Design study of single and three-phase synchronous generator using J-MAG designer

Synchronous Generator (SG) can be either using permanent magnet (PM) or field-excitation (FE) coil as their main flux sources are located in rotor part. However, synchronous generator using FE has advantages of variable flux control capabilities when compared to fix permanent magnet flux. In this research SG with various FEC configurations is investigated. Several slot-pole SG configurations such as 12S-4P, 12S-6P, 36S-12P, and 36S-18P are analyzed. The speed, maximum turns for the rotor and maximum turns for the stator are set to 1200 rpm, 28 turns and 8 turns respectively. JMAG version 12.0 is used for the geometry editor and analysis based on 2D-FEA to defined appropriate combination of stator and rotor pole number. Initially, each phase configuration is determined using flux linkage generated from coil test analysis and induced voltages are calculated. Furthermore, various winding configuration of concentrated and distributed are also considered during the design. In conclusion, the three-phase synchronous generators are obtained from 36S-12Pand 12S-4Pdesigns, while the single-phase are obtained from36S-18P and 12S-6P.