Techniques for wirelessly transferring energy to a vehicle are disclosed. An example method for wirelessly transferring energy to a vehicle according to the disclosure includes detecting a ripple frequency on a transmitter coil circuit, such that the ripple frequency is associated with a vehicle switch mode controller frequency of a switch mode controller in the vehicle, and providing an electrical current to a coil in the transmitter coil circuit based at least in part on the ripple frequency.

A power storage amount control device includes a processor configured to acquire a value of a parameter representing a predicted power consumption amount of a load, set target power storage amounts of a plurality of power storage devices based on the value of the parameter representing the predicted power consumption amount, transmit a signal to the power storage device such that the power storage amount of the power storage device is equal to or larger than the set target power storage amount, and set the target power storage amount of a first power storage device supplying the power to a first load higher than the target power storage amount of a second power storage device supplying the power to a second load of which the predicted power consumption amount is smaller than that of the first load.

A vehicle system includes a controller configured to, responsive to an alignment mode, disable a power rectifier configured to transfer charge between a secondary coil and battery, and enable a precision rectifier to output a voltage responsive to current induced in the secondary coil resulting from current through a corresponding primary coil, and responsive to the voltage exceeding a threshold, enable the power rectifier and disable the precision rectifier.

An apparatus and method of wirelessly charging a battery are disclosed. The wireless charging system may include a charge receiver, charge transmitter, and an active control sheet. The active control sheet may include a plurality of cells. The plurality of cells may be activated or deactivated according to the location of the charge receiver relative to the charge transmitter. Charging may be initiated, and electrical charge transferred, from the charge transmitter, through the activated cells on the active control sheet, and to the charge receiver.

A vehicle emits a first signal when the vehicle moves after reception of electric power from an electric power transmission device by an electric power reception device is completed and when a preparatory condition for the vehicle to move is satisfied after reception of electric power from the electric power transmission device by the electric power reception device is completed. When a charging station receives the first signal, the charging station emits a second signal notifying that a state allows charging.

A vehicle charging system having a ground assembly is provided. The system includes a first transmitting coil at a first position and is configured to move a first charging field location in a first direction and a second direction. A second transmitting coil is provided at a second position spaced apart from the first position, the second transmitting coil being configured to move a second charging field in the first direction and second direction. A controller is operably coupled to the first transmitting coil and the second transmitting coil. The controller is configured to selectively energize at least one of the first transmitting coil or the second transmitting coil in response to receiving a signal. The controller is further operable to move a position of the at least one of the first charging field and the second charging field in response to the signal.

The invention relates to a method, to a device, and to a system for determining a position of a vehicle. The method comprises the method steps: Measuring (S01) at least one first magnetic field strength of a magnetic field at one each first position (A-i) by means of a first magnetic field sensor (11) arranged on a vehicle (1); measuring (S02) at least one second magnetic field strength of the magnetic field at one each second position (B-i) by means of a second magnetic field sensor (12) arranged on the vehicle (1) at a distance from the first magnetic field sensor (11); determining (S03) position data of the vehicle (1) at least by comparing data, which are based on the measured first and second magnetic field strengths, to a predetermined magnetic field data of the magnetic field; and outputting (S04) a signal based on said position data.

Inductive power transfer with reduced electromagnetic interactions within a conductor arrangement The invention relates to a conductor arrangement (90) for an inductive power transfer, the conductor arrangement (90) comprising at least three coils (92, 94) that are arranged along a longitudinal axis (LO) and that are formed of at least one conductor, wherein the conductor arrangement (90) comprises at least two winding heads (W) that are arranged opposite to one another and in which conductor sections of each of the coils (92, 94) extend along one another as well as along the longitudinal axis (LO), wherein, within at least one of the two winding heads (W), the conductor sections of a first and second coil (92) that extend along the longitudinal axis (LO) are arranged at a first distance (D1) to one another, the first distance (D1) being equal to or larger than zero, and the conductor section of the third coil (94) that extends along the longitudinal axis (LO) is arranged at second distances (D2) to said conductor sections of the first and second coil (92) the second distances (D2) being larger than the first distance (D1). Further, the invention relates to an inductive power transfer C arrangement (100) and methods for providing conductor arrangements (90) for an inductive power transfer.

A non-contact power feeding apparatus transmits, by at least magnetic coupling, an electric power in a non-contact manner to a power reception coil from a power transmission coil. The transmission coil is electrically connected to an alternating-current power source. The non-contact power feeding apparatus outputs an electric power to a load electrically connected to the power reception coil. The non-contact power feeding apparatus includes a coupling state estimator configured to estimate a coupling state between the power transmission coil and the power reception coil. The non-contact power feeding apparatus also includes an available output power calculator configured to calculate an available output power that can be output to the load, based on a limit value of a circuit element of a power feeding circuit including the power transmission coil and the power reception coil and on the coupling state.

A road bearing for inductive coupling to an electrical connection device of an electric vehicle includes a series of primary induction coils, a bearing surface element, and a plurality of deformation features in the bearing surface element. The series of primary induction coils are interconnected to a source of electrical power and disposed in a substantially linear array below a roadway surface and within a roadway structure, and are aligned generally parallel to an alignment of the roadway. The bearing surface element is disposed above the primary induction coils, and has an upper surface that is substantially flush with the roadway surface, has a surface flatness in the range of ±1 μm per 30 mm, and a magnetic permeability in the range of 0.9 to 2. The plurality of deformation features include depressions in the upper surface of the bearing surface element, and are configured to provide friction to vehicle wheels.