Track: Undergraduate Student Paper Competition

Abstract

In this paper, a type of Outer permanent magnet (PM) motor designs is proposed for E scooter application as spindle motors. An existing permanent magnet motor has maximum speed of 50km/h with an electric motor 5kW-5000 rpm. In order to improve high speed operation, a higher speed electric motor 5.5 kW and 7000 rpm can run up to 70km/h. An Outer Permanent Magnet (PM) motor alternatives are designed and optimized in detail with optimal magnetic segment shape. The electromagnetic results of PM V shape motors are compared with the reference Outer U shape Permanent Magnet (SPM) motor for the same design requirements. Detailed loss analysis is also performed for the desired motor structure at high speeds. A prototype motor is manufactured, and initial experimental tests are performed. Detailed comparison between Finite Element Analysis and test data are also presented. It is shown that it is possible to have an optimized PM motor for such high-speed spindle application. This paper will figure out optimal angle of magnetic V shape for maximum torque and minimum torque ripple.