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The generator that normally used in the market, which is the iron-cored electricity generator has high cogging and starting torques. By redesigning of the iron-cored electricity generator, Axial-flux Permanent Magnet (AFPM) configuration minimizes the usage of ferrite material. AFPM, one of the coreless electricity generator configuration has a les...
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... the analysis of the gap distance between the magnetic pairs, the distance between the magnet pair is manipulated. In this analysis, it is using the open circuit configuration. Others parameter such as the material used on rotor and stator, magnet grade used and the number of coil turns per phase remain constant. There are total 5 different value of gap distance is analyzed with the distance between the magnet pairs of 12mm, 14mm, 16mm, 18mm, and 20mm respectively. For Figure 4, it shows the magnetic flux density contour plot for 20mm magnet pairs distance simulation. Figure 5 shows the voltage within the circuit with the distance between the magnet pair of 20mm while Figure 6 shows the magnetic flux within the circuit for the 20mm distance between magnet pair analysis. Table 2 is the result comparison of different magnet pair distance. When increasing the number of coil turns per phase, the result shows an increasing trend on voltage and magnetic flux within the coil. When increasing the number of coil turns per phase, it also increases the magnetic flux cutting rate, which cause the increasing of the voltage produced by the coil and magnetic flux in the coil as well. It is happening because with more turns of wire in the coil, the greater the strength of the static magnetic field around it. [28] Refer to the Figure 7, the magnetic flux density within the design is concentrated. It is because the material used on rotor and stator is plastic, which means there is no reaction with the magnetic field. Thus, the magnetic flux is concentrated in the coil ...
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Citations
A pico hydropower plant is an energy harvesting system that allows energy production using the power of the water flowing in small watercourses, and in water distribution network. Axial Flow Flux Permanent Magnet Synchronous Generator (AFPMSG) are particularly suitable for this application, being efficient machines that achieve high power with small dimensions. This paper presents a parametrical study of several configurations and topologies of three-phase and single-phase AFPMSG, for pico hydropower application, to assess the most suitable dimensional characteristics for the most energy production using a safe voltage of 25 V. The AFPMSGs here considered has a simple single stator and rotor configuration, commercial-type permanent magnets, and concentric windings, to facilitate their cost-effective construction and the spread of their use also in developing countries. For each AFPMSG considered, the power output was calculated using 3-D modelling and Finite Element Analysis; besides, the different parameters and features that affect the power output were evaluated at different rotational speeds. The results achieving a power density up to 100 W/cm3, at 1000 rpm with energy produced to 1.7 kWh/day.
