This study focuses on the design, fabrication, test and application of in-plane rotary electromagnetic micro-generator to obtain a high power output. The micro-generator comprises multilayer planar low temperature co-fired ceramics (LTCC) Ag micro-coil and multipole hard magnet of Nd/Fe/B. Finite element simulations have been carried out to observe electromagnetic information. The study also establishes analytical solutions for the micro-generator to predict the induced voltage. Three different configurations of planar micro-coils investigated, which are sector-shaped, circle-shaped, and square-shaped micro-coils. A prototype of the micro-generator is as small as 9¡Ñ9¡Ñ1 mm3 in volume size. The experimental results show that the micro-generator with sector-shaped micro-coil has the highest power output of 1.89 mW, and the effective value of the induced voltage of 205.7 mV at 13,325 rpm is achieved. In application, this study designed and fabricated a planar rotary electromagnetic energy harvester with a low rotary speed for use in bicycle dynamos. Finite element analysis and the Taguchi method were used to design this dynamo system. LTCC technology was applied to fabricate Ag planar multilayer coils with 20 layers. A 28-pole magnet Nd/Fe/B with an outer diameter of 50 mm and a thickness of 2 mm was also sintered and magnetized. This harvester system was approximately 50¡Ñ50¡Ñ3 mm3 in volume. The experimentally induced voltages for 20-layer coils were 1.539 V at the rotary speeds of 300 rpm. The power output was 0.788 mW with an external resistance load of 740 £[, and the efficiency was 26.62%. This harvester is capable of powering a minimum of 200 light emitted diodes (LEDs) (forward voltage (VF) <2.2 V and 20 mA) using a rotary speed of 250 rpm, and can be used for bicycle dynamo lighting.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0905112-102218 |
| Date | 05 September 2012 |
| Creators | Chen, Yong-Jheng |
| Contributors | S. C. Huang, S. C. Shen, C. Y. Su, Y. C. Chiou, T. F. Young, C. S. Lin, M. L. Wu, C. T. Pan |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0905112-102218 |
| Rights | user_define, Copyright information available at source archive |
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