Article
Engineering, Electrical & Electronic
Linsen Huang, Jinghua Ji, Wenxiang Zhao, Tao Tao, Jia Cui
Summary: This article proposes a new duty-ratio-based direct torque control (DR-DTC) with enhanced harmonic current suppression for a dual-three-phase permanent magnet (DTP-PM) motor. A new virtual voltage vector construction method and an online harmonic current compensation method are introduced. The proposed strategy improves the capability of harmonic current suppression and simplifies the virtual voltage construction process.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Environmental
Ying He, Guomin Yang, Jinwen Zhao, Kejun Tan, Ruo Yuan, Shihong Chen
Summary: This study presents a novel ECL ratio sensing strategy based on a single luminophore, eliminating the need for exogenous coreactants. By detecting the change in the ratio of two signals, highly sensitive detection of organophosphorus pesticides (OPs) was achieved.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Desheng Zhang, Liangliang Lu, Wei Song, Run Min, Qiaoling Tong, Qiao Zhang, Han Peng, Keliang Zhou
Summary: This article presents an optimal duty ratio assisted pulse frequency modulation control for very high frequency isolated class E dc-dc converter. The proposed control achieves continuous power flow and optimal switch timing, reducing output ripple and power loss. A resonant fitting model is established to derive the optimal duty ratio and output power under dynamic switching frequency. The control is integrated with ON/OFF modulation to extend load range.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Huawei Yuan, Hin Sang Lam, Neha Beniwal, Siew-Chong Tan, Josep Pou, Shu-Yuen Ron Hui
Summary: Capacitor voltage imbalance in NPC converters is a well-known problem, and existing solutions are either costly in terms of hardware or involve complex algorithms. This article proposes a new control method called direct-switch duty-cycle control (DSDCC) that addresses the issue and achieves near-optimal performance with simple implementation. By directly considering the duty cycles of switches, DSDCC can generate gating signals with only one carrier and derive near-optimal duty cycles, simplifying the controller design. Experimental results validate the effectiveness of DSDCC with a 5L-NPC converter.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Mathematics
Abd Ur Rehman, Minsung Kim, Jin-Woo Jung
Summary: This paper presents a dual transformer-based bidirectional DC/DC resonant converter design, analysis, and control method with balanced voltage stress across all the resonant capacitors. The proposed converter features a dual-rectifier structure on the secondary side, allowing operation over a wide load range with balanced voltage stress. By using two small transformers, transformer stress is greatly reduced, reducing thermal and electrical stress on the windings. The controller consists of a feedforward control part for uncertainty compensation and a feedback control part for error convergence.
Article
Engineering, Electrical & Electronic
Paulo Roberto Ubaldo Guazzelli, Stefan Thiago Cury Alves dos Santos, Allan Gregori de Castro, William Cesar de Andrade Pereira, Carlos Matheus Rodrigues de Oliveira, Jose Roberto Boffino de Almeida Monteiro, Manoel Luis de Aguiar
Summary: This article proposes a decoupled predictive current control with duty-cycle optimization (PCC-DD) for the nine-switch converter (NSC), aiming at reducing computational burden and ripple values. The control technique separates the control of an induction generator from the grid control and reduces the enumeration of voltage vectors.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Chemistry, Analytical
Hu Zhang, Zichuan Yi, Liming Liu, Feng Chi, Yunfeng Hu, Sida Huang, Yu Miao, Li Wang
Summary: This paper proposes a new driving waveform based on high-frequency voltage optimization and electrophoresis theory to shorten the response time of three-color electrophoretic displays (EPDs). By removing an erasing stage, the response time of particles is effectively reduced.
Article
Automation & Control Systems
Chenggang Cui, Tianxiao Yang, Yuxuan Dai, Chuanlin Zhang, Qianwen Xu
Summary: This article proposes a transfer methodology for a dc-dc buck converter, which enables the implementation of a model-free deep reinforcement learning controller. The proposed methodology achieves voltage regulation, adaptability, and optimization abilities in the presence of uncertain circuit parameters and various working conditions.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Berhanu Deggefa Lemma, Srinivasan Pradabane
Summary: This work proposes a compensated duty ratio optimized direct torque control method for reducing ripple magnitude in three-phase permanent magnet synchronous motor drives. The proposed control strategy combines the simplicity of conventional DTC and compensation of the reference torque to ensure the developed torque oscillates around the desired value. The effectiveness of the control scheme is tested through simulations and experiments, demonstrating small torque and speed ripples, especially for open-end winding PMSM, and effectiveness in four-quadrant operation.
Article
Automation & Control Systems
Huihui Xiao, Tangyi Xu, Linpeng Xiang, Zhiguo Zhang, Shiyun Xie, Dong Liu
Summary: A novel variable phase-shift control strategy is proposed in this article to achieve current sharing over a wider range of duty ratio for the EDR boost converter. By adjusting the phase shifts, energy is transferred step by step to the next phase, generating high step-up output voltage. Experimental results confirm the effectiveness of the proposed control strategy.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Babak Kiani, Soodabeh Soleymani, Babak Mozafari, Hosein Mohammadnezhad Shourkaei
Summary: The paper introduces a new discrete duty cycle control strategy to reduce torque and flux ripples in the MPTC method, decreasing control system complexity and proving the effectiveness of the method in simulations and experiments.
ELECTRIC POWER COMPONENTS AND SYSTEMS
(2021)
Article
Chemistry, Analytical
Sara Knezevic, Emily Kerr, Bertrand Goudeau, Giovanni Valenti, Francesco Paolucci, Paul S. Francis, Frederic Kanoufi, Neso Sojic
Summary: Electrochemiluminescence (ECL) microscopy is a new technique used for imaging single entities and cells. In this study, a bimodal and bicolor approach was developed to record both positive ECL (PECL) and shadow label-free ECL (SECL) images of single cells. This dual approach enables the imaging of cell morphology and can contribute to multimodal ECL imaging and bioassays.
ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Xu Wu, Wenxin Huang, Yajun Zhao, Can Huang
Summary: This article proposes an efficient model predictive torque control (MPTC) algorithm for induction motors (IM) with flexible duty ratio optimization. The proposed strategy restricts the candidate voltage vectors within a specific area to improve drive performance. Experimental results demonstrate that the proposed algorithm effectively improves steady-state performance and provides faster dynamic response and reduced torque ripple during transient processes.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Hung-Chi Chen, Yin-Chun Lan
Summary: This letter discusses the series-capacitor-based boost power factor correction converter, which has voltage doubler and intrinsic current balancing characteristics only when their equal duty ratios are larger than 0.5. To extend the balanced-currents input voltage range, an unequal duty-ratio feedforward control is proposed. The proposed control method is implemented using FPGA chip to evaluate its performance.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Geochemistry & Geophysics
Tiantian Wei, Wei Wang, Yongwei Zhang, Robert Wang
Summary: A novel nonlinear frequency modulation (NLFM) waveform is proposed in this study, which promises enhanced performance and flexibility through optimized waveform design, achieving lower sidelobes while maintaining a certain main lobe width, thus improving the synthetic aperture radar (SAR) system.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
