Comparative Evaluation on Power-Speed Density of Portable Permanent Magnet Generators for Agricultural Application

The comparative evaluation based on the power speed density of several types of portable Permanent Magnet Generator (PMG) considered for agricultural applications is presented.These generators are purposely designed to be used in agriculture sectors and thereby it should be of lightweight, small in size and ease to use.Six different generator topologies are developed for investigation of such purposes.A number of design parameters are considered to analyze the performance characteristics for each type of developed PMG.Based on the power speed density factor that is used to describe better generator performance, the suitable PMG for the agricultural application is identified through a comprehensive evaluation. INTRODUCTIONRecently, the demand for standalone power sources is increasing, in particular such as in agriculture, tourism, construction, landscape decoration, sports and military service.The standalone application requires an electrical supply that depends on the requirement of batteries with its limited power capability and reduced life cycle as with heavy loads.