International Journal of Circuit Theory and Applications最新文献_第5页

Design and Implementation of Switched-Capacitor-Buck Converter With Improved Light Load Efficiency 提高轻载效率的开关电容降压变换器的设计与实现

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-23 DOI: 10.1002/cta.70289

Zhangyong Chen, Lei Ren, Yunfeng Wu, Xin Tong, Zhijie Luo

引用次数: 0

Automatic Calibration of Frequency Response for AC Attenuators in Precision Voltage Measurements 精密电压测量中交流衰减器频率响应的自动校准

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-23 DOI: 10.1002/cta.70290

Hongjun Hu, Haixia Song, Qiang Luo

{"title":"Automatic Calibration of Frequency Response for AC Attenuators in Precision Voltage Measurements","authors":"Hongjun Hu, Haixia Song, Qiang Luo","doi":"10.1002/cta.70290","DOIUrl":"https://doi.org/10.1002/cta.70290","url":null,"abstract":"<div>\u0000 \u0000 <p>Conventional RC divider–based attenuators in precision AC voltage measurement are highly susceptible to parasitic parameters. This issue causes fluctuating attenuation ratios at high frequencies and degrades signal transmission accuracy. To address this, a novel calibration method is proposed to stabilize frequency response through capacitive compensation and feedback adjustment. A calibration model is first established by mapping the time- and frequency-domain responses, explicitly accounting for real-life parasitic effects. Guided by this model, an automatic frequency compensation system and a corresponding timing diagram are designed. The method is validated through simulation and experiment using a 100:1 AC attenuator for covering 300 V RMS measurement. Results demonstrate markedly improved performance: The low-voltage (LV) attenuation achieves a response flatness of 0.43% in the 10 Hz to 100 kHz band and 0.59% in the 10 Hz to 1 MHz band, whereas the high-voltage (HV) attenuation shows 0.68% flatness in the 10 Hz to 100 kHz frequency band. Additionally, the design exhibits excellent linearity better than 41 ppm and minimal temperature drift.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"54 8","pages":"4371-4383"},"PeriodicalIF":1.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662899","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

Realizing Trade-OFFs in Virtual Voltage Vector Based Model Predictive Control of 3 ∅ to 6 ∅ MC to Suppress the Common Mode Voltage 基于虚拟电压矢量的3∅to 6∅MC模型预测控制抑制共模电压的权衡实现

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-18 DOI: 10.1002/cta.70266

Manoj A. Waghmare, Bhimrao S. Umre, Mohan V. Aware

{"title":"Realizing Trade-OFFs in Virtual Voltage Vector Based Model Predictive Control of 3 \u0000\u0000 ∅ to 6 \u0000\u0000 ∅ MC to Suppress the Common Mode Voltage","authors":"Manoj A. Waghmare, Bhimrao S. Umre, Mohan V. Aware","doi":"10.1002/cta.70266","DOIUrl":"https://doi.org/10.1002/cta.70266","url":null,"abstract":"<div>\u0000 \u0000 <p>The impact of common mode voltage (CMV) on induction motor life is significant under non-sinusoidal terminal voltage. In the advent of matrix converters for multi-phase drives pose a challenge not only to reduce CMV but also to maintain the load current total harmonic distortion (THD) within the acceptable limits. Hence, the matrix converter (MC) performance is attributed to CMV reduction, load current THD minimization and supply side UPF maintenance which together is difficult to attend without any trade-off. This paper presents a three-phase to six-phase matrix converter (\u0000<span></span><math>\u0000 <mn>3</mn>\u0000 <mo>∅</mo>\u0000 <mtext>to</mtext>\u0000 <mspace></mspace>\u0000 <mn>6</mn>\u0000 <mo>∅</mo></math> MC) with virtual vector-based predictive control. In the classical predictive control selective utilization of the available voltage vectors, could lead to CMV reduction at the cost of the increase in the load current THD. The proposed predictive control is derived with selective virtual voltage vector formation to reduce the CMV while maintaining the load current THD within the limits. The trade-off between CMV and THD is achieved by using a decisive weighting factor in the cost function. The performance of the \u0000<span></span><math>\u0000 <mn>3</mn>\u0000 <mo>∅</mo>\u0000 <mtext>to</mtext>\u0000 <mspace></mspace>\u0000 <mn>6</mn>\u0000 <mo>∅</mo></math> MC, such as efficiency improvement with supply side unity power factor (UPF) is also achieved. This control algorithm is executed using a low-cost dsPIC processor and verified experimentally to validate the effectiveness of the proposed algorithm.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"54 8","pages":"4223-4234"},"PeriodicalIF":1.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662678","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 New Compensated Rectifier for Wireless Energy Harvesting System With Low Start-Up Voltage and High Sensitivity 一种新型低启动电压高灵敏度无线能量采集系统补偿整流器

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-18 DOI: 10.1002/cta.70244

Feng Shi, Haozhe Jia, Xiaochao Li, Yongqian Du

{"title":"A New Compensated Rectifier for Wireless Energy Harvesting System With Low Start-Up Voltage and High Sensitivity","authors":"Feng Shi, Haozhe Jia, Xiaochao Li, Yongqian Du","doi":"10.1002/cta.70244","DOIUrl":"https://doi.org/10.1002/cta.70244","url":null,"abstract":"<div>\u0000 \u0000 <p>This work presents a compensated rectifier with a compensation state adjudicate (CSA) circuit for wireless power harvesting, which jointly optimizes sensitivity, power conversion efficiency (PCE), start-up voltage, and settling time. The current mirror-based threshold compensation enhances the voltage gain and PCE by reducing the threshold voltage loss. However, under low input RF voltage and a heavy load conditions, the threshold compensation may become ineffective. To address this issue, a CSA circuit is introduced to isolate the rectifier load and reduce the load current before the threshold compensation voltage is established. As a result, both the start-up voltage and the load range of the proposed rectifier are improved. Moreover, the start-up time is also reduced benefited from CSA. The proposed compensated rectifier with CSA is designed in a commercial 65-nm CMOS process. Its performance was evaluated through comprehensive simulations of key rectifier parameters, confirming well-balanced performance optimization. Simulation results demonstrate a peak PCE of 42%, along with a sensitivity of −21.2 dBm and a start-up voltage of 280 mV for the CSA-equipped rectifier, representing improvements of more than 0.7 dBm and 40 mV, respectively, compared to the non-CSA architecture. Furthermore, by isolating the load from the main rectifier before the threshold compensation is established, the settling time is significantly shortened, and the allowable load range is extended down to 20 kΩ.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"54 8","pages":"4137-4146"},"PeriodicalIF":1.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662691","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

Integrated WPT and OBC Architecture for Electric Vehicles With a Single-Layer Parallel-Wound Coil Structure 基于单层并联线圈结构的电动汽车WPT和OBC集成体系结构

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-19 DOI: 10.1002/cta.70265

Gangjie Qiao, Yanjin Hou, Qianfang Sun, Jingli Zhang, Yuandi Zhao, Zhizhen Liu

{"title":"Integrated WPT and OBC Architecture for Electric Vehicles With a Single-Layer Parallel-Wound Coil Structure","authors":"Gangjie Qiao, Yanjin Hou, Qianfang Sun, Jingli Zhang, Yuandi Zhao, Zhizhen Liu","doi":"10.1002/cta.70265","DOIUrl":"https://doi.org/10.1002/cta.70265","url":null,"abstract":"<div>\u0000 \u0000 <p>Electric vehicles (EVs) typically rely on two independent systems for wireless power transfer (WPT) and conductive charging. This paper introduces a fully integrated charging architecture that unifies both charging functionalities into a single hardware platform. The core of the proposed system is a single-layer parallel-wound dual-coil structure, which replaces the conventional transformer in the CLLC resonant converter and enables full resonant capacitor sharing between the onboard charger (OBC) and WPT receiver. Unlike prior dual-layer coil designs, the proposed structure not only supports high-frequency OBC operation but also maintains strong magnetic coupling essential for WPT. By incorporating a compensating inductor for circuit symmetry and a DC-side series connection in WPT mode, the system achieves complete hardware integration without additional AC-side switching. Experimental results demonstrate that the DC–DC stage maintains efficiency above 96% across the operating range, validating the feasibility of a compact, cost-effective, and compatibility-assured dual-mode charging solution.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"54 8","pages":"4289-4302"},"PeriodicalIF":1.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662693","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 Wireless Power Transfer System Based on Dual-Frequency Switching for Dual Constant Voltage Supplies 基于双频开关的双恒压电源无线电力传输系统

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-14 DOI: 10.1002/cta.70264

Le Yu, You Lv, Shujia Xu, Changsong Cai, Lin Yang

{"title":"A Wireless Power Transfer System Based on Dual-Frequency Switching for Dual Constant Voltage Supplies","authors":"Le Yu, You Lv, Shujia Xu, Changsong Cai, Lin Yang","doi":"10.1002/cta.70264","DOIUrl":"https://doi.org/10.1002/cta.70264","url":null,"abstract":"<div>\u0000 \u0000 <p>Wireless power transfer (WPT) systems with constant voltage (CV) output function are widely used in various fields due to their stable performance, strong compatibility, and high safety. However, existing WPT systems with multiple specifications CV output have many problems, including cross-coupling between multiple coils, low system space utilization, and complex closed-loop control. To this end, this article proposes a WPT system with two specifications CV output. By switching between two fixed operating frequencies, the system can be equivalently configured as two typical compensation structures: CLC-S and S-LCC, thereby achieving two different specifications of CV output and zero phase angle (ZPA) operation. The proposed system can provide a simple and reliable solution for industrial application scenarios that require multiple CV outputs and has the advantage of not requiring complex closed-loop control design and tedious system design. Finally, a verification test prototype with CV output of 40 and 70 V is built, and the experimental results verified the feasibility of the theoretical analysis.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"54 8","pages":"4173-4180"},"PeriodicalIF":1.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662051","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

Lyapunov Control Strategy for Full-Bridge Inverter-Based UPS Applications Using Load Current Estimator 负载电流估计器在全桥逆变器UPS应用中的Lyapunov控制策略

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-16 DOI: 10.1002/cta.70259

Ozan Gulbudak, Mustafa Gokdag, Burhan Hukumen

{"title":"Lyapunov Control Strategy for Full-Bridge Inverter-Based UPS Applications Using Load Current Estimator","authors":"Ozan Gulbudak, Mustafa Gokdag, Burhan Hukumen","doi":"10.1002/cta.70259","DOIUrl":"https://doi.org/10.1002/cta.70259","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper presents a Lyapunov control method to regulate the uninterruptible power supply (UPS) dynamics. The single-phase full-bridge inverter is considered for UPS application, and the converter dynamics are controlled under unknown load conditions. UPS systems operate under specific output voltage characteristics. The current drawn from the UPS varies depending on the load connected to the UPS output. The model of the load is usually unknown, and the information for the load current is necessary to obtain a well-regulated closed-loop implementation. The Lyapunov control strategy uses the energy function to determine the control input. The determination of the control signal is based on the stability criterion of the Lyapunov control method; the selection of the control signal must ensure the asymptotic stability rule. However, the information on the load current is mandatory to achieve a fully regulated energy conversion operation. Thus, the load current is measured in most applications for simplicity. This paper proposes a Lyapunov control strategy using a model-based reference generator and load current observer. The proposed method uses the state observer to estimate the load current under unknown load conditions. The model-based reference generator produces the inductor current reference, and an inner Lyapunov regulator controls the inductor current. The mathematical concepts are verified using the real single-phase full-bridge prototype. The proposed control algorithm is implemented using STM32H743 digital signal processor (DSP). The performance of the Lyapunov regulator, load current estimator, and the model-based reference generator is experimentally investigated. According to the experimental results, the proposed control approach provides a robust and suitable UPS operation under unknown load conditions.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"54 8","pages":"4181-4194"},"PeriodicalIF":1.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662545","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

Nonsingular Terminal Sliding Mode Control of Three-Phase Inverter Without Current Sensor 无电流传感器三相逆变器的非奇异终端滑模控制

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-18 DOI: 10.1002/cta.70263

Xinyu Liu, Yunlong Liu, Wei Wang, Jianchao Zhao, Chengyong Ren

{"title":"Nonsingular Terminal Sliding Mode Control of Three-Phase Inverter Without Current Sensor","authors":"Xinyu Liu, Yunlong Liu, Wei Wang, Jianchao Zhao, Chengyong Ren","doi":"10.1002/cta.70263","DOIUrl":"https://doi.org/10.1002/cta.70263","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper mainly introduces the output voltage control of the three-phase inverter without current sensor. Aiming at internal parameter perturbation and external unknown disturbance, a generalized proportional integral observer (GPIO) is designed to observe the lumped interference and feedforward compensation. Then, a finite-time control strategy based on nonsingular terminal sliding mode control (NTSMC) is designed to improve control accuracy and fault tolerance under various interference. Compared with traditional PI control and sliding mode control (SMC), this strategy has the finite-time convergence of voltage tracking error and active anti-interference ability. The stability of the proposed control strategy is proved strictly. Finally, the simulation results show that in the presence of interference, the proposed control strategy has better robustness and smaller chattering. The feasibility and effectiveness of the controller are fully illustrated by exploring the experimental results. This controller eliminates the current sensor and has active anti-interference capability. The output voltage chattering and overshoot under interference conditions are both significantly attenuated.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"54 8","pages":"4235-4244"},"PeriodicalIF":1.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662687","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 Y-Source High Step-Up Soft-Switching Converter With Continuous Input Current 具有连续输入电流的y源高升压软开关变换器

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-18 DOI: 10.1002/cta.70255

Desheng Rong, Changxuan Li, Xuanjin Sun, Yadong Han, Zhongbao Lin, Wenguang Tang

引用次数: 0

A New Compensated Rectifier for Wireless Energy Harvesting System With Low Start-Up Voltage and High Sensitivity 一种新型低启动电压高灵敏度无线能量采集系统补偿整流器

IF 1.4 3区工程技术

International Journal of Circuit Theory and Applications Pub Date : 2026-08-03 Epub Date: 2025-12-18 DOI: 10.1002/cta.70244

Feng Shi, Haozhe Jia, Xiaochao Li, Yongqian Du

{"title":"A New Compensated Rectifier for Wireless Energy Harvesting System With Low Start-Up Voltage and High Sensitivity","authors":"Feng Shi, Haozhe Jia, Xiaochao Li, Yongqian Du","doi":"10.1002/cta.70244","DOIUrl":"https://doi.org/10.1002/cta.70244","url":null,"abstract":"<div>\u0000 \u0000 <p>This work presents a compensated rectifier with a compensation state adjudicate (CSA) circuit for wireless power harvesting, which jointly optimizes sensitivity, power conversion efficiency (PCE), start-up voltage, and settling time. The current mirror-based threshold compensation enhances the voltage gain and PCE by reducing the threshold voltage loss. However, under low input RF voltage and a heavy load conditions, the threshold compensation may become ineffective. To address this issue, a CSA circuit is introduced to isolate the rectifier load and reduce the load current before the threshold compensation voltage is established. As a result, both the start-up voltage and the load range of the proposed rectifier are improved. Moreover, the start-up time is also reduced benefited from CSA. The proposed compensated rectifier with CSA is designed in a commercial 65-nm CMOS process. Its performance was evaluated through comprehensive simulations of key rectifier parameters, confirming well-balanced performance optimization. Simulation results demonstrate a peak PCE of 42%, along with a sensitivity of −21.2 dBm and a start-up voltage of 280 mV for the CSA-equipped rectifier, representing improvements of more than 0.7 dBm and 40 mV, respectively, compared to the non-CSA architecture. Furthermore, by isolating the load from the main rectifier before the threshold compensation is established, the settling time is significantly shortened, and the allowable load range is extended down to 20 kΩ.</p>\u0000 </div>","PeriodicalId":13874,"journal":{"name":"International Journal of Circuit Theory and Applications","volume":"54 8","pages":"4137-4146"},"PeriodicalIF":1.4,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148662692","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