Characteristics analysis of multiple in-wheel-induction-motors drive system

High speed maglev maintenance vehicle (MMV) is propelled by multiple in-wheel-induction-motors drive system (IWIM). This paper analyses the characteristics of multiple IWIM drive system for MMV. An electromechanical simulation platform is developed in our Lab. Adaptive flux observer is applied to provide speed sensor-less vector control for multiple IWIM drive system. The influences of different wheel radius, motor parameters and control schemes are simulated by setting different coefficient of radius and motor parameters. It shows that radius difference may seriously cause speed and traction force difference, and motor parameter difference may deteriorate dynamical performance. The coordinating motor control can improve the performance of multi-motors with less hard and software increase.