| Summary: | 碩士 === 崑山科技大學 === 機械工程研究所 === 105 === The purpose of this thesis is to design a coaxial magnetic gear (CMG). Coaxial magnetic gears are a new type of power-transmitting devices. By making use of neodymium-iron-boron (NdFeB), considered as a strong permanent magnet (PM), CMG has to go up the required torque (RT) to be able to boost an electric scooter (ES).
In order to achieve more accurate results, to calculate the magnetic torque (MT) and the magnetic flux density of the CMG, the use of software was required. Using gear ratio of 7:2, resulted in a MT of 160 N·m at full-load. Where the RT needed to boost the ES is also is 160N·m. However, RT and the MT are too exact, which causes an area of concern because a safety factor was not taken into consideration.
In the improved design section, a CMG with a MT of 200N·m is presented. Adjusting the size of the CMG elements, including the air-gap, allows a torque increase of 25%. The increase in the total volume of the CMG was about 6.52%.
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