Abstract: A power supply system for converting and/or isolating charging power supplied to a vehicle charging system (VCS) within a battery operated vehicle. An isolation transformer allows electric isolation and/or voltage conversion between a primary power source (PPS) and the VCS. A terminal(s) of the transformer primary side is connectable to the PPS, and a terminal(s) of the transformer secondary side is connectable to the VCS. An EVSE control device is electrically connectable to the VCS. A data communication line connected to the EVSE control device and connectable to the VCS allows transmission of control signals to the VCS, monitoring coupling between secondary side and the VCS, and monitoring at least one parameter related to the charging status of the VCS during charging. The isolation transformer is a solid state transformer, and the isolation transformer and the EVSE control device constitutes an integrated unit, i.e., physically arranged in a common unit.

Abstract: The invention relates to a transmission system for transmitting signals between an inner and an outer unit separated by an annular pipe section wall, wherein said inner unit is provided with a first antenna and the second unit is provided with a second antenna, the antennas preferably constituted by coils, being adapted to be brought into essentially the same positions along the pipe section, wherein said pipe section is made from a material having low magnetic permeability and wherein at least one of the antennas is provided magnetic shield having high magnetic permeability, the corresponding antenna being positioned between the pipe wall and the magnetic shield and the magnetic shield extending along the length of the antenna.

Abstract: The invention relates to a transmission system for transmitting signals between an inner and an outer unit separated by an annular pipe section wall, wherein said inner unit is provided with a first antenna and the second unit is provided with a second antenna, the antennas preferably constituted by coils, being adapted to be brought into essentially the same positions along the pipe section, wherein said pipe section is made from a material having low magnetic permeability and wherein at least one of the antennas is provided magnetic shield having high magnetic permeability, the corresponding antenna being positioned between the pipe wall and the magnetic shield and the magnetic shield extending along the length of the antenna.