A non-contact power feeding device includes multiple power feeding elements that are disposed spatially separated from one another in a movement direction, an AC power supply that supplies AC power to the power feeding elements, multiple power receiving elements that are provided in a moving body and that receive AC power in a non-contact manner, and a power receiving circuit that converts the AC power received by the power receiving elements and that outputs to an electrical load. When a length of the power feeding elements in the movement direction is LT, a separation distance between the power feeding elements is DT, a length of the power receiving elements in the movement direction is LR, and a separation distance between the power receiving elements is DR, the relationship DT≤DR and the relationship (2×LR+DR)≤LT are satisfied.

A ground contact unit for a vehicle battery charging system comprises a base body, at least one potential layer, a plurality of contact areas, a plurality of switching units and a plurality of switching lines by means of which the switching units can be actuated, wherein a plurality of switching units are provided on each of the switching lines. The switching lines are subdivided into at least two groups, and each of the switching units is provided on at least two switching lines from at least two different groups, so that the switching state of the switching unit depends on the signal state on its associated switching lines. Each switching unit is coupled to at least one contact area such that the switching unit can electrically connect and interrupt the corresponding at least one contact area to the at least one potential layer assigned to the contact area.

A method of switching a contact area is also shown.

A charging vehicle (1) for charging an electric vehicle (2) has a charging system (3), a charging regulator (4), a control device (5) and a contact system (6). The charging system (3) is connected to the charging regulator (4) and the contact system (6). The contact system (6) serves to supply the charging vehicle (1) with electric energy. The charging system (3) is a contactless charging system (3). The charging vehicle (1) can be controlled by the control device (5) in a longitudinal direction and a transverse direction and can be positioned, by the control device (5), into a charging position (7).

A charging vehicle (1) for charging an electric vehicle (2) has a charging system (3), a charging regulator (4), a control device (5) and a contact system (6). The charging system (3) is connected to the charging regulator (4) and the contact system (6). The contact system (6) serves to supply the charging vehicle (1) with electric energy. The charging system (3) is a contactless charging system (3). The charging vehicle (1) can be controlled by the control device (5) in a longitudinal direction and a transverse direction and can be positioned, by the control device (5), into a charging position (7).

A contactless power supply system is provided for supplying electric power to a vehicle in a contactless manner during traveling of the vehicle. The contactless power supply system includes a plurality of primary coils installed along a traveling direction in a road and a secondary coil mounted to the vehicle. Each of the primary coils is a single-phase coil with the secondary coil being a multi-phase coil, or is a multi-phase coil with the secondary coil being a single-phase coil.

In one embodiment, a static wireless power transfer (WPT) system (with charging spots and non-charging parking spots) receives a request to charge a vehicle. The device schedules a period of time during which the vehicle is allocated access to a particular charging spot based on scheduling characteristics and one or more other vehicles also requesting charging. The device may then send instructions to control the vehicle to autonomously move from a current parking spot to the particular charging spot for the scheduled period of time, the instructions precisely aligning the vehicle in the particular charging spot for optimum power transfer based on a charging coil of the vehicle and a respective ground-based charging coil of the particular charging spot. After the scheduled period of time, the device may send additional instructions to control the vehicle to autonomously move out of the particular charging spot.

In one embodiment, a static wireless power transfer (WPT) system (with charging spots and non-charging parking spots) receives a request to charge a vehicle. The device schedules a period of time during which the vehicle is allocated access to a particular charging spot based on scheduling characteristics and one or more other vehicles also requesting charging. The device may then send instructions to control the vehicle to autonomously move from a current parking spot to the particular charging spot for the scheduled period of time, the instructions precisely aligning the vehicle in the particular charging spot for optimum power transfer based on a charging coil of the vehicle and a respective ground-based charging coil of the particular charging spot. After the scheduled period of time, the device may send additional instructions to control the vehicle to autonomously move out of the particular charging spot.

A power transmitting apparatus wirelessly transmits power to a power receiving apparatus, and communicates with the power receiving apparatus. The power transmitting apparatus transmits, to the power receiving apparatus, a signal to request a change in a degree of modulation of a load modulation signal, which is received from the power receiving apparatus, in accordance with an amplitude of the load modulation signal.

A power transmitting apparatus wirelessly transmits power to a power receiving apparatus, and communicates with the power receiving apparatus. The power transmitting apparatus transmits, to the power receiving apparatus, a signal to request a change in a degree of modulation of a load modulation signal, which is received from the power receiving apparatus, in accordance with an amplitude of the load modulation signal.

The invention relates to a method and an arrangement for inductive positioning of a current collector (14; 24) on a vehicle relative to a stationary current conductor (13; 23; 33; 43; 53). The invention involves transmitting a signal having predetermined phase characteristics using a signal transmitter (37; 47; 57) arranged along the longitudinal direction of the current conductor (13; 23; 33; 43; 53); detecting the transmitted signal using a signal receiver on the vehicle, which signal receiver comprises at least one vertical antenna (30; 40; 50a, 50b); detecting the phase characteristics of the signal induced in the at least one vertical antenna (30; 40; 50a, 50b), indicating the relative location of the vertical antenna (30; 40; 50a, 50b) and the signal transmitter (37; 47; 57) in the transverse direction of the vehicle; and controlling the positioning means (25, 26) in dependence of the received signals.