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| dc.contributor.author | Oketch Odhiambo Akello, Philip | |
| dc.date.accessioned | 2016-05-30T11:50:26Z | |
| dc.date.available | 2016-05-30T11:50:26Z | |
| dc.date.issued | 2016-05-30 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/2105 | |
| dc.description | Master of Science in Energy Technology | en_US |
| dc.description.abstract | Mr. Francis Xavier Ochieng’ JKUAT, Kenya Dr. Joseph NgugiKamau JKUAT, Kenya | en_US |
| dc.description.sponsorship | There islow penetration of Small Wind Turbines (SWTs) in Kenya mainly caused by high cost of the technologyparticularly the drive train (gearbox and/or generator). The gearbox is the main course ofdowntime in locally manufactured wind turbines. Imported SWTs are also expensive (including their spare parts) and the skill required for their maintenance is locally inadequate. This study presents the design and development of a low costdirect-drive Axial Flux Permanent Magnet (AFPM) generator that utilizes locally available materials and eliminates the use of gearbox. It is designed for ease of manufacture in small workshops using basic tools and with limited electro-mechanical engineering knowledge. The mainobjective of the study was to design, fabricateand analyse the performance of the AFPM generator for SWT power generation. The machine configuration consists of two rotor disks, permanent magnets, stator support, windings, and car hub bearing. The methodology used involved stratified random sampling, questionnaires and face to face interviews of SWT manufacturers;computational electro-mechanical design using FEMM 4.2 software; and prototype development and testing. Performance equations and Finite Element Analysis (FEA) were used to analyse generator performance, while theLevelised Cost of Electricity (LCOE) was used for economic analysis. While the AFPM generator configuration presented is not new, the generator assembly is however reinforced using astrong T-frame to improve generator stability and provide a flexible mounting support for use in both Horizontal Axis Wind Turbines (HAWTs) and Vertical Axis Wind Turbines (VAWTs) rotor blades. The generatorcosts Kshs 58,228 which is 35 – 41% cheaper than the existing SWT transmission systems in the market with similar power rating. The generator attains a maximum efficiency of 89%which is reasonably high as the maximum efficiency of a typical AFPM generator is in the range of 90 to 97%. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Jomo Kenyatta University of Agriculture and Technology | en_US |
| dc.subject | Development of a Low Cost Direct-Drive Permanent Magnet Generator | en_US |
| dc.subject | Power Generation in Small Wind Turbines | en_US |
| dc.subject | Master of Science in Energy Technology | en_US |
| dc.title | Development of a Low Cost Direct-Drive Permanent Magnet Generator for Power Generation in Small Wind Turbines | en_US |
| dc.type | Thesis | en_US |
