Electronically controlled pneumatic (ECP) brake system achieves better brake consistency because of fast braking command transmission, but the practical application is limited by the lack of power transmission in standard railway freight wagons. This paper presents the excitations analysis, design, modelling and experimental validation of a novel self-powered device (SPD) utilizing vertical mechanical energy of freight car for onboard power supply. The device with ball crew, mechanical motion rectifier, gearbox and generator converts the bi-directional vertical translation between the car body and bogie into the unidirectional rotation of generator. The electromechanical coupled model of SPD is established to predict the performance versus different load conditions and train speeds. A peak voltage of 29.3 V and an average power of 50.26 W with 16 Ω external resistance are obtained when the full-loaded vehicle speed is 100 km/h, which indicates the potential of single device to power the wireless ECP brake system and sensor nodes simultaneously. The experiments are carried out and the results are in good agreement with the simulations. Moreover, the SPD adapts well to the broadband characteristics of railcars vertical vibration. The experimental results show that an average power of 4.6 W is achieved even in unfavorable condition. This onboard SPD as distributed power supply in unpowered freight car will realize the popularization of more smart devices and improve the overall performance of heavy-haul trains with long group.

电控气动（ECP）制动系统由于快速的制动指令传输而实现了更好的制动一致性，但实际应用受到标准铁路货车中缺乏动力传输的限制。本文介绍了一种新型的自供电设备（SPD）的励磁分析，设计，建模和实验验证，该设备利用货车的垂直机械能为车载电源供电。该设备具有排球员，机械运动整流器，变速箱和发电机，可将车身和转向架之间的双向垂直平移转换为发电机的单向旋转。建立了SPD的机电耦合模型，以预测不同负载条件和列车速度下的性能。峰值电压为29.3 V，平均功率为50。当满载速度为100 km / h时，可获得16 W的26 W外部电阻，这表明单个设备有可能同时为无线ECP制动系统和传感器节点供电。进行了实验，结果与仿真结果吻合良好。而且，SPD很好地适应了铁路车辆垂直振动的宽带特性。实验结果表明，即使在不利条件下，平均功率也可达到4.6W。这种车载SPD作为无动力货车中的分布式电源，将实现更多智能设备的普及，并提高长队重型火车的整体性能。这表明单个设备同时为无线ECP制动系统和传感器节点供电的潜力。进行了实验，结果与仿真结果吻合良好。而且，SPD很好地适应了铁路车辆垂直振动的宽带特性。实验结果表明，即使在不利条件下，平均功率也可达到4.6W。这种车载SPD作为无动力货车中的分布式电源，将实现更多智能设备的普及，并提高长队重型火车的整体性能。这表明单个设备同时为无线ECP制动系统和传感器节点供电的潜力。进行了实验，结果与仿真结果吻合良好。而且，SPD很好地适应了铁路车辆垂直振动的宽带特性。实验结果表明，即使在不利条件下，平均功率也可达到4.6W。这种车载SPD作为无动力货车中的分布式电源，将实现更多智能设备的普及，并提高长队重型火车的整体性能。实验结果表明，即使在不利条件下，平均功率也可达到4.6W。这种车载SPD作为无动力货车中的分布式电源，将实现更多智能设备的普及，并提高长队重型火车的整体性能。实验结果表明，即使在不利条件下，平均功率也可达到4.6W。这种车载SPD作为无动力货车中的分布式电源，将实现更多智能设备的普及，并提高长队重型火车的整体性能。