PRODUCING ELECTROMAGNETIC FIELDS FOR TRANSFERRING ELECTRIC ENERGY TO A VEHICLE

摘要

A system and a method for transferring electric energy to a vehicle, in particular to a track bound vehicle such as a light rail vehicle are disclosed. The system comprises an electric conductor arrangement for producing an alternating electromagnetic field and for thereby transferring the energy to the vehicle. The electric conductor arrangement comprises at least one alternating current line and each alternating current line is adapted to carry one phase of an alternating electric current. The conductor arrangement comprises a plurality of consecutive segments and a direct current supply line. The segments extend along the path of travel of the vehicle and each segment comprises one section of each of the at least one alternating current line. The direct current supply line is for supplying electric energy to the segments. Each segment is connected to the supply line via at least two inverter which is adapted to invert a direct current carried by the supply line to an alternating current carried by the at least one alternating current line. The first inverter connects the supply line to a first end of the section(s) of a segment and the second inverter connects the supply line to a second end of the section(s) of the same segment or of the section(s) of a consecutive row of segments. The first end and the second end are opposite ends of the segment or of the row of segments, and the system is adapted to operate the first inverter and the second inverter at a predefined phase shift relative to each other, thereby producing an alternating voltage across the segment or row of segments, which alternating voltage causes a corresponding alternating current to flow through the segment or row of segments.