DISPOSITIF ANTI-PARASITES POUR UN PANTOGRAPHE D'ALIMENTATION D'UN VEHICULE ELECTRIQUE

摘要

1484955 Current collectors JAPANESE NATIONAL RAILWAYS 1 Aug 1975 [3 Aug 1974 27 Dec 1974] 32309/75 Heading B7L A current collecting pantograph structure includes one or more high-frequency current suppressing elements 22 mounted in or on respective frame members 2-9 and 21-91 of the structure to prevent radio and TV interference due to spark discharge between the pantograph slipper 1 and trolley wire T. The current suppressing elements consist of a conductor installed parallel to the respective frame member, a hollow cylinder mounted on the frame member - one end of the cylinder being closed and the other end open, or a magnetic alloy or ferrite layer formed on the exterior of the conductor or in a notch in the conductor. In the former case the conductor is electrically connected to its frame member by one end or by an intermediate point if two high frequency currents are to be suppresed. Likewise, two or more hollow, coaxial cylinders may be mounted on a frame member to suppress two or more high-frequencies. The open end of the cylinder may be connected to its frame member by a capacitor. The effective length of the current suppressing element is “ the wavelength of the high frequency current to be suppressed or an odd multiple thereof. The pantograph base 13 is insulated from an insulator panel 16 in the vehicle roof by insulators 14. A high-frequency current suppressing element 22 is provided on the conductor 15 supplying current from the pantograph to the vehicle motor.