Abstract
Railway vehicles with conventional sets often cause problems of hunting and severe wear. The use of an independently rotating wheel set (IRW) would eliminate the cause of wheel set hunting and wear since an IRW can decouple the wheels. This paper presents an investigation into the design of a suitable motor configuration and controller for IRW in order to provide the stability required to satisfy the performance requirements. A computer model of the mechanical and electrical parts of the system was developed. Simulation and experiments of the wheelsets with active driving motor control have demonstrated that a wheelset with independently driven wheels has a good stability performance over a traditional wheelset. Controllers with indirect field orientation control for dynamic control of a motor have shown to be suitable for this application in both its response and its controllability.
Highlights
It is well known that railway vehicles with conventional wheel sets experience problems of hunting and severe wear
The use of independent wheels could eliminate the cause of wheelset hunting and reduce the wheel wear since independently rotating wheelset (IRW) can decouple the wheels
The IRW for railway vehicles has been under serious consideration at a theoretical and experimental level for thirty years
Summary
It is well known that railway vehicles with conventional wheel sets experience problems of hunting and severe wear. The use of IRW would eliminate the guidance capability of the railway vehicles. A compromise could be achieved between the excellent stability behaviour of IRW and the guidance capability by use of active controls like yaw control, creep control or damping, and stiff control. This paper presents a successful dynamic control simulations for independently rotating wheels and validates all simulation results by a new designed test rig. Instead of adopting very complex and impractical sensor feedback systems, a simple but effective yaw feedback control mechanism was implemented. It could significantly reduce the control complexity for independently rotating wheelsets.
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