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| Presentation | 2017-06-22 15:25 Mechanical Fan-to-Windmill Power Transfer Boils Down to the Steady-State kQ Theory Takashi Ohira (Toyohashi Univ. of Tech.)  MW2017-24 Link to ES Tech. Rep. Archives: MW2017-24 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | power transfer theory / torque / angular velocity / optimum load / kQ / maximum efficiency / / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 104, MW2017-24, pp. 15-18, June 2017. | |
| Paper # | MW2017-24 | |
| Date of Issue | 2017-06-15 (MW) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | MW2017-24 Link to ES Tech. Rep. Archives: MW2017-24 |
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| Conference Information | |
| Committee | MW |
| Conference Date | 2017-06-22 - 2017-06-23 |
| 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 |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2017-06-MW |
| Language | Japanese |
| 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) | |
| Keyword(8) | |
| 1st Author's Name | Takashi Ohira |
| 1st Author's Affiliation | Toyohashi University of Technology (Toyohashi Univ. of Tech.) |
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| Speaker | Author-1 |
| Date Time | 2017-06-22 15:25:00 |
| Presentation Time | 25 minutes |
| Registration for | MW |
| Paper # | MW2017-24 |
| Volume (vol) | vol.117 |
| Number (no) | no.104 |
| Page | pp.15-18 |
| #Pages | 4 |
| Date of Issue | 2017-06-15 (MW) |
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