Article
Electrochemistry
Chuangshi Qi, Shunli Wang, Wen Cao, Yanxin Xie, Mingdong Lei
Summary: This paper establishes a Hysteresis Characteristic-Electrical Equivalent Circuit (HC-EEC) modeling and proposes an Online Multi-Time Scale Adaptive Parameter Identification Strategy (OM-TSAPIS) to accurately identify battery model parameters, which improves the parameter identification accuracy of the HC-EEC model.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Gurhan Ozkayar, Zhilin Wang, Joost Lotters, Marcel Tichem, Murali Krishna Ghatkesar
Summary: In this study, parallel connection of piezoelectric micropumps and multi-phase rectification were used to minimize ripples at low flow rates. The fluidic ripple factor was reduced by more than 90% compared to one-phase rectification.
Article
Engineering, Electrical & Electronic
Zhao Zhang, Guang Zhu, C. Patrick Yue
Summary: This article introduces an ultra-low-voltage phase-locked loop (ULVPLL) with a minimum supply voltage of 0.25 V. By utilizing an offset dual-path loop architecture and dynamic CP design, the ULVPLL achieves efficient operation at low voltages while reducing power consumption and circuit complexity.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2021)
Article
Thermodynamics
Fan Jia, Xiang Yin, Feng Cao, Jianmin Fang, Anci Wang, Xixi Wang, Lichen Yang
Summary: This study investigated the operating characteristics of CO2 heat pumps under inappropriate refrigerant charge conditions using an experimental setup and a mathematical model. It revealed the relationship between refrigerant charge states, refrigerant distribution, and optimal discharge pressure, and proposed a novel control method based on refrigerant distribution regulation to enhance system performance.
Article
Engineering, Manufacturing
Han-Joo Lee, Jorge Canada, Luis Fernando Velasquez-Garcia
Summary: This study presents the design, fabrication, and characterization of the first 3D-printed peristaltic pumps for creating and maintaining dry vacuum in compact systems. The pumps utilize a novel actuator design that requires less force to seal, enabling low vacuum at low actuation speed. The devices are made of PLA and FiberFlex 40D, with the latter demonstrating satisfactory fatigue life and hyperelastic behavior. Experimental characterization shows that the prototypes achieve significantly lower base pressure compared to a state-of-the-art diaphragm vacuum pump. The technology is important for in-situ, low-waste manufacturing in remote areas, including space applications.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Electrical & Electronic
Abdul Basir, Izaz Ali Shah, Hyoungsuk Yoo
Summary: This study introduces a sphere-shaped (Rxs) coil to improve the power transfer efficiency of wireless power transfer systems for implantable devices, along with a high-efficiency voltage doubler as a rectifier. The Rxs coil shows improved and stabilized PTE under different misalignment conditions.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Xuetao Zeng, Xuan Zhang, Lei Yao, Ning Xue
Summary: This paper presents the design and implementation of an energy efficient high-voltage pulse generator for MEMS capacitive sensors and actuators. By employing methods such as dynamic output impedance and load energy recycling, the circuit achieves a relatively high end-to-end energy efficiency.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Engineering, Electrical & Electronic
C. Nagesha, N. Lakshminarasamma
Summary: A reconfigurable gain circuit is proposed for an LCLC resonant converter with bidirectional capability considering wide varying redox flowbattery source. A suitable hybrid control scheme is proposed for LCLC resonant converter with secondary synchronous rectifier. The proposed circuit enables the configuration of secondary bridge as an active voltage doubler, full-bridge circuit in forward and reverse power transfer modes, respectively. The reconfigurability helps in designing a transformer with lower secondary turns and achieving desired high gain. The presence of LCLC resonant tank provides additional gain; the hybrid control scheme ensures zero-voltage switching turn-ON for the primary and secondary synchronous MOSFETs. The proposed converter is analysed using fundamental harmonic approximation and experimentally verified for an 800 V/1 kW hardware prototype fed from 24 to 54 V input.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Energy & Fuels
Qiguo Han, Xing Wang, Pengfei Hu, Maolin Wang, Xu Luo, Weihua Hou
Summary: This paper proposes a generator based on a common three-phase inverter circuit that can simulate multiple modes of voltage sag and swell. The developed control strategies achieve accurate output and flexible adjustment through double closed-loop control and neutral voltage balance control. Simulation and experiment results verify the effectiveness of the proposed generator in emulating power grid voltage sag and swell phenomena under IEEE 1159 and IEC standards.
Article
Engineering, Electrical & Electronic
Snehal Bagawade, Majid Pahlevani, Praveen Jain
Summary: In this article, a novel soft-switched isolated dc-dc converter topology is proposed, which utilizes a resonant power feedback circuit to regulate the input voltage of the main power converter. This input voltage regulation enables a near-constant phase-shift angle and a high-frequency current waveform over various operating conditions. The additional resonant current in the feedback circuit also extends the range of soft-switched operation of semiconductor devices in the converter. The proposed topology and its theoretical analysis are verified through an experimental prototype.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Seung-Won Jo, Nam-Gyeong Kim, Myeong-Hwan Kim, Min-Jae Kim, Minsung Kim
Summary: This article presents a full-bridge resonant AC/DC converter that minimizes switching loss over the entire grid voltage cycle. By utilizing the voltage fluctuation at a T-type voltage doubler, the converter achieves zero-voltage switching at high output power and improved efficiency.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Andrea Ballo, Alfio Dario Grasso, Gaetano Palumbo, Toru Tanzawa
Summary: This tutorial provides an overview of charge pump topologies for managing self-powered nodes in ultra-low-power applications, such as Internet of Things nodes. It discusses design equations, recent proposed topologies, and regulation schemes, giving insight into the state-of-the-art of integrated topologies.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Physics, Multidisciplinary
Marius Juergensen, Mikael C. Rechtsman
Summary: The research reveals that under low-power conditions, the transport of nonlinear Thouless pumps for bosons is influenced by the Chern number of the soliton-separated band. By expanding the equation on the basis of Wannier states, it is demonstrated that the position of the soliton is determined by the position of the Wannier state throughout the pump cycle. Furthermore, soliton pumping in two dimensions is described.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Wuke Xu, Yuewang Yang, Fan Shi, Liangyu Li, Fuzhen Wen, Qing Chen
Summary: This paper presents a non-invasive subsurface ultrasonic array imaging method for the detection and characterization of gases generated inside commercial Li-ion batteries (LIBs). The feasibility of the proposed method is validated through experiments, and the evolution and accumulation of gases are visualized and characterized through a long-term cycling experiment.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Islam Mansour, Marwa Mansour, Mohamed Aboualalaa
Summary: This study introduces a wideband, high-efficiency, and high DC voltage RF-DC converter utilizing ROG4003C material and Schottky diode for energy harvesting systems. The input matching network is designed using a pi network and series resonance circuit. Two wideband rectifiers are designed, one using lumped inductors and the other using distributed rectangular inductors. The proposed rectifiers provide good performance over a wide input power range and are suitable for various systems.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2023)