发布求助
文献互助 智能选刊 最新文献

Electrical Engineering in Japan最新文献

筛选
英文 中文
Development of a method for calculating the transmission-line constants of cables installed in a rectangular tunnel 建立了矩形隧道中电缆传输在线常数的计算方法
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-03-02 DOI: 10.1002/eej.23378
Yohei Tanaka, Rikido Yonezawa, Taku Noda
{"title":"Development of a method for calculating the transmission-line constants of cables installed in a rectangular tunnel","authors":"Yohei Tanaka,&nbsp;Rikido Yonezawa,&nbsp;Taku Noda","doi":"10.1002/eej.23378","DOIUrl":"10.1002/eej.23378","url":null,"abstract":"<p>Accurately calculating the transmission-line constants of underground cables is important for various types of power system simulations such as electromagnetic transient, power flow, and transient stability simulations. The transmission line constants of cables installed in a tunnel must be calculated taking the skin and proximity effects into account, since the cables are spaced closely to each other and also to a wall face of the tunnel. However, the conventional method, which is capable of considering the skin and proximity effects, has been restricted to circular cross-section conductors such as cables and a circular tunnel. Therefore, the method cannot handle a tunnel with a rectangular cross section. In this paper, a method for calculating the transmission-line constants of a conductor system in which both circular and rectangular cross-section conductors present in the same space is proposed. Then, the walls of a rectangular tunnel are represented by eight rectangular conductors, and cables represented by circular conductors are placed inside the eight rectangular conductors. In this paper, the proposed method is verified by experiments using a conductor system in which three circular conductors are arranged in a rectangular conductor. Calculated results obtained by the proposed method agree well with the measured results.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 2","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88251329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2
A proposal of a new gradient driver with a gradational voltage inverter for low power loss 一种新型低功耗梯度变频器的设计方案
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-03-02 DOI: 10.1002/eej.23363
Masayuki Oishi, Ryosuke Kobayashi, Tomokazu Sakashita
{"title":"A proposal of a new gradient driver with a gradational voltage inverter for low power loss","authors":"Masayuki Oishi,&nbsp;Ryosuke Kobayashi,&nbsp;Tomokazu Sakashita","doi":"10.1002/eej.23363","DOIUrl":"10.1002/eej.23363","url":null,"abstract":"<p>This paper proposes a new gradient driver with a gradational voltage inverter for low power loss and downsized filter circuits. Gradient drivers produce direct current with low ripple amplitudes to achieve high image quality and high slew rates to obtain images rapidly. The proposed gradient driver is characterized by low ripple amplitude of the output current from the inverter composed of SiC-MOSFETs and high output voltage from another inverter composed of IGBTs. This paper discusses both the principle of operation and control method of the new gradient driver. Experimental verification is performed on a full-scale system. The results show the advantages of the proposed gradient driver based on loss analysis by calculations.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 2","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86659775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
Design of a contact-force controller including airframe's velocity and acceleration feedback controllers for one-degree-of-freedom propeller-driven systems 一自由度螺旋桨驱动系统中包含机身速度和加速度反馈控制器的接触力控制器的设计
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-03-02 DOI: 10.1002/eej.23379
Yuki Nishii, Daisuke Yashiro, Kazuhiro Yubai, Satoshi Komada
{"title":"Design of a contact-force controller including airframe's velocity and acceleration feedback controllers for one-degree-of-freedom propeller-driven systems","authors":"Yuki Nishii,&nbsp;Daisuke Yashiro,&nbsp;Kazuhiro Yubai,&nbsp;Satoshi Komada","doi":"10.1002/eej.23379","DOIUrl":"10.1002/eej.23379","url":null,"abstract":"<p>Contact-force control of propeller-driven systems achieves aerial tasks that require contact motions with objects. Conventional contact-force controllers for propeller-driven systems utilize a contact-force feedback controller. Although the feedback gain should be high to achieve high target tracking performance, a high gain causes a large overshoot. This paper therefore proposes a novel contact-force controller which utilizes an airframe's velocity and an airframe's acceleration. An estimated acceleration and an estimated velocity of the airframe are fed back to the contact-force controller. A rotor angular velocity is utilized to estimate the acceleration. The validity of the proposed controller is verified through frequency analysis, simulation, and experiment.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 2","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84205806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Effects of nanosecond pulsed electric fields application on cancer cell and combination of anticancer drug 纳秒脉冲电场对肿瘤细胞及抗癌药物联合的影响
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-03-02 DOI: 10.1002/eej.23376
Soichiro Enomoto, Daisuke Konishi, Yoshihiro Uto, Naoyuki Shimomura
{"title":"Effects of nanosecond pulsed electric fields application on cancer cell and combination of anticancer drug","authors":"Soichiro Enomoto,&nbsp;Daisuke Konishi,&nbsp;Yoshihiro Uto,&nbsp;Naoyuki Shimomura","doi":"10.1002/eej.23376","DOIUrl":"10.1002/eej.23376","url":null,"abstract":"<p>With the goal of establishing a new cancer treatment method using nanosecond pulsed electric fields (nsPEFs), we investigated the effect of applying nsPEFs and anticancer drugs (adriamycin, ADM) to cancer cells. The surviving fraction of cancer cells was significantly reduced by nsPEFs application compared to the control. Compared to nsPEFs alone and ADM administration alone, a significant decrease of the surviving fraction was observed in combination of nsPEFs application and ADM administration. In addition, multiplying value of surviving fractions of nsPEFs application and ADM administration was calculated as a pseudo-combination effect. The surviving fractions of the experimental combinational results of nsPEFs and ADM were lower than the pseudo-combination results. Therefore, the synergistic effect of combination of nsPEFs and ADM was confirmed. Furthermore, the surviving fraction of ADM administration after nsPEFs application was significantly lower than that of ADM administration on 24 h before nsPEFs application. ADM action on cells would be effective owing to nanopores were formed by applying nsPEFs. It was confirmed that ADM and nsPEF induced apoptosis of cells from apoptosis and necrosis test using FACS.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 2","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77933853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3
Development of dynamic wireless power transfer system for vehicle logistics robot 车载物流机器人动态无线电力传输系统的研制
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-03-02 DOI: 10.1002/eej.23381
Osamu Shimizu, Kazuyoshi Hanabusa, Kota Arasaki, Daisuke Gunji, Yuto Sakai, Hiromori Ikeda, Fuminori Matsuoka
{"title":"Development of dynamic wireless power transfer system for vehicle logistics robot","authors":"Osamu Shimizu,&nbsp;Kazuyoshi Hanabusa,&nbsp;Kota Arasaki,&nbsp;Daisuke Gunji,&nbsp;Yuto Sakai,&nbsp;Hiromori Ikeda,&nbsp;Fuminori Matsuoka","doi":"10.1002/eej.23381","DOIUrl":"10.1002/eej.23381","url":null,"abstract":"<p>Laborsaving is a major issue in production. In an automotive production line, a yard that is used as a temporary storage for vehicles before shipping. The vehicle-loading robot that operates autonomously has been proposed to automate the alignment of vehicles in the yard instead of human driving. In this study, the dynamic wireless power transfer (DWPT) system that includes the structure of the roadside for the vehicle-loaded robot is proposed. It is proven that the transmitter coil has enough durability for the load of the robot weight using simulation and actual measurement. It is also shown that the reinforcement bars of the road structure cause considerable eddy current loss even with stainless steel. This is similar to loss by coil resistance. This system achieves a 1.8 kW DWPT with an automated coil detection system and a frequency control system, under factory conditions.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 2","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81920569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Parameter determination for reducing ESS capacity in PV power smoothing control using spline function 利用样条函数降低光伏功率平滑控制中ESS容量的参数确定
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-03-01 DOI: 10.1002/eej.23367
Akiko Takahashi, Tatsuya Kajitani, Shigeyuki Funabiki
{"title":"Parameter determination for reducing ESS capacity in PV power smoothing control using spline function","authors":"Akiko Takahashi,&nbsp;Tatsuya Kajitani,&nbsp;Shigeyuki Funabiki","doi":"10.1002/eej.23367","DOIUrl":"10.1002/eej.23367","url":null,"abstract":"<p>This paper comprehensively evaluates the PV power smoothing control method using the spline function. As a result of the verification, it is shown that the ESS capacity can be reduced while maintaining the smoothing effect by PV power smoothing control with energy control and limiting fluctuation rate control. Based on the charging/discharging power of the ESS and the operating conditions of the ESS, the section time that achieves both improvement of the smoothing effect and reduction of the ESS capacity is determined to be 1500 s. Then, the rated capacity of the ESS for a rated power of 1.75MW PV system is 1128 kWh. This is 49.6% of the rated capacity of the ESS, which is required in the PV power smoothing control method with fluctuation rate control. As a result of comparing the proposed method and the moving average method, the proposed method improved the smoothing effect by 49.8% compared to the moving average method.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 2","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89154095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
Waveform conversion and validation of transient magnetic field due to ESD using equivalent circuit of magnetic near‐field probe 利用磁性近场探头等效电路进行ESD瞬态磁场波形转换与验证
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-02-28 DOI: 10.1002/eej.23371
Jianqing Wang, K. Kawamata, S. Ishigami, Takeshi Ishida, O. Fujiwara
{"title":"Waveform conversion and validation of transient magnetic field due to ESD using equivalent circuit of magnetic near‐field probe","authors":"Jianqing Wang, K. Kawamata, S. Ishigami, Takeshi Ishida, O. Fujiwara","doi":"10.1002/eej.23371","DOIUrl":"https://doi.org/10.1002/eej.23371","url":null,"abstract":"With a 6 GHz band high resolution magnetic near‐field probe (XF‐R 3‐1) produced by Langer, the transient magnetic fields due to collision ESDs (electrostatic discharges) between metal balls at a charging voltage of 600 V were measured near the spark point to investigate a dipole radiation mechanism. In this study, as an object of considering the measured magnetic field waveforms, two different equivalent circuits of the magnetic near‐field probe are derived based on the probe response waveform observed by a TDR (time domain reflectometer) with a 10 ps rise‐time pulse and the probe reflection coefficient measured with a 26 GHz network analyzer. Waveform conversion formulae from the probe output voltage to the magnetic field are given. The validity of the conversion methods is verified by comparing the measured conversion waveforms and their frequency spectra in addition to the converted spectra by the Langer field correction curve with the calculated waveforms of the transient magnetic far‐fields from a dipole model consisting of image charge pairs and the Rompe‐Weizel spark resistance formula. The probe conversion formulae presented here are valid within the frequency range of the 6 GHz probe band, however, beyond the band the resonance peaks at multiple frequencies over 8 GHz appear on the spectra, which causes damping oscillations peculiar to the probe with multiple frequencies to the time domain waveform.","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"19 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78114614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Nondistractive extraction of intracellular molecules from yeast using PEF‐assisted autolysis 利用PEF辅助自溶法无干扰提取酵母胞内分子
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-02-22 DOI: 10.1002/eej.23372
Shuji Okamoto, Yoji Murakami, Gen Urabe, S. Katsuki
{"title":"Nondistractive extraction of intracellular molecules from yeast using PEF‐assisted autolysis","authors":"Shuji Okamoto, Yoji Murakami, Gen Urabe, S. Katsuki","doi":"10.1002/eej.23372","DOIUrl":"https://doi.org/10.1002/eej.23372","url":null,"abstract":"This paper discusses the possibility of nondestructive extraction of intracellular proteins of yeast (Saccharomyces cerevisiae) by means of pulsed electric fields (PEFs) combined with autolysis. First, the effects of PEFs (20 kV/cm, 600 ns) on yeast and the subsequent cell wall collapse phenomenon were studied by morphological observation of fluorescence staining. Morphological observation shows that the PEFs increase the permeability of the cell membrane and also disrupt the intracellular vacuoles, whereas the cell wall morphology remains unchanged. However, the cell wall was collapse during the postPEF incubation. Next, the amount of extracted protein was evaluated by using the BCA assay. The amount of extracted protein in the PEF treated suspension was only a little, whereas the additional incubation promotes the extraction. Lastly, the size of the extracted proteins was investigated by using both Native‐PAGE and SDS‐PAGE. The PEF‐treated and incubated suspension contains the large protein over 250 kDa.","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"13 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74156052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Improvement of low‐speed sensorless control with multi‐layer neural network 多层神经网络对低速无传感器控制的改进
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-02-22 DOI: 10.1002/eej.23369
Sari Maekawa, A. Tanaka
{"title":"Improvement of low‐speed sensorless control with multi‐layer neural network","authors":"Sari Maekawa, A. Tanaka","doi":"10.1002/eej.23369","DOIUrl":"https://doi.org/10.1002/eej.23369","url":null,"abstract":"In recent years, there has been an increasing demand for position sensorless control in Permanent Magnet Synchronous Motor (PMSM) drives, and various methods have been studied. Switching noise is a problem in the low‐speed sensorless control method that uses the current slope during PWM. Furthermore, another problem is that the inductance does not appear in a sinusoidal distribution owing to magnetic saturation. In this paper, we improve the sensorless control method that estimates the position from the current slope during PWM, which is greatly affected by switching. Additionally, we build a multi‐layer neural network (NN) that directly estimates the position signals by learning a large amount of current data, and verify the driving results in the low‐speed range when the learned NN is incorporated into real‐time control.","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"60 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76205466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Fabrication of heater‐integrated MEMS tactile sensor for evaluation of warm and cold sensation by touching glass 加热集成MEMS触觉传感器的制造，用于评估触摸玻璃的冷热感觉
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-02-21 DOI: 10.1002/eej.23370
Naotaka Onda, Takaaki Kozuka, Takashi Abe, M. Isshiki, Satoru Tomeno, Masayuki Sohgawa
{"title":"Fabrication of heater‐integrated MEMS tactile sensor for evaluation of warm and cold sensation by touching glass","authors":"Naotaka Onda, Takaaki Kozuka, Takashi Abe, M. Isshiki, Satoru Tomeno, Masayuki Sohgawa","doi":"10.1002/eej.23370","DOIUrl":"https://doi.org/10.1002/eej.23370","url":null,"abstract":"The paper addresses fabrication and characterization of a MEMS tactile sensor sensitive to force and temperature with an on‐chip heater and a contact part of thermally conductive elastomer. The temperature response of this sensor due to heat transfer when it was in contact with the glass plate was measured. As a result, it is demonstrated that fabricated sensor can detect thermally difference due to differences in the surface treatment of the glass.","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"100 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73654871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信