• Journal of Electrical Engineering and Technology
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• v.12 no.4
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• pp.1683-1689
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• 2017

Wheelsets are an important component affecting the dynamic characteristics of railway vehicles. Research on wheelsets has been conducted for a long time. It is possible to generate the restoring force by the individual torque control of the left and right wheels in the independently rotating wheelsets (IRWs). Although this method solves the problems of conventional wheelsets, such as the solid axle wheelsets, the restoring force control must be added to the existing traction force control, and the restoring force requires a higher precision and quicker response than the traction force. In this paper, we study the robust control strategy of wireless trams with independently rotating wheelsets. The interior permanent magnet synchronous motor (IPMSM) and the controller with the actual scale wireless tram are designed to verify the torque control performance. Moreover, we propose an open loop control method to test and verify the traction and restoring force control algorithm of the IRWs.

• Journal of Electrical Engineering and Technology
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• v.11 no.4
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• pp.1042-1048
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• 2016

This paper presents a lateral displacement restoring force control for the independently rotating wheelsets (IRWs) of shallow-depth subway systems. In the case of the near surface transit, which has recently been introduced, sharp curved driving performance is required for the city center service. It is possible to decrease the curve radius and to improve the performance of the straight running with the individual torque control. Therefore, the individual torque control performance of the motor is the most important point of the near surface transit. This paper deals with a lateral displacement restoring force control for sharp curved driving. The validity and usefulness of the proposed control algorithm is verified by experimental results using a small-scale bogie system.