Abstract
For the purpose of reducing noise caused by current collector that are located on super high-speed railways, a new concept of low-noise current collectors has been developed. This new low-noise current collector's features are a delta-shaped collector head directly supported by a composite insulator. It also has a conductor for conducting power received from the current collector to an electric circuit. Both the conductor and insulator are supported by the two-step hydraulic mechanisms. The vertical height of those apparatus are controlled by using an active control system so as to maintain the predetermined contact force of the contact strip against the trolley-wire. As a result on bench tests, where a lift of 127 [N] was applied, the contact force decreased to 95% by detecting the force cylinder and varying the desired rising force. It was also confirmed that the limit tracking performance against roughness of the trolley-wire was 28 [mmp-p] at 2 [Hz] where the contact break ratio at 300 [km/h] was 20% by a pantograph test machine using an active control system.
