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International Conference on Electrical Machines and Systems (ICEMS)

作者： Tong Chang Shuanghong Wang Zixin Li The State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (数字)9784886864406

ISBN: (纸本)9798350379105

This paper proposes a control strategy based on fuzzy PID control of Switched Reluctance Motor Generator (SRMG) in response to the voltage fluctuation issues caused by load variations in switched reluctance motor system. This strategy is constructed based on the fundamental principles of closed-loop control and fuzzy control theory, incorporating a parameter-adaptive fuzzy PID controller and system model. Initially, a switched reluctance motor system was constructed to obtain voltage fluctuation data. Subsequently, aiming for voltage stabilization, a control algorithm for SRMG under constant speed mode was designed using the fuzzy PID controller, adopting a dual closed-loop control strategy for speed and current. Finally, compared with conventional PID control, the fuzzy PID controller was shown to effectively improve response speed, reduce voltage overshoot, and decrease voltage fluctuation time, demonstrating superior voltage stabilization performance.

关键词： Fuzzy control PI control Voltage fluctuations Fluctuations Uncertainty Switched reluctance motors Generators Mathematical models PD control Voltage control

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Coupling Analysis of Transient electromagnetic Field and Temperature Field in electromagnetic Launch Rail 1

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16th Annual Conference of China Electrotechnical Society, ACCES 2021

作者： Ge, Yifan Qin, Shihong Chen, Lixue Wuhan Institute of Technology Wuhan430200 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

ISBN: (数字)9789811918704

ISBN: (纸本)9789811918698

In the launching process of railgun, the performance degradation caused by local overheating will seriously affect the life of electromagnetic launch rail and launching efficiency. In this paper, a two-dimensional dynamic finite element model of railgun is established to analyze the distribution of rail current and temperature under different driving current and continuous firing frequency. The results show that during the launching process, the current is concentrated on the inner edge of the rail, and the penetration depth is about 1–2 mm. The highest temperature of the rail appears near the end of the current rising edge, and the temperature near the gun tail is higher. Under the case of continuous emission, the change of material properties caused by temperature rise has a great influence on the results. In this paper, the electromagnetic thermal coupling calculation method is used, which can provide a reference for the optimal design of the rail. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Rail guns

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Research on the Scheme and Experiment of Quantum-Voltage-Based Verification Device for the Transformer Calibrator 16th

Research on the Scheme and Experiment of Quantum-Voltage-Bas...

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16th Annual Conference of China Electrotechnical Society, ACCES 2021

作者： Wu, Ruoyu Hu, Haoliang Li, Dong Nie, Qi Huang, Junchang Li, Xiaofei State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China China Electric Power Research Institute Wuhan China

ISBN: (纸本)9789811915314

In order to improve the sampling accuracy of the verification device for the transformer calibrator, a novel verification device scheme based on AC quantum voltage is proposed. The AC quantum voltage is used as the reference of the measured sine signal, and their difference signal is sampled by a multimeter with a small range. After that, a FPGA program reconstructs the sine sampling value based on the difference signal and the known AC quantum voltage to acquire high accuracy sine signal sampling. Limited by experimental conditions, the precision AC voltage reference standard 7410 is used to simulate the AC quantum voltage source output, and the simulation experiment is performed. The experimental results show that the accuracy of the verification device can reach 0.05%. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Signal sampling

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Research and Test of the Error Self-monitoring Merging Unit 16th

Research and Test of the Error Self-monitoring Merging Unit

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16th Annual Conference of China Electrotechnical Society, ACCES 2021

作者： Wang, Chengnan Hu, Haoliang Li, Dong Huang, Junchang Li, Xiaofei State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China China Electric Power Research Institute Wuhan China

ISBN: (纸本)9789811915314

In the digital electric energy metering system, the Merging Unit is responsible for converting analog signals into digital messages, and its analog-to-digital conversion precision directly affects the accuracy of the entire digital electric energy measurement. At present, the accuracy of the Merging Unit is usually checked by the means of regular power outage maintenance. This method has a large workload, a long verification time, and a high verification cost. Therefore, an error self-monitoring Merging Unit scheme based on ADI’s mSure technology is proposed. With the error self-monitoring chip as the core, the corresponding hardware architecture is designed to realize the online error monitoring of the Merging Unit. A sampling processing module is developed based on FPGA to realize the digital message sending function. The Merging Unit calibrator is used to test the measurement accuracy. The experimental results show that this Merging Unit meets the accuracy requirement of class 0.2. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Errors

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A Fast Analytical Dose Calculation Approach Based on RAMDIM in MR-Guided Proton Therapy

A Fast Analytical Dose Calculation Approach Based on RAMDIM ...

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Electronic Information engineering and Computer technology (EIECT), International Conference on

作者： Songbin Chen Ping Tan Haimin Xiong Zhihong Qian Dan Tang State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (数字)9798331528850

ISBN: (纸本)9798331528867

In magnetic resonance-guided proton therapy, protons are deflected in magnetic fields, resulting in distortion of the dose distribution. In dose calculation, Monte Carlo simulation methods are highly accurate but time-consuming. Clinical dose validation requires a fast and accurate method to calculate the dose distribution. In this paper, a fast analytical dose calculation approach is proposed based on Raytracing Algorithm for Magnetic Deflection of Ions in Media. Different energies, different magnetic field strengths and different energy spreads are considered, and the $\gamma$ -pass rates in all cases exceeds 98%.

关键词： Protons Particle beams Accuracy Monte Carlo methods Magnetic resonance imaging Resonance Proton therapy Workstations Trajectory Magnetic fields

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Velocity Disturbance Rejection Control of High-Speed Linear Induction Motor Based on Rolling Prediction Matrix 10

Velocity Disturbance Rejection Control of High-Speed Linear ...

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10th IEEE International Power Electronics and Motion Control Conference, IPEMC 2024 ECCE Asia

作者： Jiang, Xinyu Xu, Fei Li, Zixin Shi, Liming Li, Yaohua Chinese Academy of Sciences Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China Qilu Zhongke Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Jinan250100 China

ISBN: (纸本)9798350351330

Uncertainty disturbance of measured velocity can cause thrust instability, impeding the transonic process of high-speed linear induction motors (HS-LIM). To tackle this issue, a Velocity Disturbance Rejection Control (VDRC) method based on the Rolling Prediction Matrix (RPM) is proposed in this paper. The method employs multi-point speed predictions to identify uncertain disturbances and produce a virtual speed to substitute the affected sensor speed. Simulation results validate that the proposed technique successfully achieves stable transonic acceleration for HS-LIM. © 2024 IEEE.

关键词： Disturbance rejection

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Research on Voltage Coordinated Control Strategy of Multi-port Energy Router 5

Research on Voltage Coordinated Control Strategy of Multi-po...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Zheng, Pingkang Cai, Tao Zhao, Caihong Duan, Qing Huazhong University of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China China Electric Power Research Institute Beijing China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

This paper takes the energy router with DC bus as the research object. Due to the needs of DC bus voltage stability regulation in the energy router, a voltage hierarchical coordinated control method using the droop control principle is proposed. The DC bus voltage of the system is divided into three layers. In different voltage control layers, grid connected unit, energy storage unit and photovoltaic unit are used as voltage sources to control bus voltage stability and power balance. This control method only needs each converter to control its own working state according to the local voltage signal, and does not need the communication line between the central controller and each converter, which can simplify the system structure. A simulation model is built in Matlab / Simulink to verify the proposed voltage hierarchical coordinated control strategy. The simulation results show that the control strategy can realize the stable operation of the energy router, and the operation modes of each converter can switch smoothly, which verifies the effectiveness of the control strategy. © 2022 IEEE.

关键词： Voltage control

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A Major Update and Application of Control System Framework for Experimental Devices Toolkit 3

A Major Update and Application of Control System Framework f...

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3rd IEEE China International Youth Conference on Electrical engineering, CIYCEE 2022

作者： Xie, Xiaohan Zheng, Wei Zhang, Ming Rao, Bo Yang, Yong Jiang, Yixing Wang, Wenshan School of Electrical and Electronic Engineering Huazhong University of Science and Technology International Joint Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China

ISBN: (数字)9781665477321

ISBN: (纸本)9781665477321

CFET(Control system framework for experimental devices toolkit) is a SCADA software tool, which is fully based on web technologies. Compared to mature software tools such as EPICS and tango, CFET greatly enhances the interoperability and Flexibility of control systems. Currently, CFET has completed a major update. For example, events (based on Websocket and MQTT) are proposed for the first time in SCADA software tools. What's more, most SCADA tools are not easy to deploy. CFET innovative use Docker to meet the need for rapid cross-platform deployment, while standardizing the process of controlling system deployment. In this update, CFET also becomes more lightweight than any other SCADA tool, such as building a control system on a Raspberry Pi and accessing it through a browser. In addition, there are many updates of CFET will be introduced in this paper. The paper will also presents a control system for HFRC based on CFET. © 2022 IEEE.

关键词： Computer software

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A Novel Speed Measurement Algorithm Based on Linear Extended State Observer for Segmented Linear Induction Motors with Cooperative Control

A Novel Speed Measurement Algorithm Based on Linear Extended...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Fan Manyi Liming Shi Yaohua Li Fei Xu Zhang Bo Key Laboratory of High Density Electromagnetic Power and Systems (Chinese Academy of Sciences) Institute of Electrical Engineering Chinese Academy of Sciences Beijing China Shandong Key Laboratory of Advanced Electromagnetic Conversion Technology Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu Zhongke Jinan Shandong Province China

ISBN: (数字)9784886864406

ISBN: (纸本)9798350379105

In this paper, a novel speed measurement algorithm based on linear extended state observer (LESO) and thrust cooperative control is proposed to improve the thrust performance of the linear induction motor (LIM). According to the thrust calculation value and linear motion equation of the segmented LIM, a LESO is constructed. Since the thrust fluctuation during the secondary crossing primary segments will affect the precision of the LESO, thrust cooperative control strategy for multiple inverters is applied. Finally, a comparative experiment between the proposed algorithm and the tracking differentiator (TD) were conducted in the LIM platform. Experimental results show that the proposed algorithm has a better real-time performance compared with conventional TD algorithm.

关键词： Induction motors Fluctuations Magnetic field measurement Tracking Motion segmentation Noise Real-time systems Mathematical models Velocity measurement State estimation

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Enhancing performance of fullerene-based organic electrochemical transistors via side-chain engineering

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Nano Research 2025年第2期18卷 905-912页

作者： Wenxin Fang Zijie Li Chengdong Wang Xiaowei Zhao Junyu Li Gang Ye Fengwei Huo Li Qiu Yanxi Zhang Wei Huang Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Yunnan Key Laboratory of Electromagnetic Materials and Devices National Center for International Research on Photoelectric and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091China Sinopec Shanghai Research Institute of Petrochemical Technology Shanghai 201028China Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(NanjingTech)Nanjing 211800China Frontiers Science Center for Flexible Electronics MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi'an 710072China

The performance of organic electrochemical transistors(OECTs)relies on the interaction between organic semiconductors and ***,hydrophilic ethylene glycol(EG)side chains are incorporated into organic semiconductors to improve the channel’s capacity to absorb ***,the EG substituted organic semiconductors tend to swell when immersed in aqueous electrolytes and exhibit microstructural changes induced by dopant *** our research,we introduce an alkyl spacer to create distance between the fullerene and EG *** approach is designed to reduce the negative effects of swelling and balance the ion and electron *** conducted an analysis of OECTs using four fullerene derivatives:no alkyl spacer,butyl,hexyl,and octyl *** OECTs based on fullerene derivatives with butyl and hexyl spacers exhibit enhanced transconductance(g_(m)=11.8 and 19.4 mS)compared to the ones without alkyl *** has also been observed that the butyl and hexyl spacers lead to a more than tenfold increase in volumetric *** increasing the alkyl spacer(octyl group)leads to no transistor *** study uncovers the relationship between alkyl spacers and the performance of OECTs based on fullerene *** will serve as a guideline for designing n-type small molecules for ***,we showcased the potential of utilizing OECTs based on these fullerene derivatives in cation sensing,which is promising for developing sweat sensors.

关键词： organic electrochemical transistors fullerene derivatives ethylene glycol side chains ion and electron conduction

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