Design Radial-Flux Mini Permanent Magnet Generator

Utilization of renewable energy, such as water and wind always has constraints in the form of varying and not constant water or airflow velocity so that a generator is capable of working in that condition. This study aims to design a permanent magnet generator with a size calculated based on a target output power of 500 watts. The dimensions of the generator produced are calculated by the equation and produce a rotor diameter and core length of 108 mm and 52 mm. The generator is designed to have 18 slots, 16 poles and 3 phases. The generator is tested with different speed variations and no load. No-load test results with variations in the speed of 50 rpm, 250 rpm, 500 rpm, and 1000 rpm produces a voltage of 11.30 volts, 56.52 volts, 113.04 volts, 169.53 volts, and 226.08 volts. After that, the generator is tested with load variations 5 Ω, 10 Ω, 15 Ω, and 20 Ω in order to get the value of its power and efficiency. The highest power produced at a speed of 500 rpm is 580,791 watts. The highest power produced by the generator is at a speed of 1000 rpm which is 1170.53 watts. the highest efficiency produced by this permanent magnet generator is 79.76%.