Designing of a Permanent Magnet and Directly Driven Synchronous Generator for Low Speed Turbines

摘要

Micro scale hydro electric power plants are being used in outside national residential areas [1]. Here in such plants, turbine and alternator are coupled to each other by contrivances such as belt pulley and gear mechanism; afterwards the system can produce electricity [2]. Increase at speed difference between turbine and generator which is being run by turbine raises cost and complicacy of system, diminishes feasibility and efficiency. Hence, producers recommend that turbine must be fastened directly [2, 3, 5]. Michell-Banki turbines which are mostly preferred for small rivers drive the generator via belt pulley till 100 kW power, for more than 100 kW power, the generator is driven by turbine via gear box [3]. In this study, a generator which is structured from permanent magnets and driven directly by a Banki turbine has been designed instead of external excited one. It can decrease the setup and operational costs since that the designed permanent magnet generator can eliminate coupling contrivances at contemporary systems.