International Journal of Circuit Theory and Applications最新文献_第10页

High gain bipolar converter with reduced input current ripple for fuel cell integrated DC microgrid 用于燃料电池集成直流微电网的高增益双极转换器，可降低输入电流纹波

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-19 DOI: 10.1002/cta.4174

Ashish Prajapati, Kalpana Chaudhary

引用次数: 0

Design of a multi‐octave high‐efficiency power amplifier employing a modified continuous class‐GF mode 设计采用改进型连续 GF 类模式的多倍频程高效功率放大器

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-18 DOI: 10.1002/cta.4194

Haipeng Zhu, Zhiwei Zhang, Xuefei Xuan, Chenlu Wang, Luyu Zhang, Chao Gu

引用次数: 0

A novel multimode constant magnetizing current battery equalizer with few sensors in electric vehicles 新型多模恒定磁化电流电池均衡器，传感器数量少，适用于电动汽车

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-18 DOI: 10.1002/cta.4165

Runmin Zou, Wenqi Zhou, Ji Wang

引用次数: 0

Performance analysis of fractional‐order modified SRF PLL under grid abnormalities 电网异常情况下分数阶修正 SRF PLL 的性能分析

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-18 DOI: 10.1002/cta.4161

Oinam Lotika Devi, Alka Singh

{"title":"Performance analysis of fractional‐order modified SRF PLL under grid abnormalities","authors":"Oinam Lotika Devi, Alka Singh","doi":"10.1002/cta.4161","DOIUrl":"https://doi.org/10.1002/cta.4161","url":null,"abstract":"This article proposes two different structures of fractional‐order modified synchronous reference frame phase‐locked loop (MSRF PLL) and discusses their performance under different grid abnormalities. Phase‐locked loop (PLL) is a type of closed‐loop feedback control system that ensures phase and frequency coherence between its input and output signals. The basic synchronous reference frame phase‐locked loop (SRF‐PLL) is a conventional synchronization technique that is frequently employed in grid‐connected systems for power electronic converters. The SRF‐PLL offers rapid and precise phase/frequency detection under ideal grid environments. However, its performance is severely hampered under unbalanced and distorted grid environments. This paper discusses two new configurations of fractional‐order (FO) modified SRF (MSRF), one with fractional order only in additional low‐pass filter of first order (FO‐LP) and another fractional order in both first‐order low‐pass filter and PI (FO‐LPFO‐PI) of MSRF. These controllers are assembled using FOs “a” and “b” with limits as 0 < a < 2 and 0 < b < 2. The performance analysis of proposed FO MSRFs is done under grid abnormalities like voltage sag and swell, polluted grid supply, frequency change, phase change, and variables for dc offset. The outcomes of simulation are acquired using FO modeling and control (FOMCON) toolbox for MATLAB/SIMULINK, and the experimental results are validated with simulation results. A fair comparison among the MSRF‐PLL, FO‐LP MSRF‐PLL, and FO‐LPFO‐PI MSRF‐PLL is also depicted during grid abnormalities.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737417","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}

引用次数: 0

Design and optimization of 30 kW CLLLC resonant converter for vehicle‐to‐grid applications 设计和优化用于车联网应用的 30 千瓦 CLLLC 谐振转换器

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-17 DOI: 10.1002/cta.4181

Donghao Tian, Yu Tang, Zhe Shi

{"title":"Design and optimization of 30 kW CLLLC resonant converter for vehicle‐to‐grid applications","authors":"Donghao Tian, Yu Tang, Zhe Shi","doi":"10.1002/cta.4181","DOIUrl":"https://doi.org/10.1002/cta.4181","url":null,"abstract":"The CLLLC resonant converter is a promising technology for electric vehicles and microgrids due to its ability to operate bidirectionally. This article presents a design of a bidirectional CLLLC resonant converter that is applied in the vehicle‐to‐grid (V2G). The battery side of the converter uses a two‐channel parallel structure to enhance its efficiency and reliability. In contrast, the DC‐bus side uses a transformer series structure to obtain the benefits of passive current sharing on the secondary side and reduce the transformer turns ratio. By utilizing the proposed design method, the converter can achieve a wide input and output voltage range, high efficiency, and high power density. The article analyzes the working principle of the converter and explains the design process, which includes the transformer turns ratio, magnetizing inductance, and resonance parameters. Finally, an experimental prototype is produced to verify the theory's validity and the design's feasibility. The prototype has a DC‐bus side voltage of 660–860 V, a battery side voltage of 250–500 V, and a maximum power output of 30 kW. The peak efficiency of the prototype is 98.2%, and its power density can reach up to 8 kW/L.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737419","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}

引用次数: 0

A 40.3–50.5 GHz locking range transformer‐based injection‐locked frequency divider utilizing a high third harmonic rejection buffer 利用高三次谐波抑制缓冲器的 40.3-50.5 GHz 锁定范围变压器式注入锁定分频器

IF 1.8 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-15 DOI: 10.1002/cta.4189

Xinsheng Wang, Yanhong Song, Xiyue Wang

引用次数: 0

An efficient three‐phase two‐level voltage source inverter with the suppression of the dead time effect 抑制死区时间效应的高效三相两电平电压源逆变器

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-12 DOI: 10.1002/cta.4180

Qiang Wang, Xiang Gong, Youzheng Wang

{"title":"An efficient three‐phase two‐level voltage source inverter with the suppression of the dead time effect","authors":"Qiang Wang, Xiang Gong, Youzheng Wang","doi":"10.1002/cta.4180","DOIUrl":"https://doi.org/10.1002/cta.4180","url":null,"abstract":"The paper carries out the research on a novel two‐level voltage source inverter to further improve the output power quality of the inverter under the premise of efficient operation. Main switches can realize zero‐voltage switching in a wide load range to ensure the efficient operation of the designed inverter. Total harmonic distortion (THD) of the output current at low output frequencies can be improved by the modification of resonant tanks in the designed inverter. In the dead time, the modified resonant tanks can result in a shorter duration of nonlinear changes in the output phase voltage at lower load current, which is beneficial for reducing the output voltage error caused by dead time. The improved power quality at low output frequencies is conductive to the use of the designed inverter in the drive system of the low‐speed AC motor. The paper expounds every operating status during a switching period. The experiment manifests that switches realize soft switching. The efficiency of the designed inverter reaches 98.6% at rated operation state, which is 0.3% and 0.5% more than that of two comparison objects, respectively. Moreover, when the output frequency reduces to 5 Hz, the THD of the output current is only 2%, which is also less than that of comparison objects. Hence, the designed inverter has advantages in the efficiency and the output power quality.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610813","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}

引用次数: 0

A wide tuning range CMOS differential ring VCO using an active inductor for wireless applications 使用有源电感器的宽调谐范围 CMOS 差分环形 VCO，适用于无线应用

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-12 DOI: 10.1002/cta.4155

Mahdi Alijani, Mohammadmahdi Javanmardi, Adib Abrishamifar

{"title":"A wide tuning range CMOS differential ring VCO using an active inductor for wireless applications","authors":"Mahdi Alijani, Mohammadmahdi Javanmardi, Adib Abrishamifar","doi":"10.1002/cta.4155","DOIUrl":"https://doi.org/10.1002/cta.4155","url":null,"abstract":"A differential ring voltage‐controlled oscillator (DRVCO) is proposed in this paper as one of the critical blocks in communication systems. It consists of four stages of delay cells connected in a chain, creating a ring structure with auxiliary path interconnections. The oscillation frequency of the DRVCO can be controlled by adjusting the tuning voltage that controls the charging current. To achieve the desired performance for wireless applications, the Wu active inductor, which is a low‐noise and high‐quality factor active inductor, is employed in each delay cell for the first time. Using an active inductor provides a wide tuning range and also allows for proper phase noise and low power consumption. The proposed circuit is designed and simulated using standard 180‐nm CMOS technology with a 1.8‐V voltage source (VDD). The circuit is designed to achieve a tuning range of 2.15 GHz with a center frequency oscillation of 2.745 GHz, over the control voltage variation of 1.4 V (0 to 1.4 V). To achieve the desired performance, the circuit consumes an average power of 1.99 mW. It achieves a phase noise of − 91.2 dBc/Hz at 1 MHz offset frequency, indicating effective noise suppression. The figure of merit (FoM) for the circuit is − 156.9 dBc/Hz, representing its overall performance. The final layout of the circuit estimates an area of 0.00072 mm2. Various analyses, including Monte–Carlo simulations, PVT (process, voltage, temperature) variation analysis, and other relevant analyses, have been performed to ensure the reliable performance of the proposed circuit.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610812","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}

引用次数: 0

Dual‐frequency three‐dimensional wireless power transfer system to achieve two‐channel independent maximum power transfer 实现双通道独立最大功率传输的双频三维无线功率传输系统

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-11 DOI: 10.1002/cta.4172

Hanbing Dan, Yuqian Chao, Zixi Liu, Xueqing Liu, Qi Zhu, Mei Su

引用次数: 0

Improved gray prediction parameter identification sliding mode current control of experimental advanced superconducting tokamak fast control power supply 先进超导托卡马克快速控制实验电源的改进型灰色预测参数识别滑模电流控制

IF 2.3 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2024-07-11 DOI: 10.1002/cta.4183

Zhao Chen, Haihong Huang, Haixin Wang

{"title":"Improved gray prediction parameter identification sliding mode current control of experimental advanced superconducting tokamak fast control power supply","authors":"Zhao Chen, Haihong Huang, Haixin Wang","doi":"10.1002/cta.4183","DOIUrl":"https://doi.org/10.1002/cta.4183","url":null,"abstract":"Experimental advanced superconducting tokamak (EAST) fast control power supply (FCPS) is an essential device to realize balance control of plasma vertical displacement during controllable nuclear fusion process. The primary control purpose of EAST FCPS is to quickly output current to track reference current. Change of load inductance parameters due to plasma motion poses higher robustness requirements for fast tracking control of output current. Therefore, an improved gray prediction parameter identification sliding mode control method is proposed to achieve fast tracking and robust control of output current under changes in load inductance parameters. Parameter identification sliding mode control method applied to identify load inductance parameters in real‐time, accurate EAST FCPS output current tracking sliding mode control model is established. High‐order terms are added to discrete exponential convergence reaching law, and a new smooth saturation function is designed to replace traditional sign function to achieve chattering suppression and accelerate system convergence speed. Gray prediction used in current sampling to achieve output current trajectory advanced prediction to further accelerate output current response speed. Four times equal interval time sampling within a fixed switching period and new information priority period by period prediction is proposed to improving gray prediction, achieving digital control delay compensation, and improving prediction accuracy of output current trajectory at abrupt edge. Simulation and experimental verification show that the proposed improved gray prediction parameter identification sliding mode control method has good output current tracking control performance under changes in load parameters. Compared with PI control method currently used in engineering, the proposed control method performs better in output current fast response and overshoot suppression.","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610814","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}

引用次数: 0