits. Also, the claimed theory is verified by experimental results based on the VCII implementation with commercially available IC AD844.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3754-3766"},"PeriodicalIF":1.8,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Survey of Phase Shifters for Microwave Phased Array Systems","authors":"M. Kebe,&nbsp;M. C. E. Yagoub,&nbsp;R. E. Amaya","doi":"10.1002/cta.4298","DOIUrl":"https://doi.org/10.1002/cta.4298","url":null,"abstract":"<p>Phased Array Systems (PASs) are extensively used in radar and telecommunication systems for diverse applications, including military surveillance and wireless broadband communication. Besides, they are becoming increasingly indispensable in modern applications such as multi-function phased array radars for weather monitoring and aircraft tracking or high-throughput satellite systems, which aim to provide fast broadband connectivity in remote areas. Despite the numerous advantages of phased array systems with RF phase shift, including high signal-to-noise and signal-to-interference ratios, as well as low complexity, they present a few limitations, including high cost and large chip areas. The cost and size of PASs are mainly dependent on the RF phase shifters, which are essential to their operation. This article describes the different types of phase shifters (mechanical, ferromagnetic/magnetic, electromechanical, and electronic). It compares their performance metrics, highlighting that electronic phase shifters are the most common type used in modern PASs. In this regard, a comparative study of different subcategories of electronic phase shifters, such as the switched-type, reflective-type, loaded-transmission line, and vector-sum phase shifters, are explored along with their advantages, drawbacks and state-of-art techniques used to address their limitations. Therefore, this article may serve as a reference for research milestones on RF phase shifters.</p>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3719-3739"},"PeriodicalIF":1.8,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cta.4298","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Wide Range and High Voltage Conversion Bidirectional DC/DC Converter for DC Microgrid","authors":"Dhivya Panneerselvam,&nbsp;Kodumur Meesala Ravi Eswar","doi":"10.1002/cta.4273","DOIUrl":"https://doi.org/10.1002/cta.4273","url":null,"abstract":"<div>\u0000 \u0000 <p>Bidirectional DC/DC converters (BDCs) are crucial in energy storage integration with DC microgrid. In this article, a new wide-range and high voltage conversion (VC) nonisolated BDC with simple structure having reasonable components (total 13) is proposed. The proposed BDC with symmetrical VC ratio delivers high conversion of voltage within the vicinity of 0.5 duty ratio in both boost and buck modes of operation. In addition, the proposed BDC has features of continuous currents at low and high voltage stages and reduced switch voltage stress. This article presents the proposed BDC with circuit configuration and its detailed steady-state boost and buck mode analyses to verify achievable VC ratio and design consideration. With the designed practical model of the proposed BDC, loss analysis is exhibited to verify the conversion efficiency in boost and buck modes of operation. In real time, experimental prototype of the proposed BDC is operated with LAUNCHXL-F28379D kit to realize switching pulse generation. The experimental response of the entire proposed BDC operation is captured at 200 W loading. The attained experimental results and discussions validate the proposed BDC operation with the mentioned features. Finally, a comparative analysis with existing BDCs is performed to prove the competence of the proposed BDC for DC microgrid.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3431-3449"},"PeriodicalIF":1.8,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiple-Input and Multiple-Output–Based Cascaded Boost Hybrid Interlink Converter","authors":"Shirazul Islam,&nbsp;Atif Iqbal,&nbsp;Seyed Majid Hashemzadeh,&nbsp;Md Samiullah,&nbsp;Ahmed Abbas,&nbsp;Arif Khan,&nbsp;Mohammad Meraj,&nbsp;Farhad Ilahi Bakhsh,&nbsp;Mousa Marzband,&nbsp;Irfan A. Khan","doi":"10.1002/cta.4279","DOIUrl":"https://doi.org/10.1002/cta.4279","url":null,"abstract":"<div>\u0000 \u0000 <p>The multiple-input and multiple-output (MIMO) DC–DC converters offer various advantages such as improved efficiency and reduced component count. However, the preference of these converters over other types of converters is dependent on the specific application and requirements. Various types of boost-derived MIMO DC–DC converters are discussed in the literature. However, these converters are either nonisolated or isolated types. In the paper, a MIMO-based cascaded boost hybrid interlink converter (CBHIC) has been proposed. The proposed converter includes four DC–DC boost converters that are supplied power by two input DC sources. The boosted DC output of these converters can be used independently or in a cascaded manner depending upon the requirement of the load. Further, the cascaded action of these four boost converters leads to the production of two high-frequency AC outputs. By using bridge rectifiers and high-frequency transformers, high-frequency AC voltages are converted into DC. Therefore, two isolated DC output voltages can be achieved using CBHIC. The complementary operation of the cascaded boost converters results in reduction of source current ripples. The design, operating modes, and performance evaluation of the proposed CBHIC have been included in the paper. To validate the efficacy of the proposed CBHIC, a lab prototype of 400 W is prepared. The rms value of high-frequency AC output voltage at each is isolated port is 141 V. The CBHIC exhibits an efficiency of 94.3 at 400 W. The operation of the converter during voltage control mode is further explored and its dynamic response is studies with the help of experimental results. The obtained simulation and experimental results validate the effectiveness of the proposed converter.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3324-3344"},"PeriodicalIF":1.8,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Reconfigurable IPT System With CC-CV Output Characteristics and High Misalignment Tolerance","authors":"Zhaowei Gong,&nbsp;Man Zhao,&nbsp;Yajing Yang,&nbsp;Ningchao Zhang,&nbsp;Yongsheng Fu","doi":"10.1002/cta.4311","DOIUrl":"https://doi.org/10.1002/cta.4311","url":null,"abstract":"<div>\u0000 \u0000 <p>Misalignment between transmission coils is an inevitable challenge in inductive power transfer (IPT) systems, particularly affecting the constant current (CC) and constant voltage (CV) outputs essential for battery charging. A reconfigurable IPT system with high misalignment tolerance and CC-CV output characteristics is proposed in this article. The main circuit of the system is composed of a LCC-LCC and LCC-S topology with two intermediate coils, and two switches equipped with single unidirectionally blocking MOSFETs are incorporated on the secondary side to transition from CC to CV mode. A comprehensive analysis of the output characteristics for the proposed hybrid topology in both CC and CV modes is provided. Furthermore, the parameter optimization design based on BP coil for wide misalignment tolerance is presented. The experimental results demonstrate that the proposed reconfigurable IPT system can maintain stable CC and CV outputs within 50% lateral and vertical offset (the coupling factor varies from 0.1 to 0.21), when the load varies from 11 to 80 Ω, and the output current and voltage fluctuations remain below 5%.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3345-3356"},"PeriodicalIF":1.8,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on Cascaded On-Board DC/DC Converter Based on Three-Phase Interleaved LLC","authors":"Kai Zhou,&nbsp;Xu Zheng,&nbsp;Yang Liu","doi":"10.1002/cta.4309","DOIUrl":"https://doi.org/10.1002/cta.4309","url":null,"abstract":"<div>\u0000 \u0000 <p>The on-board DC/DC converter proposed in this research consists of a Buck converter and a three-phase interleaved LLC resonant converter. This paper analyzes the average current and output current ripple characteristics of the rear-stage converter in addition to explaining the topology and working principles of the front-stage Buck converter and the rear-stage three-phase interleaved LLC resonant converter. To establish a single-phase fundamental equivalent circuit for the rear-stage converter, apply the fundamental wave analysis method, and it is essential for comprehending the impact of relevant system parameters on voltage gain characteristics and resonant operating regions. Conducting research on the two-stage on-board DC/DC converter's control strategy involves establishing small-signal circuit models for both front and rear stage converters, derivation of parameters for double closed-loop control, and determination of the control strategy employing phase-shifted current sharing for the rear-stage converter in cases where significant tolerance exists in resonant components. The simulation for a two-stage on-board DC/DC converter results indicates that under various conditions of resonant component tolerance, the converter is capable of achieving balanced phase currents and demonstrates minimal output current ripple prior to capacitor filtering. A 1.5-kW experimental prototype has been fabricated, and the experimental findings indicate that the output voltage remains stable at 13.8 V despite fluctuations in input voltage. The highest efficiency of the prototype is about 96.27%, and the utilization of phase-shifting current balancing control results in a notable reduction in output current ripple. This provides more evidence that the design of a two-stage on-board DC/DC converter is correct.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3357-3374"},"PeriodicalIF":1.8,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Step-by-Step Approach for Replacing Si-IGBTs With SiC-MOSFETs Modules in Industrial Power Converters","authors":"Edemar O. Prado,&nbsp;Pedro C. Bolsi,&nbsp;Hamiltom C. Sartori,&nbsp;José R. Pinheiro","doi":"10.1002/cta.4295","DOIUrl":"https://doi.org/10.1002/cta.4295","url":null,"abstract":"<div>\u0000 \u0000 <p>This work presents a step-by-step approach for replacing Si-IGBTs with SiC-MOSFETs modules in a 9-kW commercial double-conversion UPS. Incremental modifications are applied to the original system, considering variations in switching frequency and evaluating its influence on losses and total volume. Through the use of Si-IGBT transistors and redesigning the system, the volume and losses are analyzed for switching frequencies between 10 and 17 kHz. The IGBT showed limitations around 17 kHz, with high losses due to tail current. With SiC-MOSFETs, the switching frequency is increased, resulting in smaller filter volumes. The SiC module allowed operation at frequencies in the tens and hundreds of kHz, with relatively low switching losses, which significantly reduced the volume of filters and heat transfer systems. These technological advancements resulted in reductions of up to 78% in the total volume and improved efficiency, enabling operation at lower temperatures and potentially increasing the lifetime of components.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3388-3401"},"PeriodicalIF":1.8,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel Family of Single-Phase Direct Buck AC-AC Converters With Continuous Input Current, Reduced Components, and Balanced Power Losses","authors":"Alireza Lahooti Eshkevari,&nbsp;Iman Abdoli,&nbsp;Mostafa Karimi Hajiabadi","doi":"10.1002/cta.4296","DOIUrl":"https://doi.org/10.1002/cta.4296","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper introduces a single-phase step-down AC-AC converter designed for voltage sag/swell compensation applications. The converter features a minimal component count, continuous input current, and high efficiency, although only one power switch operates at a high frequency per input voltage half-cycle. It offers a linear and broad voltage conversion ratio (<i>D</i>) without right-half-plane zeros in its small-signal transfer function, simplifying the controller design. The proposed converter does not need dead time. It ensures balanced voltage and current stresses and power losses among power switches, easing the selection of semiconductors. Compared with existing topologies, it excels in total capacitor voltage, switching device power, and volume metrics of capacitors and inductors, thereby reducing cost and size. Experimental results from a 250-W prototype demonstrate a peak efficiency of 94.8% and effective voltage sag/swell mitigation as a DVR.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3375-3387"},"PeriodicalIF":1.8,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Balanced Switchable Bandpass Filter With All-Port Reflectionless and Common-Mode Suppression Characteristics","authors":"Zicheng Wang,&nbsp;Zhongbao Wang,&nbsp;Hongmei Liu,&nbsp;Mingming Gao,&nbsp;Shaojun Fang","doi":"10.1002/cta.4321","DOIUrl":"https://doi.org/10.1002/cta.4321","url":null,"abstract":"<div>\u0000 \u0000 <p>A novel balanced switchable bandpass filter with all-port reflectionless characteristics is proposed in this paper. The balanced switchable bandpass filter comprises a balanced switchable filtering section with bandpass response and two absorptive networks. The absorptive network proposed in this paper adopts only one structure to achieve both differential- and common-mode reflectionless characteristics. The proposed switchable resonators in the filtering section and the proposed absorption networks excited under even- and odd-modes are analyzed in detail. For the purpose of verification, a prototype is manufactured based on the simulated results, and it has a good consistency. The experimental results exhibit that the proposed balanced bandpass filter exhibits a differential-mode bandpass filtering function and all-port reflectionless performance in the ON-state, differential-mode isolation function, common-mode suppression, and reflectionless behavior in the OFF-state, which verifies the feasibility of the design theory.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3638-3645"},"PeriodicalIF":1.8,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Performance of In-Direct Matrix Converter Through Improved PWM Techniques for Reduced Switching Loss and Optimal DC-Link Voltage","authors":"Sajid Ahmad Khanday,&nbsp;Abdul Hamid Bhat,&nbsp;Obbu Chandra Sekhar","doi":"10.1002/cta.4286","DOIUrl":"https://doi.org/10.1002/cta.4286","url":null,"abstract":"<div>\u0000 \u0000 <p>This article presents a comprehensive investigation into the improved operation of an in-direct matrix converter (IMC) through the application of improved pulse width modulation (PWM) techniques. Matrix converters (MCs) draw a discontinuous and distorted input current from the AC source, reducing the input power factor and increasing harmonics. The primary objectives of this work are to maximize the DC-link voltage and improve source current while simultaneously minimizing switching losses and the total harmonic distortion (THD) of the load voltage, thereby improving power quality standards. To achieve these goals, a symmetrical space vector PWM technique (SSVPWM) is employed on the rectifier side, and an improved bus-clamping PWM technique (BCPWM) is implemented on the inverter side. By strategically controlling the switching patterns, the DC-link voltage is maximized while adhering to the voltage and current constraints of the switching devices, which improves the input power factor and hence the overall power quality. Additionally, this technique optimizes the operation of the IMC, leads to a reduction of current ripple, and reduces switching losses, thereby leading to higher efficiency. The core principle behind this research lies in the decoupled control of the rectifier and inverter stages, allowing for independent optimization and maximum system performance. By carefully manipulating the modulation indices, the harmonic content in the output voltage is significantly minimized which is vital for applications requiring a high-quality and low-distortion power supply. Simulation studies substantiate the efficacy of the independent control approach, showcasing improvements in DC-link voltage maximization, switching loss reduction, and reduced output voltage THD. Furthermore, the validation of the real-time implementation of this study was carried out making use of the OPAL-RT (OP4510) real-time simulator.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"53 6","pages":"3304-3323"},"PeriodicalIF":1.8,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}