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At present, the inner rotor or outer rotor BLDC motors are generally used in the electric motorbikes. However, the outer rotor BLDC motors are fast finding applications in wheels of an electric bike for fewer core losses and higher efficiency. But still, the speed of the bikes available in the market is quite low or if people go for some more top speed electric bikes that are very costly. So, in this work, two high speed 36 slots, 24 poles exterior rotor motors are designed for the high-speed, smooth operation of an electric bike. The design of the Hub motors is done based on the hand calculations of the design parameters. Then the RMxprt models are designed using those calculated data, and various iterations are performed for getting the required design. But here, just the final design sheets and plots are shown. Also, the RMxprt models are converted to Maxwell 2D design model for further analysis and accurate and precise design. This paper consists of a comparative study of both the designs based on these calculations, results and graphs. This research work gives a clear concept to the reader for selecting a suitable model according to their applications.
Inspec keywords: rotors; motorcycles; machine control; brushless DC motors; finite element analysis
Subjects: d.c. machines; Finite element analysis; Control of electric power systems