Effected Study of Magnetic Twist Angle on Performance of Generator for a Small Hydropower Plant

Abstract

The objective of this research is to design, build and test a permanent magnet generator for community-scale hydropower facilities, as well as to investigate the influence of permanent magnet groove twist angle on generator performance. By creating a generator Use #20 copper coil to wind the coil at 320 turns per slot. Use 9 coils of coil and study 2 magnetic sets. The first set of magnets are not twisted, and the second magnet is twisted at a 30o angle into a magnetic groove. Each set uses 24 pieces of 50 mm x 25 mm x 10 mm magnets and has a magnetic field strength of 0.65 T per piece. Permanent magnets are connected to the coil unit, with a spacing between the two locations of 2.75 mm. The generator was tested at 100-500 RPM, using four 24 V 60 W lamps as the load. The results showed that the voltage was higher when the rpm was higher and it was found that the first set of magnets had higher voltage, current and power than the magnets of the second set. At the 500 RPM, the highest voltage, current and power were 103.70 V, 2.55 A and 264.43 W, respectively.