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Energy mix for net zero CO2 emissions by 2050 in Japan 到2050年，日本实现净零二氧化碳排放的能源结构
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-20 DOI: 10.1002/eej.23396
Takashi Otsuki, Hideaki Obane, Yasuaki Kawakami, Kei Shimogori, Yuji Mizuno, Soichi Morimoto, Yuhji Matsuo
{"title":"Energy mix for net zero CO2 emissions by 2050 in Japan","authors":"Takashi Otsuki,&nbsp;Hideaki Obane,&nbsp;Yasuaki Kawakami,&nbsp;Kei Shimogori,&nbsp;Yuji Mizuno,&nbsp;Soichi Morimoto,&nbsp;Yuhji Matsuo","doi":"10.1002/eej.23396","DOIUrl":"10.1002/eej.23396","url":null,"abstract":"<p>This study investigated cost-effective energy strategies for realizing net zero CO<sub>2</sub> emissions in Japan by 2050, employing an energy system optimization model with hourly electricity balances. The detailed temporal resolution enables the model to capture the intermittency of variable renewable energy (VRE) and the costs of system integration measures. Siting constraints on VRE, such as prohibiting solar PV and onshore wind developments in forests and offshore wind developments inside fishery rights areas, are incorporated in the model to reflect the environmental protection and social acceptance perspectives. Simulation results imply that a well-balanced power generation mix, combining renewables, nuclear, gas-fired with carbon capture and storage, as well as ammonia-fired, would contribute to curbing mitigation costs. In contrast, a simulation case with very high VRE penetration poses economic challenges. The average shadow price of electricity in 2050 in a 100% renewables case (RE100) is projected to be more than doubled from a reference case which is based on middle-of-the-road assumptions. Marginal CO<sub>2</sub> abatement cost in 2050 increases from 49,200 JPY/tCO<sub>2</sub> in the reference case to 75,300 JPY/tCO<sub>2</sub> in the RE100 case. The economic viability of high VRE penetration is improved by relaxing the siting constraints, although it may raise environmental and social concerns.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 4","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91235863","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
Verifying the calculation approach for radial suspension force based on the airgap flux density for SPM, consequent-pole, and bearingless AC homopolar motors 验证了基于气隙磁通密度计算SPM、结果极和无轴承交流同极电机径向悬浮力的方法
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-11 DOI: 10.1002/eej.23404
Takahiro Noguchi, Hiroya Sugimoto, Yusuke Fujii, Akira Chiba
{"title":"Verifying the calculation approach for radial suspension force based on the airgap flux density for SPM, consequent-pole, and bearingless AC homopolar motors","authors":"Takahiro Noguchi,&nbsp;Hiroya Sugimoto,&nbsp;Yusuke Fujii,&nbsp;Akira Chiba","doi":"10.1002/eej.23404","DOIUrl":"10.1002/eej.23404","url":null,"abstract":"<p>In this paper, a calculation method is proposed for the radial suspension force of a bearingless motor with a surface-mounted permanent magnet (SPM) rotor, a consequent-pole permanent magnet (CPM) rotor, and a homopolar permanent rotor (HPM). The radial suspension forces are calculated mathematically and analytically using the airgap flux density. It was confirmed that the proposed radial force equations are practical to calculate the suspension force based on the airgap flux density. The CPM bearingless motor and bearingless AC HPM have salient pole rotors that interact with the 2-pole Magnetomotive force (MMF) to generate 6- and 10-pole components. As a result, the radial suspension force of the CPM bearingless motor is generated by 8- and 6-pole, and 8- and 10-pole magnetic flux, whereas the bearingless AC HPM produces the radial suspension force by DC and 2-pole components. The shaft torque, the suspension force, and efficiency were also compared for SPM, CPM bearingless motors, and bearingless AC HPM. Consequently, the torque value of the CPM bearingless motor is quite close to SPM bearingless motor. Moreover, the suspension force of the CPM bearingless motor is quite close to bearingless AC HPM.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 4","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87467859","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
Novel dynamic wireless power transfer system using in-tire and in-wheel repeater coil for battery electric vehicles 基于轮内转发器线圈的新型电动汽车动态无线电力传输系统
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-08 DOI: 10.1002/eej.23399
Hayato Sumiya, Eisuke Takahashi, Nobuhisa Yamaguchi, Keisuke Tani, Osamu Shimizu, Sakahisa Nagai, Hiroshi Fujimoto, Daisuke Gunji, Isao Kuwayama
{"title":"Novel dynamic wireless power transfer system using in-tire and in-wheel repeater coil for battery electric vehicles","authors":"Hayato Sumiya,&nbsp;Eisuke Takahashi,&nbsp;Nobuhisa Yamaguchi,&nbsp;Keisuke Tani,&nbsp;Osamu Shimizu,&nbsp;Sakahisa Nagai,&nbsp;Hiroshi Fujimoto,&nbsp;Daisuke Gunji,&nbsp;Isao Kuwayama","doi":"10.1002/eej.23399","DOIUrl":"10.1002/eej.23399","url":null,"abstract":"<p>In order to improve the mileage per charge of battery electric vehicles (BEV), dynamic wireless power transfer systems are being developed. There are some problems such as is the wide gap between coils when mounted under the floor of a vehicle, and the effect of foreign objects between coils on power transmission. In-wheel coils, in which the coils are placed inside the wheel, have been proposed as a solution to these problems. However, they a plastic wheel such as CFRP and cannot reduce the gap between coils. In this paper, we propose a coil configuration in which the coils are placed inside the tire and the wheel. This configuration has the advantage of using a conventional aluminum to reduce the gap between coils. The effectiveness of this method is demonstrated via simulations and experiments.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 4","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75090766","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
A grid frequency control on small scale power system by introduction of variable speed diesel-driven power plant 引入变速柴油机动力装置的小型电力系统电网频率控制
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-08 DOI: 10.1002/eej.23394
Rion Takahashi, Atsushi Umemura, Junji Tamura
{"title":"A grid frequency control on small scale power system by introduction of variable speed diesel-driven power plant","authors":"Rion Takahashi,&nbsp;Atsushi Umemura,&nbsp;Junji Tamura","doi":"10.1002/eej.23394","DOIUrl":"10.1002/eej.23394","url":null,"abstract":"<p>This paper proposes the application of an adjustable speed diesel engine-driven power plant employing a doubly-fed induction generator to an isolated small-scale power system including renewable power sources. This type of power plant can contribute to fast and flexible power balancing regulations under vacillating power supplies such as wind, solar, and other renewable power sources. Installation of a battery system is also considered, which can assist coordinately with the power plant to augment renewable power sources in the isolated power system.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 4","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86501139","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
Reduction of magnetic field by low-order harmonics in magnetic resonant wireless power transfer system using high-frequency switching 高频开关磁谐振无线电力传输系统中低次谐波对磁场的抑制
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-08 DOI: 10.1002/eej.23401
Sakahisa Nagai, Toshiyuki Fujita, Hayato Sumiya, Osamu Shimizu, Hiroshi Fujimoto
{"title":"Reduction of magnetic field by low-order harmonics in magnetic resonant wireless power transfer system using high-frequency switching","authors":"Sakahisa Nagai,&nbsp;Toshiyuki Fujita,&nbsp;Hayato Sumiya,&nbsp;Osamu Shimizu,&nbsp;Hiroshi Fujimoto","doi":"10.1002/eej.23401","DOIUrl":"10.1002/eej.23401","url":null,"abstract":"<p>Recently, dynamic wireless power transfer (DWPT) for battery electric vehicles has been actively studied because it can enhance their cruising range and reduce their charging time. An SS type WPT circuit is simpler and more efficient than a WPT circuit with a filter, such as an LCC type WPT circuit. By contrast, the leakage magnetic field generated by the harmonic current is a problem that needs to be addressed. The leakage magnetic field is limited by the Radio Act and the Ordinance for Regulating Radio Equipment in Japan. This study aims to reduce the leakage magnetic field generated by the harmonic current using a high-frequency switching technology. The inverter and rectifier are operated using pulse width modulation (PWM) with a high carrier frequency. The effectiveness of the proposed method was experimentally verified using a GaN inverter and rectifier. As a result, the proposed method can drastically reduce the leakage magnetic field, especially, the magnetic field generated by the current harmonics of order greater than five.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 4","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85912928","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
Application of independent-left-and-right-wheel-driving force controller to torque vectoring differential with two-input-two-output motor drive system for electrified vehicles 独立左右轮驱动力控制器在电动汽车双输入双输出电机驱动系统转矩矢量差速器中的应用
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-05 DOI: 10.1002/eej.23400
Hiroyuki Fuse, Hiroshi Fujimoto, Kaoru Sawase, Naoki Takahashi, Ryota Takahashi, Yutaro Okamura, Ryosuke Koga
{"title":"Application of independent-left-and-right-wheel-driving force controller to torque vectoring differential with two-input-two-output motor drive system for electrified vehicles","authors":"Hiroyuki Fuse,&nbsp;Hiroshi Fujimoto,&nbsp;Kaoru Sawase,&nbsp;Naoki Takahashi,&nbsp;Ryota Takahashi,&nbsp;Yutaro Okamura,&nbsp;Ryosuke Koga","doi":"10.1002/eej.23400","DOIUrl":"10.1002/eej.23400","url":null,"abstract":"<p>A torque-difference-amplification torque vectoring differential (TDA-TVD), which is composed of a two-input-two-output system, has a great potential for cornering maneuverability; however, the overall controllability of slip ratio or driving force control is difficult owing to its complex mechanical structure. In order to enhance the controllability of TDA-TVD, this study proposes a design method to apply a driving force controller (DFC) with a decent slip ratio and driving force controllability, which was originally intended for independent wheel drive systems. An experimental verification on a slippery road using a real vehicle with the TDA-TVD indicated that the DFC can be applied to the TDA-TVD and that it improves the overall performance of the traction control.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 4","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83953008","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
Negative quadrant glitch suppression control of ball-screw-driven stage for machine tool by friction compensation and initial value compensation 基于摩擦补偿和初值补偿的机床滚珠丝杠工作台负象限毛刺抑制控制
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-02 DOI: 10.1002/eej.23402
Takumi Hayashi, Hiroshi Fujimoto, Yoshihiro Isaoka, Yuki Terada
{"title":"Negative quadrant glitch suppression control of ball-screw-driven stage for machine tool by friction compensation and initial value compensation","authors":"Takumi Hayashi,&nbsp;Hiroshi Fujimoto,&nbsp;Yoshihiro Isaoka,&nbsp;Yuki Terada","doi":"10.1002/eej.23402","DOIUrl":"10.1002/eej.23402","url":null,"abstract":"<p>Ball-screw-driven stages are widely used as feed systems of industrial equipment such as machine tools. Rolling friction in the stages causes a large tracking error called a quadrant glitch at a velocity reversal. Although the model-based friction compensation reduces the quadrant glitch, it often leads to a tracking error in the direction opposite to the quadrant glitch. This study aims to present a control system that reduces both the quadrant glitch and opposite-direction error. This is achieved by combining the model-based friction compensation and initial value compensation. The effectiveness of the proposed control system is verified by simulations and experiments with two-axis experimental setup.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 3","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88733245","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
Development of calculation method for melting amount mass of contact wire caused by melting and evaporation of molten metal bridge and arc generation 建立了金属桥液熔化、蒸发及电弧产生引起的接触丝熔化量、质量的计算方法
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-01 DOI: 10.1002/eej.23403
Honoka Morishita, Yoshifumi Maeda, Zhenwei Ren, Yusuke Nemoto, Takamasa Hayasaka, Toru Iwao
{"title":"Development of calculation method for melting amount mass of contact wire caused by melting and evaporation of molten metal bridge and arc generation","authors":"Honoka Morishita,&nbsp;Yoshifumi Maeda,&nbsp;Zhenwei Ren,&nbsp;Yusuke Nemoto,&nbsp;Takamasa Hayasaka,&nbsp;Toru Iwao","doi":"10.1002/eej.23403","DOIUrl":"10.1002/eej.23403","url":null,"abstract":"<p>As the mileage of the electric railway increases, the unevenness of the contact wire may separate the contact wire and the contact strip. Simultaneously, a disconnection arc discharge is generated by the molten metal bridge. This causes the contact wire to melt and evaporate causing it to break. A few studies have conducted experiments to prevent the contact wire from disconnecting. Based on the results thus obtained, they presented their hypotheses considering conditions sch as the current and time required for melting and evaporation of molten metal bridge and arc generation. In this study, a calculation method for the melting and disconnection phenomenon of the contact wire. Its mass increased when the currents from both sides of the contact wire were taken into consideration. Therefore, we obtained that the convection and radiation play an improtant role for calculation of the melting amount mass of contact wire.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 3","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86208488","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
Development of multi-port converter with square-wave-voltage multilevel converter and active power filter connected in series 方波电压多电平变换器与有源电力滤波器串联的多端口变换器的研制
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-01 DOI: 10.1002/eej.23387
Hiroki Watanabe, Mitsuru Miyasita, Jun-Ichi Itoh, Yuichi Noge, Masaki Ishibashi
{"title":"Development of multi-port converter with square-wave-voltage multilevel converter and active power filter connected in series","authors":"Hiroki Watanabe,&nbsp;Mitsuru Miyasita,&nbsp;Jun-Ichi Itoh,&nbsp;Yuichi Noge,&nbsp;Masaki Ishibashi","doi":"10.1002/eej.23387","DOIUrl":"10.1002/eej.23387","url":null,"abstract":"<p>This paper proposes a multi-port DC-AC converter with high efficiency and high-power density. The proposed circuit consists of a full bridge converter, a series active filter, and an unfolder circuit. The proposed circuit reduces the low switching losses owing to the square waveform operation with low switching frequency. In addition, the proposed converter improves the power density because the number of inductors is significantly reduced compared to the conventional multi-port converter. As the experimental result, the maximum efficiency of the proposed circuit reached 99.3%. Finally, the power density of the proposed converter is evaluated by the Pareto front curve. As the result, the power density of the proposed circuit was increased by 1.6 times in comparison with the conventional circuit.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 3","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114930836","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
Characteristics of electrical field of high-current air arc in restricted slit-like space by polymer plates 聚合物板限制狭缝空间内大电流空气电弧的电场特性
IF 0.4 4区 工程技术
Electrical Engineering in Japan Pub Date : 2022-09-01 DOI: 10.1002/eej.23386
Shinya Watanabe, Sosuke Uchino, Mitsugi Mori
{"title":"Characteristics of electrical field of high-current air arc in restricted slit-like space by polymer plates","authors":"Shinya Watanabe,&nbsp;Sosuke Uchino,&nbsp;Mitsugi Mori","doi":"10.1002/eej.23386","DOIUrl":"10.1002/eej.23386","url":null,"abstract":"<p>In restricted slit-like space by two polymer plates, the effects of the space width, current and atmospheric pressure on arc electrical field were investigated experimentally for high-current air arc above several kA. As a result of the evaluations, it was found that the electrical field increases significantly with the pressure rise under condition near 0 MPa-g, and it increases with current in the restricted space at the width less than 10 mm. Comparing the electrical field in using polymer with glass for the restricted material, it revealed that the electrical field has current dependence caused by the space width in addition to increasing effect to above 1.5–2 times by the ablation or spallation effects of the polymer.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"215 3","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86493917","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
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