Commercial applications for battery powered autonomous vehicles used in air, land and sea environments will grow exponentially in the next few years. The drone application is the most popular of these applications in the present time. Currently most of the present applications use a special low weight design of the radial flux permanent magnet outer rotation motor. These applications need the low weight to allow a higher payload and a very low resistance to allow longer flight times. The Axial Flux motor can also be made in this type of design of a motor with a short height and a large OD and ID to minimize weight and resistance. This case study will compare the low weight Axial Flux design with both the inner rotation and outer rotation radial flux motor. The motor case study will be for a 3.5-inch diameter and 1.25 inch length motor. The input and output conditions will be the same and the weight and resistance of the three magnetic circuits will be compared. This case study will also compare the cost and reliability of the three motor types.
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