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Design of Three-Phase Axial Flux Permanent Magnet Generator Double-Side Internal Rotor for High-Speed Application

One of the important factors to support the successful development of a region is strongly influenced by the availability of electrical energy. The electrical energy is produced by a generator that converts mechanical energy into electrical energy. The axial flux permanent magnet generator (AFPMG) is a generator with the direction of the magnetic flux in the air gap parallel to the shaft of the generator. The generator process design will be discussed in this paper which is divided into four steps and was calculated by using analytical and numerical methods. The generator is designed to produce the output power of 20,000 watts, terminal voltage of 220 volts, frequency of 50 Hz, and rotor speed of 3,000 rpm. In the preliminary stages of the design process based on the analytical method, the output variables and the generator performance will be known manually. To ensure the accuracy of the results of the analytical method including the magnitude of the output variables and the generator performances, a software of two-dimension finite element software is used. The results of the validation show that the magnitude of the magnetic circuits resulted by the analytical method is able to distribute the magnetic flux without causing saturation to any part of its circuit. At a constant speed of 3,000 rpm, the variation of the current line affects the performance of the generator. When the generator is loaded with the resistive load under the full-load condition, the efficiency is 89.62%, the voltage regulation is 4.02 %, and the output power is 29,116.74143 watts.