Internal design of permanent-magnet in-wheel motors for battery-powered traction applications

This paper discusses design aspects of low-speed, permanent-magnet in-wheel motors suitable for low-power traction applications; such as fork-lift trucks and wheelchairs. It also investigates the force density dependence on current density and slot depth, with the aid of finite element (FE) modelling. Results are presented for practical slot dimensions and their application to specific designs is discussed.