Publication: Water turbine AXIAL generator
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Date
2024-08
Authors
Nurul Amiza Syariza binti Nadzri
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Abstract
This project investigates the design, development, and testing of a small-scale water turbine integrated with an axial generator to harness energy from modest water flows, addressing the increasing global demand for decentralized and sustainable energy solutions. The axial flux (disc shape) permanent magnet machine is an attractive alternative to radial flux machines in water turbine applications. The axial flux configuration is amenable to the low-speed, high-torque operation of a direct drive hydro energy system. The main focus of this study is to improve the power output and efficiency of hydro power generation by investigating the electromagnetic and structural features of a coreless axial generator. The generator uses trapezoidal shape coil winding to obtain a greater active length than that provided by circular shape coil winding. The axial generator here considered has a simple single stator and rotor configuration, NdFeB permanent magnets, and concentric windings, to facilitate their cost-effective construction. The power output was calculated using 3-D modelling and Finite Element Analysis at different speed before proceeding to hardware fabrication. By setup a test in controlled environment, the axial generator prototype is testing with different parameters and features that affect the power output were evaluated at different rotational speeds. The simulation results achieving a induced voltage 18V at
180 rpm compare to prototype result with only 0.17V at the same speed. The prototype can achieve induced voltage around 1.61 V with rotor speed at 1500 rpm. Thus, this study shows with the same design the induced voltage in simulation is completely different with prototype result. Sinusoidal waveform of induction voltage with the acceptable harmonic characteristics confirms the optimized design of the generator.