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A Laboratory of Electromagnetic Compatibility for Power System
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作者 张文亮 邬雄 郎维川 《Electricity》 2002年第2期43-46,共4页
The first laboratory of electromagnetic compatibility in Chinais possessed of vivid characteristics in respect of design and configurationof testing equipment. It has successively completed some testing projectsand wi... The first laboratory of electromagnetic compatibility in Chinais possessed of vivid characteristics in respect of design and configurationof testing equipment. It has successively completed some testing projectsand will unfold a more extensive range of measurement and test works inthe days to come.[ 展开更多
关键词 power system electromagnetic compatibility (EMC) electromagnetic interference (EMI) LABORATORY
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Electromagnetic Compatibility Technology of Electric Vehicles and Its Development Trend
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作者 文宝忠 李波 周荣 《China Standardization》 2012年第2期58-61,共4页
The electromagnetic compatibility of electric vehicles is not only the important technology issue in researches,development and industrialization of electric vehicles,but also the key research area of ISO.In this pape... The electromagnetic compatibility of electric vehicles is not only the important technology issue in researches,development and industrialization of electric vehicles,but also the key research area of ISO.In this paper,both national and international standards of electromagnetic compatibility of electric vehicles are analyzed;it is also suggested that our standards of electromagnetic compatibility of electric vehicles be improved from several aspects such as testing items,test procedures,limit value,etc.The electromagnetic environment of electric vehicles is analyzed in terms of interfering sources,providing the solutions to electromagnetic compatibility and measures of reducing electromagnetic interference.Advanced equipments introduced into Chinese electromagnetic compatibility testing laboratories accelerate the pace of the researches on related technologies and standards;China will develop the standards system which covers from the complete electric vehicle to the key components,promote the technology improvement and industrialization work of Chinese electric vehicles,transform the latest achievements and advanced experiences of Chinese electric vehicles industry to the related standards and contribute the development of international standards. 展开更多
关键词 electric vehicles electromagnetic compatibility standards system TREND
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Annual Work Report of Electrical Engineering and Electromagnetic Compatibility Group in 2019
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作者 Zhou Zhongzu Feng Anhui +3 位作者 Zhao Jiang Sun Peng Zhang Yongbo Qi Zhiting 《IMP & HIRFL Annual Report》 2019年第1期284-285,共2页
The group of Electrical Engineering and Electromagnetic Compatibility undertakes the design of AC power distribution system along with electromagnetic compatibility and integrated wiring in Heavy-ion Accelerator Facil... The group of Electrical Engineering and Electromagnetic Compatibility undertakes the design of AC power distribution system along with electromagnetic compatibility and integrated wiring in Heavy-ion Accelerator Facilities. 展开更多
关键词 electricAL electromagnetic compatibility
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Direct Ink Writing of Highly Conductive MXene Frames for Tunable Electromagnetic Interference Shielding and Electromagnetic Wave-Induced Thermochromism 被引量:14
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作者 Xinyu Wu Tingxiang Tu +6 位作者 Yang Dai Pingping Tang Yu Zhang Zhiming Deng Lulu Li Hao-Bin Zhang Zhong-Zhen Yu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第10期14-28,共15页
The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference(EMI)shielding materials to assure the normal operation of their closely assembled compo... The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference(EMI)shielding materials to assure the normal operation of their closely assembled components.However,the most current techniques are not adequate for the fabrication of shielding materials with programmable structure and controllable shielding efficiency.Herein,we demonstrate the direct ink writing of robust and highly conductive Ti3C2Tx MXene frames with customizable structures by using MXene/AlOOH inks for tunable EMI shielding and electromagnetic wave-induced thermochromism applications.The as-printed frames are reinforced by immersing in AlCl_(3)/HCl solution to remove the electrically insulating AlOOH nanoparticles,as well as cross-link the MXene sheets and fuse the filament interfaces with aluminum ions.After freeze-drying,the resultant robust and porous MXene frames exhibit tunable EMI shielding efficiencies in the range of 25-80 dB with the highest electrical conductivity of 5323 S m−1.Furthermore,an electromagnetic wave-induced thermochromic MXene pattern is assembled by coating and curing with thermochromic polydimethylsiloxane on a printed MXene pattern,and its color can be changed from blue to red under the high-intensity electromagnetic irradiation.This work demonstrates a direct ink printing of customizable EMI frames and patterns for tuning EMI shielding efficiency and visualizing electromagnetic waves. 展开更多
关键词 MXene electromagnetic interference shielding Direct ink writing electrical conductivity THERMOCHROMISM
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Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks 被引量:5
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作者 Bai Xue Yi Li +4 位作者 Ziling Cheng Shengdu Yang Lan Xie Shuhao Qin Qiang Zheng 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第1期262-277,共16页
Some precision electronics such as signal transmitters need to not only emit effective signal but also be protected from the external electromagnetic(EM)waves.Thus,directional electromagnetic interference(EMI)shieldin... Some precision electronics such as signal transmitters need to not only emit effective signal but also be protected from the external electromagnetic(EM)waves.Thus,directional electromagnetic interference(EMI)shielding materials(i.e.,when the EM wave is incident from different sides of the sample,the EMI shielding effectiveness(SE)is rather different)are strongly required;unfortunately,no comprehensive literature report is available on this research field.Herein,Nicoated melamine foams(Ni@MF)were obtained by a facile electroless plating process,and multiwalled carbon nanotube(CNT)papers were prepared via a simple vacuum-assisted self-assembly approach.Then,step-wise asymmetric poly(butylene adipate-co-terephthalate)(PBAT)composites consisting of loose Ni@MF layer and compact CNT layer were successfully fabricated via a facile solution encapsulation approach.The step-wise asymmetric structures and electrical conductivity endow the Ni@MF/CNT/PBAT composites with unprecedented directional EMI shielding performances.When the EM wave is incident from Ni@MF layer or CNT layer,Ni@MF-5/CNT-75/PBAT exhibits the total EMI SE(SET)of 38.3 and 29.5 dB,respectively,which illustrates theΔSET of 8.8 dB.This work opens a new research window for directional EMI shielding composites with step-wise asymmetric structures,which has promising applications in portable electronics and next-generation communication technologies. 展开更多
关键词 Solution encapsulation Step-wise asymmetry Directional electromagnetic interference shielding electrical conductivity Vacuum-assisted self-assembly
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Study on Electromagnetic Transient Condition of EMU Passing by Phase-separation with Electric Load in High-speed Railway 被引量:1
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作者 Xiaoxu Guo Jianzhong Wei +2 位作者 Long Xu Shibin Gao Zhengqing Han 《Energy and Power Engineering》 2013年第4期1061-1068,共8页
Aiming at the complex electromagnetic transient process of EMU passing by phase-separation with electric load in high-speed railway, mechanism of overvoltage caused by switching off, overvoltage caused by switching on... Aiming at the complex electromagnetic transient process of EMU passing by phase-separation with electric load in high-speed railway, mechanism of overvoltage caused by switching off, overvoltage caused by switching on and impact current is analyzed systematically in this article. π-type equivalent circuit of feeding section is put forward in the analysis of overvoltage mechanism. Overvoltage and overcurrent model of passing by phase-separation with electric load are also built. Correctness of mechanism was validated by simulation. In addition, the methods to solve the influence on substations, transformers and protection devices in this process are put forward, which provides a new idea on passing by phase-separation with electric load technology. 展开更多
关键词 PASSING by PHASE-SEPARATION with electric Load electromagnetic Transient Process OVERVOLTAGE Impact Current Traction power Supply system
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Polypyrrole-Coated Zein/Epoxy Ultrafine Fiber Mats for Electromagnetic Interference Shielding 被引量:1
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作者 丁润龙 戚瑞瑞 +3 位作者 刘飞 刘万双 张礼颖 蒋秋冉 《Journal of Donghua University(English Edition)》 CAS 2023年第4期351-356,共6页
To reduce the environmental pollution and meet the needs for wearable electronic devices, new requirements for electromagnetic interference(EMI) shielding materials include flexibility, biodegradability, and biocompat... To reduce the environmental pollution and meet the needs for wearable electronic devices, new requirements for electromagnetic interference(EMI) shielding materials include flexibility, biodegradability, and biocompatibility. Herein, we reported a polypyrrole-coated zein/epoxy(PPy/ZE) ultrafine fiber mat which was inherently biodegradable and skin-friendly. In addition, it could maintain its ultrafine fibrous structure after coating, which could provide the mat with mechanical compliance, high porosity, and a large specific area for high EMI shielding. With the assistance of the epoxide cross-linking, the breaking stresses of the PPy/ZE fiber mats could achieve 3.3 MPa and 1.4 MPa and the strains were 40.1% and 83.0% in dry and wet states, respectively, which met the needs of various wearable electronic devices. Along with the extension in the PPy treatment duration, more PPy was loaded on the fiber surfaces, which formed more integrated and conductive paths to generate increasing conductivities up to 401.76 S·m^(-1). Moreover, the EMI shielding performance was raised to 26.84 dB. The biobased mats provide a green and efficient choice for EMI shielding materials, which may be a promising strategy to address EMI problems in multiple fields. 展开更多
关键词 polypyrrole(PPy) ZEIN ultrafine fiber mat electromagnetic interference(EMI)shielding electrical conductivity
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Progress of Expert Systems in Electromagnetic Engineering 被引量:1
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作者 赖生建 王秉中 《Journal of Electronic Science and Technology of China》 2005年第4期328-333,共6页
It is urgent to solve various problems in electromagnetic (EM) engineering under the increasingly complicated environment. Some expert systems (ES) come into being just to keep up with the demand for solving these... It is urgent to solve various problems in electromagnetic (EM) engineering under the increasingly complicated environment. Some expert systems (ES) come into being just to keep up with the demand for solving these problems. Combined with the analysis of development orES technology and the development trend of EM engineering software in recent years, the application orES technology in EM engineering is discussed, and especially the progress of complete ES in electromagnetic compatible (EMC) is introduced. 展开更多
关键词 electromagnetic (EM) engineering expert system KNOWLEDGE-BASE engineering software electromagnetic compatible (EMC) electromagnetic interfere(EMI)
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Effects of medically generated electromagnetic interference from medical devices on cardiac implantable electronic devices: A review
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作者 Walker Barmore Himax Patel +2 位作者 Cassandra Voong Caroline Tarallo Joe B Calkins Jr 《World Journal of Cardiology》 2022年第8期446-453,共8页
As cardiac implantable electronic devices(CIED)become more prevalent,it is important to acknowledge potential electromagnetic interference(EMI)from other sources,such as internal and external electronic devices and pr... As cardiac implantable electronic devices(CIED)become more prevalent,it is important to acknowledge potential electromagnetic interference(EMI)from other sources,such as internal and external electronic devices and procedures and its effect on these devices.EMI from other sources can potentially inhibit pacing and trigger shocks in permanent pacemakers(PPM)and implantable cardioverter defibrillators(ICD),respectively.This review analyzes potential EMI amongst CIED and left ventricular assist device,deep brain stimulators,spinal cord stimulators,transcutaneous electrical nerve stimulators,and throughout an array of procedures,such as endoscopy,bronchoscopy,and procedures involving electrocautery.Although there is evidence to support EMI from internal and external devices and during procedures,there is a lack of large multicenter studies,and,as a result,current management guidelines are based primarily on expert opinion and anecdotal experience.We aim to provide a general overview of PPM/ICD function,review documented EMI effect on these devices,and acknowledge current management of CIED interference. 展开更多
关键词 electromagnetic interference Pacemaker Implantable cardioverter defibrillator Permanent pacemakers Cardiac implantable electronic devices Left ventricular assist device Endoscopy BRONCHOSCOPY ELECTROCAUTERY Capsule endoscopy Transcutaneous electrical nerve stimulators unit Spinal cord stimulator
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Study of Electromagnetic Compatibility in Hospital Environments
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作者 Oscar Gutierrez Miguel Angel Navarro +3 位作者 Francisco Saez de Adana Adolfo Escobar Maria E.Moncada Claudio Marcelo Munoz 《Journal of Electromagnetic Analysis and Applications》 2014年第7期141-155,共15页
This paper presents a study on the effects of radiation from electronic equipment in hospitals. This study was performed in Argentinean, Colombian and Spanish hospitals. The work consists of two parts: a survey to det... This paper presents a study on the effects of radiation from electronic equipment in hospitals. This study was performed in Argentinean, Colombian and Spanish hospitals. The work consists of two parts: a survey to determine the hospital personnel’s knowledge of the problem and a technical part consisting of a measurements campaign to determine the levels of radiated electrical and magnetic fields in several hospitals due to the presence of electromagnetic interferences, such as the use of mobile phones. The study of this problem has been of special interest in countries such as the USA and Canada, and this paper attempts to convey the necessity of creating regulations that can be applied to the hospitals of the countries analyzed. More than fifty hospitals were studied in these three countries, considering the following aspects: the hospital personnel’s awareness of the problem, whether the hospitals have performed previous studies of this type, the appearance of problems in medical equipment due to this interference, the origin of the interference, and the failures that have appeared in computers due to electromagnetic interference. The results show that, most hospitals have a lack of knowledge regarding this issue and that field levels above those allowed by international regulations are present. Therefore, a regulation must be established to avoid the problem. 展开更多
关键词 electromagnetic compatibility Radiated Emissions Magnetic Field Measurements electric Field Measurements
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Study of Electromagnetism Compatibility of Single-chip Switching Power Supply and Suppression Technique 被引量:2
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作者 HE Hong JIN Shijiu +3 位作者 ZHANG Dajian MENG Hui ZHU Xianwei TANG Lu 《现代电子技术》 2007年第2期159-161,共3页
As for the Domino effect dv/dt and electromagnetic interference during the rapid switching course of single-chip switching power supply,this article firstly analyzes electromagnetic interference source,and then diagno... As for the Domino effect dv/dt and electromagnetic interference during the rapid switching course of single-chip switching power supply,this article firstly analyzes electromagnetic interference source,and then diagnoses the essential interaction relationship between interference and switching activity based on the timely and area measured waveform,analyzes and studies the production mechanism and coupling path of interference mode,and sets up circuit model according to the features of transverse mode interference and common mode interference.Put forward different suppression methods finally. 展开更多
关键词 switching power electromagnetism compatibility common mode interference transverse mode interference coupling path
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Effect of Structure Parameters on Power and Magnetic Field in Electromagnetic Soft-Contact Continuous Casting System 被引量:5
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作者 DENG An-yuan WANG En-gang HE Ji-cheng 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2008年第1期19-24,共6页
To design a power source system and mold for electromagnetic soft-contact continuous casting process and to theoretically estimate the heat losses from the charges and the system power, the effect of structure paramet... To design a power source system and mold for electromagnetic soft-contact continuous casting process and to theoretically estimate the heat losses from the charges and the system power, the effect of structure parameters on system power and magnetic flux density distribution was calculated using finite element method. The results show that as for electromagnetic soft-contact continuous casting system with partial-segment type mold, the power consumption is much more than that with a full-segment type mold; about 62% of electric power is dissipated in the mold, and the effective acting range of magnetic field is relatively narrow. Optimizing mold structure is a crucial measure of remarkably reducing mold power consumption and saving electric energy. Increasing slit number, width, and length can remarkably increase the magnetic flux density in the mold and can reduce the electric energy consumption. Among structure parameters, slit number and slit width are relatively more effective to reduce energy consumption. For a round billet electromagnetic continuous casting system with diameter of 178 ram, the reasonable slit number, width, and length are about 24--32, 0. 5--1.0 mm, and 160 mm, respectively. 展开更多
关键词 continuous casting soft-contact mold electromagnetic field electric power structure parameter
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Conducted EMI Suppression in Plasma Cutting Power Supply 被引量:1
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作者 Abdolreza Esmaeli 孙力 赵克 《Plasma Science and Technology》 SCIE EI CAS CSCD 2005年第6期3170-3173,共4页
A systematic approach to the design of the conducted electromagnetic interference (EMI) filter of high-density plasma cutting power supply has been developed. Converter components have been accurately modeled, with ... A systematic approach to the design of the conducted electromagnetic interference (EMI) filter of high-density plasma cutting power supply has been developed. Converter components have been accurately modeled, with parasitic elements extracted to reveal their impacts on the EMI noises. Circuit simulations have been used to analyze and minimize the EMI noises. Conducted EMI noise measurement and filter design of this power supply have been achieved which successfully satisfy the FCC class B limits in the frequency range from 150 kHz to 30 MHz. The analyses and experimental results show that the designed filter guarantees that the required attenuation will be achieved. 展开更多
关键词 conducted electromagnetic interference (EMI) plasma cutting power supply electromagnetic compatibility (EMC) saber designer filter design
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Formation and characterization of self-lubricated carbide layer on AA6082 Al-Mg-Si aluminum alloy by electrical discharge alloying process 被引量:1
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作者 Wang-Chih CHEN Hung-Mao LIN Jun-Yen UAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第12期3205-3218,共14页
The surface modification on the AA6082 Al?Mg?Si aging-hardenable aluminum alloy was investigated by electricaldischarge alloying (EDA) process. Kerosene, used as a dielectric fluid, was pyrolytically decomposed into c... The surface modification on the AA6082 Al?Mg?Si aging-hardenable aluminum alloy was investigated by electricaldischarge alloying (EDA) process. Kerosene, used as a dielectric fluid, was pyrolytically decomposed into carbon for the formationof a self-lubricated carbide layer on the aluminum alloy surface during EDA process. Transmission electron microscopy (TEM)image found that the self-lubricated carbide layer was a multi-phase material with carbides and graphite. As a result, theEDA-modified aluminum alloy had a negligible wear rate of ~2?10?4 mg/m (c. f. ~1.1?10?2 mg/m for aluminum alloy substrate).Notably, a new characteristic was found that the EDA-processed carbide layer was a soft magnet, which improved theelectromagnetic interference (EMI) shielding performance of the alloy. 展开更多
关键词 Al-Mg-Si aluminum alloy surface modification electrical discharge alloying SELF-LUBRICATING pyrolytic carbon electromagnetic interference shielding
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Electromagnetic interference modeling and elimination for a solar/hydrogen hybrid powered small-scale UAV 被引量:1
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作者 Jiahao GE Li LIU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第10期293-308,共16页
The trajectory related and Direct Current(DC)Electromagnetic Interference(EMI)of lithium battery,fuel cell and photovoltaic modules has a great influence on the small-scale Unmanned Aerial Vehicle(UAV)airborne magneto... The trajectory related and Direct Current(DC)Electromagnetic Interference(EMI)of lithium battery,fuel cell and photovoltaic modules has a great influence on the small-scale Unmanned Aerial Vehicle(UAV)airborne magnetometer and is hard to be shielded,calibrated or filtered.Besides,the mechanisms underlying the DC EMI have been rarely investigated yet.To cope with this problem,this paper systematically studies the EMI models,and proposes an online 3-layer EMI reduction scheme.First,EMI coupled with UAV motion model and hybrid power system is established.Second,the mechanism EMI models of hybrid power system are established and verified based on the proposed concept“equivalent current”.Third,an online 3-layer EMI reduction scheme is proposed,including battery layer,trajectory planning layer and energy management layer.In the first main layer,EMI self-cancellation is realized by rotating battery inclinations and symmetrical circuits.In response to errors,the trajectory planning layer reduces the EMI intensity by optimizing an optimal trajectory,while the energy management layer prioritizes power allocation to power sources that can produce small and stable EMI.Simulation results of climb,level flight and descent illustrate the efficaciousness and applicability of the proposed online 3-layer EMI reduction scheme. 展开更多
关键词 electromagnetic interference EMI reduction Energy management Hybrid powered UAV Mechanism modeling Trajectory planning
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Neuromuscular electrical stimulation for a dysphagic stroke patient with cardiac pacemaker using magnet mode change: A case report
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作者 Myeongkyu Kim Jin-Kyu Park +1 位作者 Ji Young Lee Mi Jung Kim 《World Journal of Clinical Cases》 SCIE 2021年第19期5313-5318,共6页
BACKGROUND Electromagnetic interference(EMI),means disturbance to the operation of implanted electrical devices caused by external sources.If cardiac pacemaker is implanted into the body,the risk of EMI should be cons... BACKGROUND Electromagnetic interference(EMI),means disturbance to the operation of implanted electrical devices caused by external sources.If cardiac pacemaker is implanted into the body,the risk of EMI should be considered when performing neuromuscular electrical stimulation(NMES).So far,no case has been reported that clinical magnets are used to safely manage the EMI risk of patients with cardiac pacemaker in NMES.CASE SUMMARY A 72-year-old male with swallowing disorder due to pure motor lacunar syndrome was transferred to rehabilitation department six days after the symptom onset.EMI risk needed be considered when implementing NMES on pharyngeal muscles,since cardiac pacemaker was implanted on his left chest due to the sick sinus syndrome.In the first NMES,the function of the pacemaker was directly monitored using telemetric instruments.From the second day,by a simple method of placing a magnet on the pacemaker,we chose to move the pacemaker into a mode that the device was not influenced by external stimulus.This magnet method has been used repeatedly for a year for the safe NMES treatment.We could remove Levin tube four months after the initial symptom and dysphagia related symptoms had not been noted during two-year follow-up period.CONCLUSION This report is the first case of dysphagia rehabilitation that EMI risk was handled using mode change of pacemaker with magnet.This method is unfamiliar to doctors,but safe and easy approach.This paper could be guidance for clinicians who need to treat patients with EMI risk. 展开更多
关键词 Dysphagia rehabilitation electromagnetic interference Neuromuscular electrical stimulation PACEMAKER MAGNET Case report
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Impact of EAS Systems on Implanted Cardiac Pacemakers and Defibrillators
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作者 Norbert Leitgeb Florian Niedermayr Gerhard Loos 《Journal of Electromagnetic Analysis and Applications》 2013年第2期67-73,共7页
To investigate electromagnetic interference (EMI) of electromagnetic fields (EMF) from electronic article surveillance (EAS) systems with electronic implants numerical anatomical models of pacemaker patients were gene... To investigate electromagnetic interference (EMI) of electromagnetic fields (EMF) from electronic article surveillance (EAS) systems with electronic implants numerical anatomical models of pacemaker patients were generated accounting for different implantation sites (left pectoral, right pectoral and abdominal) and body size. Induced interference voltages were calculated with a software package applying the Finite Integration Technique and analysed in dependence on frequency. Results were referred to reported maximum magnetic fields levels measured at EAS systems in the ELF, IF and RF range. With reference to electromagnetic immunity requirements of safety standards of implanted cardiac pacemakers and defibrillators, the numerical analysis showed that the relevance of interference depends on the applied EMF frequency. At EAS systems operating in the RF range, EMI and consequential inadequate pacing is rare but cannot be ruled out. The probability of such events increases at EAS systems in the IF range and even more in the ELF range. Since interference is encountered already at yet existing systems, the situation would be worse if future systems would further increase their emissions by making use of the elevated reference levels recommended in updated exposure guidelines. 展开更多
关键词 RFID interference electromagnetic FIELDS electromagnetic compatibility Safety
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Study of Denoising in the Electricity Anti-Stealing Detection Based on VMD-WTD Combination
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作者 Huakun Que Guolong Lin +5 位作者 Wenchong Guo Xiaofeng Feng Zetao Jiang Yunfei Cao Jinmin Fan Zhixian Ni 《Energy Engineering》 EI 2022年第4期1453-1466,共14页
In order to solve the failure of electricity anti-stealing detection device triggered by the noise mixed in high-frequency electricity stealing signals,a denoising method based on variational mode decomposition(VMD)an... In order to solve the failure of electricity anti-stealing detection device triggered by the noise mixed in high-frequency electricity stealing signals,a denoising method based on variational mode decomposition(VMD)and wavelet threshold denoising(WTD)was applied to extract the effective high-frequency electricity stealing signals.First,the signal polluted by noise was pre-decomposed using the VMD algorithm,the instantaneous frequency means of each pre-decomposed components was analyzed,so as to determine the optimal K value.The optimal K value was used to decompose the polluted signal into K intrinsic mode components,and the sensitive mode components were determined through the cross-correlation function.Next,each sensitive mode was reconstructed.Finally,the reconstructed signal denoised using the wavelet threshold to obtain the denoised signal.The simulation analysis and experimental results show that the proposed method is superior to the traditional VMD method,FFT method and EMD method,as it can effectively eliminate the noise and enhance the reliability of high-frequency electricity stealing signal detection. 展开更多
关键词 electricity stealing electromagnetic interference variable mode wavelet threshold instantaneous frequency mean
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虑及互耦效应的线缆辐射EMI建模 被引量:1
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作者 姬军鹏 张宁 +2 位作者 林珊 李臻 骆鹏 《电源学报》 CSCD 北大核心 2024年第5期52-59,共8页
并行布线结构的开关电源线缆是开关电源辐射电磁干扰EMI(electromagnetic interference)的重要干扰源。针对并行线缆间辐射场互耦效应机理不明晰使得辐射电磁干扰预测不准确的问题,提出1种虑及线缆间互耦效应开关电源线缆的辐射电磁干... 并行布线结构的开关电源线缆是开关电源辐射电磁干扰EMI(electromagnetic interference)的重要干扰源。针对并行线缆间辐射场互耦效应机理不明晰使得辐射电磁干扰预测不准确的问题,提出1种虑及线缆间互耦效应开关电源线缆的辐射电磁干扰模型。通过对描述线缆互耦效应的互阻抗建模,得到描述开关电源线缆辐射特性的辐射EMI输入阻抗模型,进而得到虑及互耦效应开关电源线缆的辐射EMI模型;搭建辐射EMI测试实验平台进行测试。实验结果表明,所提虑及互耦效应的辐射电磁干扰模型能够更为准确地预测开关电源线缆的辐射电磁干扰。 展开更多
关键词 辐射电磁干扰 开关电源 线缆 互耦
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永磁同步电磁原理的冲击式按压发电机研究 被引量:1
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作者 赵兴强 殷旭鹏 +2 位作者 张译文 许珂钒 蔡骏 《电子测量与仪器学报》 CSCD 北大核心 2024年第6期1-7,共7页
按键开关用的发电机可将按键动作转为电能,为无线按键开关提供电能,在绿色智能家居中有重要的应用价值。本文提出了一种利用电磁原理的冲击式发电机,设计了一种双稳态转换的结构,在两个稳态转换的过程中,线圈中磁力线反向突变,产生电动... 按键开关用的发电机可将按键动作转为电能,为无线按键开关提供电能,在绿色智能家居中有重要的应用价值。本文提出了一种利用电磁原理的冲击式发电机,设计了一种双稳态转换的结构,在两个稳态转换的过程中,线圈中磁力线反向突变,产生电动势脉冲。采用有限元软件对双稳态结构的磁场分布情况进行了分析,对线圈和铁芯尺寸进行了优化设计,结果表明两个稳定状态的线圈中磁力线方向相反,感应电动势基本上随尺寸线性增加。加工组装了发电机样机,通过实验研究发现,按压一次,发电机输出电压可以达到30 V,产生电能达到1469μJ。利用电磁转换原理将按压动作转化为电能,其紧凑的设计、小巧的体积和高输出功率使其具有显著的优势,有望为无线传感网络节点和无线开关提供充足的能源,实现绿色自给运行。 展开更多
关键词 冲击 电磁式发电机 自发电技术 双稳态 仿真 开关
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