Projeto de sistema trativo elétrico sem reduções mecânicas para veículos elétricos leves desenvolvido a partir de coleta e análise de dados de sistema real

Abstract

Light electric vehicles (LEV) of the electric skate type are traditionally built with a tractive system that makes use of synchronous belt transmission. In this work, a motor is proposed that is directly coupled to the wheel without the use of mechanical reductions. For this, usage data was collected on an electric skateboard built by the author, it was processed and torque and speed requirements were defined as well as torque and speed pairs vectorsthroughout the data collection course. For the design of the new engine, available stator geometries were analyzed and the best candidates selected using a spreadsheet. Of these, several variations were analyzed using the Motor XP-PM brushless motor design software, again the best candidates were selected and the performance data simulated in a virtual route equivalent to that used for data collection. The candidate motor chosen has dimensions of 93 mm in diameter and 109.5 mm in length, an 80 mm diameter stator with 24 teeth and a 28-pole rotor of class N42SH magnets. This is capable of a maximum torque of 31 N.m.