Design Considerations of Permanent Magnet High Speed Alternator for Solar Thermal Power Plant

Recently, the focus of designing a conventional alternator has been shifted to designing permanent magnet alternator. Due to the use of permanent magnet in rotor we achieve merits like reduction in size, high power density, thermal stability, low cost. While designing such type of alternator various issues one has to face, therefore there are certain design consideration which should be taken into account. The design considerations for permanent magnet high speed alternator has been worked out in the paper. Several factors viz. stator and rotor sizing, pole nos., bearing types, permanent magnets, etc. governing the performance of the machine to obtain the maximum efficiency has been described in detail and calculations have been performed using empirical relationship. The design of permanent magnet alternator is presented in this paper.