Focusing on a rear-wheel steering (RWS) system with an integrated structure combining a planetary gear and an Axial Flux Permanent Magnet (AFPM) motor. The RWS system reduces the turning radius of the vehicle and enhances driving stability. Conventional RWS systems consist of separate components, including the steering motor, sensors, and gears. Specifically, the steering motor generates the torque to turn the wheels. A failure of the steering motor compromises driving safety and makes steering operation difficult. To overcome these issues, we proposed an integrated steering system structure that combines an AFPM motor with a planetary gear instead of the RFPM (Radial Flux Permanent Magnet) motor. In this study, a rear-wheel steering system with an integrated structure combining a planetary gear and an AFPM motor was applied, and its performance was evaluated through simulations. In the proposed steering system, the ball screw of the steering shaft was combined with the planetary gear of the AFPM motor. The movement of the ball screw generated the rotation of the wheels. The steering system incorporating the proposed AFPM motor with two stators showed improvements in torque and system redundancy compared to the steering system using the RFPM motor. Additionally, by applying two stators compared to one stator in the conventional RFPM motor, the proposed steering system did not lose the rear-wheel steering function even if one stator failed. The proposed system improved system redundancy and torque while enhancing driving stability in the event of a failure. Further validation of the proposed system requires the fabrication of an actual model and additional analysis.
Rear Wheel Steering System for Vehicles Using Axial Flux Permanent Motor
2023-08-11
2263566 byte
Conference paper
Electronic Resource
English