Pub Date : 2023-01-01DOI: 10.1541/ieejjia.22011386
T. Sakurai, H. Haga
{"title":"Power Decoupling Control of Electrolytic Capacitor-Less Dual-Inverter to Reduce Interharmonic Currents Under Periodic Load Fluctuation","authors":"T. Sakurai, H. Haga","doi":"10.1541/ieejjia.22011386","DOIUrl":"https://doi.org/10.1541/ieejjia.22011386","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67668553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1541/ieejjia.23001645
Eita Sato, K. Kondo
{"title":"Feasible Power Control Method with a Low Sampling Frequency for Bidirectional Wireless Power Transfer in Battery-Powered Railway Vehicle Systems","authors":"Eita Sato, K. Kondo","doi":"10.1541/ieejjia.23001645","DOIUrl":"https://doi.org/10.1541/ieejjia.23001645","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67669041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1541/ieejjia.23005684
Keita Takahashi, Takaaki Ibuchi, Tsuyoshi Funaki
The high-electromagnetic-interference (EMI)-noise area in a power circuit should be clarified when designing a low-EMI-noise power converter. For example, shielding of the power circuit prevents the EMI noise propagation to other circuits via near field couplings. It is important to know the high-EMI-noise area which should be shielded. The EMI noise distribution can be visualized by measuring the near-magnetic-field distribution above the power circuit. However, we cannot measure the near-magnetic-field distribution if there is not enough space for scanning a magnetic field probe between the power circuit and other circuits. Therefore, we propose to adopt a three-dimensional electromagnetic simulation for acquiring the near-magnetic-field distribution above a power circuit. In this paper, we study the validity of the frequency-domain noise-source model for the simulation of the near-magnetic field distribution. We evaluate the near-magnetic-field distribution maps for turn-on and turn-off of the transistor, respectively. The high-EMI-noise area differs depending on frequencies. The high-EMI-noise area for turn-on is different from that for turn-off. We have clarified that each high-EMI-noise area can be predicted by the simulation.
{"title":"Application of Frequency-Domain Noise-Source Model to Simulation of Time-Synchronized Near-Magnetic-Field Distribution above a Power Circuit","authors":"Keita Takahashi, Takaaki Ibuchi, Tsuyoshi Funaki","doi":"10.1541/ieejjia.23005684","DOIUrl":"https://doi.org/10.1541/ieejjia.23005684","url":null,"abstract":"The high-electromagnetic-interference (EMI)-noise area in a power circuit should be clarified when designing a low-EMI-noise power converter. For example, shielding of the power circuit prevents the EMI noise propagation to other circuits via near field couplings. It is important to know the high-EMI-noise area which should be shielded. The EMI noise distribution can be visualized by measuring the near-magnetic-field distribution above the power circuit. However, we cannot measure the near-magnetic-field distribution if there is not enough space for scanning a magnetic field probe between the power circuit and other circuits. Therefore, we propose to adopt a three-dimensional electromagnetic simulation for acquiring the near-magnetic-field distribution above a power circuit. In this paper, we study the validity of the frequency-domain noise-source model for the simulation of the near-magnetic field distribution. We evaluate the near-magnetic-field distribution maps for turn-on and turn-off of the transistor, respectively. The high-EMI-noise area differs depending on frequencies. The high-EMI-noise area for turn-on is different from that for turn-off. We have clarified that each high-EMI-noise area can be predicted by the simulation.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135442909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brushes enable the transfer of electrical current between stationary and moving conductors. Typical contacting components are a brush and commutator in direct-current machines and a brush and slip ring in alternating-current machines. In recent years, Ag–graphite brushes and noble-metal-coated slip rings have often been applied. However, there are many aspects concerning the sliding contact of these components that require clarification. This paper focuses on characteristics relating to the brush wear and contact voltage drop of Ag–graphite brushes when the Ag content is varied for a Au-plated slip ring. In this study, we conducted sliding tests, using Ag–graphite brushes (coated with Ag contents of 50, 60, 70, 80, and 90 wt%) and a Au-coated slip ring. The results showed the effects of the interposing layer on the brush wear and drop in contact voltage. In particular, there were three distinct compositional zones, namely a zone where the effect of graphite was dominant (Ag content of the brush of 50 wt%), a zone where both the graphite and Ag powder had influence (60–80 wt%), and a zone where the effect of Ag powder was dominant (90 wt%).
{"title":"Mechanism of the Sliding Contact of a Ag Ag–Graphite Brush against a Au Au-plated Slip Ring for Varying Ag Content","authors":"Naoki Fukuda, Koichiro Sawa, Minoru Aoyagi, Takahiro Ueno","doi":"10.1541/ieejjia.23003850","DOIUrl":"https://doi.org/10.1541/ieejjia.23003850","url":null,"abstract":"Brushes enable the transfer of electrical current between stationary and moving conductors. Typical contacting components are a brush and commutator in direct-current machines and a brush and slip ring in alternating-current machines. In recent years, Ag–graphite brushes and noble-metal-coated slip rings have often been applied. However, there are many aspects concerning the sliding contact of these components that require clarification. This paper focuses on characteristics relating to the brush wear and contact voltage drop of Ag–graphite brushes when the Ag content is varied for a Au-plated slip ring. In this study, we conducted sliding tests, using Ag–graphite brushes (coated with Ag contents of 50, 60, 70, 80, and 90 wt%) and a Au-coated slip ring. The results showed the effects of the interposing layer on the brush wear and drop in contact voltage. In particular, there were three distinct compositional zones, namely a zone where the effect of graphite was dominant (Ag content of the brush of 50 wt%), a zone where both the graphite and Ag powder had influence (60–80 wt%), and a zone where the effect of Ag powder was dominant (90 wt%).","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135800454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1541/ieejjia.22005294
Yong Woo Jeong, C. Chung
{"title":"Observer-based Robust Control: Its Application to Permanent Magnet Synchronous Motors","authors":"Yong Woo Jeong, C. Chung","doi":"10.1541/ieejjia.22005294","DOIUrl":"https://doi.org/10.1541/ieejjia.22005294","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67665656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1541/ieejjia.22004640
K. Fujisaki, S. Katsura
{"title":"Motion-Copying System with In-Tool Sensing","authors":"K. Fujisaki, S. Katsura","doi":"10.1541/ieejjia.22004640","DOIUrl":"https://doi.org/10.1541/ieejjia.22004640","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67665952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1541/ieejjia.22004763
T. Kashiwao, Masayuki Hiro, Keita Hayashi, Mikio Deguchi
{"title":"Machine-learning-based prediction of the three-dimensional (3D) position coordinates of 3D proximity sensing frames","authors":"T. Kashiwao, Masayuki Hiro, Keita Hayashi, Mikio Deguchi","doi":"10.1541/ieejjia.22004763","DOIUrl":"https://doi.org/10.1541/ieejjia.22004763","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67666030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1541/ieejjia.22007958
Takashi Sawada, H. Tadano, K. Shiozaki, T. Isobe
{"title":"Continuous Operation of a Half-Bridge with Multi-Parallel GaN Power Devices for Increased Current Capability","authors":"Takashi Sawada, H. Tadano, K. Shiozaki, T. Isobe","doi":"10.1541/ieejjia.22007958","DOIUrl":"https://doi.org/10.1541/ieejjia.22007958","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67667122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1541/ieejjia.22008145
Y. Koishi, A. Yamaguchi, Hiroki Goto
{"title":"Examination of Non-Sinusoidal Current Drive in Direct Current excited Reluctance Motor","authors":"Y. Koishi, A. Yamaguchi, Hiroki Goto","doi":"10.1541/ieejjia.22008145","DOIUrl":"https://doi.org/10.1541/ieejjia.22008145","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67667946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1541/ieejjia.22009525
Toshiki Ohori, Xiang Li, Hideyuki Nakanishi, Shigeki Ozawa, W. Hijikata
{"title":"Wireless Power Transfer System for Mobile Robots with Impedance Matching by Adjusting Position of Driver Coil","authors":"Toshiki Ohori, Xiang Li, Hideyuki Nakanishi, Shigeki Ozawa, W. Hijikata","doi":"10.1541/ieejjia.22009525","DOIUrl":"https://doi.org/10.1541/ieejjia.22009525","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67668404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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