Abstract:
An inductive power transfer apparatus (1) may be used for producing or receiving a magnetic field for inductive power transfer. The apparatus has a central coil (5) and two end coils (3,4), one of the end coils being provided at each end of the central coil (5). Some turns of each of the end coils (3,4) are on one side of the central coil (5) and the remaining turns are on the other side. The end coils act to weaken or cancel flux on one side of the central coil (5) and guide magnetic flux through the central coil to provide an arch shaped flux pattern beyond the apparatus on the other side of the central coil.
Abstract:
An inductive power transfer (IPT) pick-up circuit has a full-wave rectifier (D 1 – D 4 ) coupled to a resonant circuit (L 1 C 1 ) and adapted to rectify an AC current received from the resonant circuit. A pair of inductors (L 2 L 3 ) are provided, being arranged to couple the rectifier to an output ( V Load ) of the pick-up circuit and alternately store and release energy to the output.
Abstract:
Systems, methods and apparatus for wireless power transfer and particularly wireless power transfer to remote systems such as electric vehicles are disclosed. In one aspect an induction coil is provided comprising a plurality of substantially co-planar coils formed from one or more lengths of conducting material, each length of conducting material being electrically connectable at each end to a power source or battery, and wherein at least one of the lengths of conducting material is continuously wound around two or more of the coils. In another aspect, a method is provided for forming such an induction coil. In yet another aspect, a switching device is operable to alter the configuration of the coils, for example in response to a detected characteristic of another induction coil or device coupled thereto.
Abstract:
Foreign object detection apparatus for an IPT system (400), includes a control means (10) adapted to detect the presence of a foreign object on or adjacent to an IPT primary pad (401 ) of the system.
Abstract:
An IPT system magnetic flux device for generating or receiving a magnetic flux, has a magnetically permeable core (2) and at least one coil (4) magnetically associated with the core (2). A shield (6) repels magnetic flux and is located on the opposite side of the core (2) such that the shield (6) includes an outer portion (δA1) that extends beyond at least part of the perimeter of the core.
Abstract:
An AC processing apparatus and method for high-power inductive power transfer (IPT) applications is disclosed which includes an input means for coupling to a voltage source, a processing means for producing an output signal based directly or indirectly at least in part on the voltage of the voltage source, an output means, and a switching means for selectively coupling the processing means to the output means so as to selectively provide the output signal to the output means. Also disclosed are an IPT controller, an IPT pick-up and an IPT system each including at least one of the AC processing circuits.
Abstract:
An inductive power transfer (IPT) pad and system for the charging of electric and hybid electric vehicles. The batter of such a vehicle can be selectively coupled to a high power electrical supply for fast charging or a lower power electrical supply for charging using IPT. The batteries of the vehicles are used in a system to control the load demand in an electricity network through variations of the frequency of power supplied.
Abstract:
An Inductively Coupled Power Transfer (ICPT, or IPT) pick-up circuit is provided which includes an inductive element L 2 provided between a resonant circuit and a rectifier means. A DC inductor is not required. The inductive element L2 is chosen to have substantially the same inductance as that of the pick-up coil L 1 , reducing or eliminating the reactive component of the reflected impedance.
Abstract:
Eine Anordnung zur Versorgung eines Verbrauchers mit elektrischer Energie einer Stromquelle umfasst einen textilen, gewobenen Bodenbelag (101 ) mit längslaufenden Kettfäden und querlaufenden Schussfäden, wobei drei oder mehr beabstandete, zueinander im Wesentlichen parallele Stromleiter (106) entweder als Kettfäden oder als Schussfäden eingewoben sind, wobei die Stromleiter während des Webvorgangs einen Teil einer Füllkette, einer Bindekette oder der Schussfäden ersetzen. Die Anordnung umfasst weiter eine Einspeisung zum Anschluss der Stromleiter (106) an die Stromquelle und eine Kopplungseinrichtung (130) zur Aufnahme von elektrischer Energie aus den Stromleitern (106) im Bodenbelag (101) und zum Weitertransport an den Verbraucher, wenn die Kopplungseinrichtung (130) in einen Stromaufnahmebereich des Bodenbelags (101) gebracht wird. Die Kopplungseinrichtung (130) ist insbesondere derart ausgebildet, dass elektrische Energie induktiv aus den im Bodenbelag verlaufenden Stromleitern (106) aufgenommen werden kann. Die Versorgungsanordnung ermöglicht eine hohe Flexibilität und lässt sich gut in Räume integrieren.
Abstract:
A method is provided for controlling a resonant circuit (1) of an ICPT system. The resonant circuit has a controlled variable reactance (2), and a predetermined perturbation is introduced in the magnitude of variable reactance. The change in a property of the resonant circuit in response to the perturbation is sensed, and the variable reactance is varied to alter the resonant frequency of the circuit in response to the sensed change.