| Author | Takahashi, Norio| Ochi, Yoshiyuki| Nakano, Katsumi| Shimada, Koji| Wakasono, Hiromi| |
|---|---|
| Published Date | 2002-05-17 |
| Publication Title | Magnetics |
| Volume | volume38 |
| Issue | issue5 |
| Content Type | Journal Article |
| Author | Gotoh, Yuji| Takahashi, Norio| |
|---|---|
| Published Date | 2003-5 |
| Publication Title | Magnetics |
| Volume | volume39 |
| Issue | issue3 |
| Content Type | Journal Article |
| Author | Nakase, Tomoya| Nakano, Masanori| Fujiwara, Koji| Takahashi, Norio| |
|---|---|
| Published Date | 1999-03-05 |
| Publication Title | Magnetics |
| Volume | volume35 |
| Issue | issue5 |
| Content Type | Journal Article |
| Author | Miyagi, Daisuke| Saitou, Aisya| Takahashi, Norio| Uchida, Naoki| Ozaki, Kazuhiro| |
|---|---|
| Published Date | 2006-2 |
| Publication Title | Magnetics |
| Volume | volume42 |
| Issue | issue2 |
| Content Type | Journal Article |
| Author | Okamoto, Yoshifumi| Akiyama, Koji| Takahashi, Norio| |
|---|---|
| Published Date | 2006-4 |
| Publication Title | Magnetics |
| Volume | volume42 |
| Issue | issue4 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/15762 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_18_1_1.pdf |
| Author | Nakata Takayoshi| Takahashi Norio| |
| Abstract | The quantitative analysis of localized flux distributions in transformer cores has become easy through the progress of numerical field calculations. In this paper, the effects of core constructions, joint configurations, magnetizing characteristics of materials on the flux distributions are examined using newly developed techniques such as a gap element, an approximate method for solving three-dimensional magnetic fields, the time periodicity finite element method, an efficient technique for treating hysteresis characteristics and so on. A method for the optimum design of transformer cores is also discussed. Main results obtained can be summarized as follows: (a) The building factor of the core made of higely-oriented silicon steel is larger than that of the conventional core. (b) The iron losses at joints are much affected by overlap lengths, number of laminations per stagger layer and a small irregularity of the arrangement of sheets. (c) It is clarified that examinations of the optimum construction of core and the most desirable magnetic characteristics of core material are possible using the finite element method. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1984-03-30 |
| Volume | volume18 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 31 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307976 |
| JaLCDOI | 10.18926/15736 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_14_1_15.pdf |
| Author | Ishihara Yoshiyuki| Takahashi Norio| |
| Abstract | Characteristics of iron losses in silicon steel due to inclined rotating fluxes and distorted ones are described. Iron losses due to rotating fluxes have been measured at various conditions for grain-oriented and non-oriented silicon steels by using an improved thermistor-bridge method. Loss measurements indicate that the iron loss due to the inclined rotating flux is greater than that due to the non-inclined one. However, the iron loss due to the distorted rotating flux is not always greater than that due to the non-distorted one. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1979-12-01 |
| Volume | volume14 |
| Issue | issue1 |
| Start Page | 15 |
| End Page | 28 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307734 |
