| Project/Area Number |
09650312
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
電力工学・電気機器工学
|
|---|
| Research Institution | Gifu University |
|---|
Principal Investigator |
ISHIKAWA Hiroki (1998) Gifu University, Faculty of Engineering, Research Assosiate, 工学部, 助手 (90273119)
村井 由宏 (1997) 岐阜大学, 工学部, 教授 (90021609)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Masaharu Gifu University, Faculty of Education, Professer, 教育学部, 教授 (30093339)
石川 裕記 岐阜大学, 工学部, 助手 (90273119)
|
|---|
| Project Period (FY) |
1997 – 1998
|
| Project Status |
Completed (Fiscal Year 1998)
|
| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
|
|---|
| Keywords | SR motor / inverter / current resonant / soft-switching |
|---|
| Research Abstract |
The SR motors are rigorously investigated in these days, and there are various kinds of SR motor drive circuits. Electric vehicle is one of the most promised field of reluctance motor applications because of their simple and rigid structure, and the future possibility of lower cost than that of induction motors' is also strongly focused point.
This motor has relatively high reactance and the stored excited energy has to be retrieved after each powering period. Therefore the energy retrieval period usually becomes longer and the shorter retrieval period is desired to obtain higher output power and higher efficiency.
For this purpose, some kinds of driving circuits are already proposed. Many of them are utilizing hard switching types, and they may cause high electro-magnetic interference (EMI) and lead to rather high switching losses. A soft-switched type drive-circuits with resonant circuit seems to have less EMI and less switching losses. However, they utilize continuous resonant-switchings, and may result in high resonant circuit losses.
This research studied with soft-switched type drive-circuit, including only four switching devices, and has the merits of low switching losses, low EMI, and higher efficiency. The proposed circuit is expected to provide a low-cost, highly efficient low-EMI system to meet the demand for further reductions in EMI by the experimental results.
|
