This paper proposes a design and implementation of an axial type magnetic gear (MG) based on the composition of the magnetic arrangement. We report a quantitative comparison of two MG topologies with rectangular magnets arranged in series and parallel. Increased magnetic flux is done through magnetic circuit analysis and electrical circuit approach. Testing is done by using the rotation of a DC motor drive from 300-2600 rpm with a DC generator under load conditions. Measurement of load current and generator output power for both axial MG topologies are taken and analyzed. The results showed that the performance of an axial MG with the rectangular magnetic arrangement in parallel is better than that of a series arrangement. Based on the measured loading current of the two axial MG topologies, at generator rotation between 300-1300 rpm with 100, 200, and 300 Ω resistance loads show the same load current. Conversely, after a DC generator rotation approaches 1 2 of the maximum rotation (1300-2600 rpm) there is a significant increase in load current fluctuations. That is, with an increase of load currents occurring, the parallel magnetic topology shows an increase in load torque due to an increase of magnetic flux in the gear train magnets of the MG.
A novel method as proposed in the production of Calophyllum inophyllum biodiesel has been investigated experimentally. This study reports the results of biodiesel processing with electromagnetic induction technology. The applied method is aimed to compare the results of Calophyllum inophyllum biodiesel processing among conventional, microwave and electromagnetic induction. The degumming, transesterification, and esterification process of the 3 methods are measured by stopwatch to obtain time comparison data. Characteristics of viscosity, density, and fatty acid metil ester (FAME) are obtained from testing of a Gas Chromatography-mass Spectrometry (GCMS) at the Integrated Research and Testing Laboratory, Gadjah Mada University, Yogyakarta. The results present that the biodiesel produced by this method satisfies the biodiesel standards and their characteristics are better than the biodiesel produced by conventional and microwave methods. The electromagnetic induction method also offers a fast and easy route to produce biodiesel with the advantage of increasing the reaction rate and improving the separation process compared to other methods. This advanced technology has the potential to significantly increase biodiesel production with considerable potential to reduce production time and costs.
This experimental study examines the characteristics and performance of axial magnetic gear by using a variation of the rectangular neodymium-iron-boron (NdFeB) magnetic layer which is assembled on an acrylic disc. The aim is to reduce magnetic reluctance which can increase torque and facilitate the manufacture of magnetic gear. In addition, it can reduce the use of NdFeB permanent magnets instead of sectoral magnets. An appropriate method for predicting the transmitted torque produced by axial magnetic gears with four rectangular magnetic layers is demonstrated using the output power approach. The results show that the performance of axial magnetic-gear with 4 layers tends to be similar to the performance of a direct drive. Tests on the 2400 rpm rotation with the loading of 200, 300 and 400 ohms respectively showed a maximum torque of 2.24 (Nm) 10 -3 , 1.56 (Nm) 10 -3 , and 1.1 (Nm). The results of this paper appear to be useful for the development of axial magnetic-gear industrial applications.
This experimental study examines the characteristics and performance of axial magneticgear by using a variation of the rectangular neodymium-iron-boron (NdFeB) magnetic layerwhich is assembled on an acrylic disc. The aim is to reduce magnetic reluctance which canincrease torque and facilitate the manufacture of magnetic gear. In addition, it can reducethe use of NdFeB permanent magnets instead of sectoral magnets. An appropriate methodfor predicting the transmitted torque produced by axial magnetic gears with four rectangularmagnetic layers is demonstrated using the output power approach. The results show that theperformance of axial magnetic-gear with 4 layers tends to be similar to the performance ofa direct drive. Tests on the 2400 rpm rotation with the loading of 200, 300 and 400 ohmsrespectively showed a maximum torque of 2.24 (Nm) 10-3, 1.56 (Nm) 10-3, and 1.1 (Nm).The results of this paper appear to be useful for the development of axial magnetic-gearindustrial applications.
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