| Presentation | 2017-06-22 Mechanical Fan-to-Windmill Power Transfer Boils Down to the Steady-State kQ Theory Takashi Ohira, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper considers the power transfer phenomenon of a fan-to-windmill system. We assume that the system consists of only mechanical components exhibiting passiveness, reciprocity, and linearity. The fan is mechanically driven at a constant torque and generates air-flow power. The windmill receives the power and also reaches a constant-torque rotation. In such a steady-state motion, the torque is expressed as a linear combination of the angular velocities. An engineering interest is taken in the power transfer efficiency, which is defined as the receive-to-transmit power ratio. We derive a formula of power transfer efficiency in terms of the loading viscous coefficient. The load can be adjusted to lead the efficiency to its peak. The deduced maximum efficiency formula looks complicated. We then serendipitously introduce a figure of merit called kQ, which rewrites the formula into quite an elegant fashion. We also display a graphical chart that enables one to comprehend how the maximum power transfer efficiency relates to kQ. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | power transfer theory / torque / angular velocity / optimum load / kQ / maximum efficiency |
| Paper # | MW2017-24 |
| Date of Issue | 2017-06-15 (MW) |
| Conference Information | |
| Committee | MW |
|---|---|
| Conference Date | 2017/6/22(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | A-101, Wing-A, Toyohashi University of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave Signal Generation and Measurement / Microwave Technologies |
| Chair | Masahiro Muraguchi(TUC) |
| Vice Chair | Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTTdocomo) / Kenichi Tajima(Mitsubishi Electric) |
| Secretary | Yoshinori Kogami(Tokyo Inst. of Tech.) / Hiroshi Okazaki(HITACHI) / Kenichi Tajima |
| Assistant | Satoshi Ono(Univ. of Electro-Comm.) / Mizuki Motoyoshi(Tohoku Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Microwaves |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Mechanical Fan-to-Windmill Power Transfer Boils Down to the Steady-State kQ Theory |
| Sub Title (in English) | |
| Keyword(1) | power transfer theory |
| Keyword(2) | torque |
| Keyword(3) | angular velocity |
| Keyword(4) | optimum load |
| Keyword(5) | kQ |
| Keyword(6) | maximum efficiency |
| Keyword(7) | |
| 1st Author's Name | Takashi Ohira |
| 1st Author's Affiliation | Toyohashi University of Technology(Toyohashi Univ. of Tech.) |
| Date | 2017-06-22 |
| Paper # | MW2017-24 |
| Volume (vol) | vol.117 |
| Number (no) | MW-104 |
| Page | pp.pp.15-18(MW), |
| #Pages | 4 |
| Date of Issue | 2017-06-15 (MW) |