A device for inductive energy transfer between a stationary three-phase primary system and a mobile three-phase secondary system shows a stationary iron core part and two mobile iron core parts (3, 5) which are connected electrically in series are each designed as an equilateral triangle or as a star which spans an equilateral triangle and has limbs (3a, 3b, 3c; 5a, 5b, 5c) of equal length which run at the same angle in relation to one another, and supporting posts (3a, 3b, 3c; 5a, 5b, 5c) which start from the ends of said limbs, and also primary and secondary windings (4, 6) which are arranged at the same distance from one another. The device of simple design has a high degree of efficiency in respect of energy transfer. In the case of energy transfer only in the inoperative state, a stationary iron core part and a mobile iron core part can also be positioned directly one on the other without magnetic rails.

A device for inductive energy transfer between a stationary three-phase primary system and a mobile three-phase secondary system shows a stationary iron core part and two mobile iron core parts (3, 5) which are connected electrically in series are each designed as an equilateral triangle or as a star which spans an equilateral triangle and has limbs (3a, 3b, 3c; 5a, 5b, 5c) of equal length which run at the same angle in relation to one another, and supporting posts (3a, 3b, 3c; 5a, 5b, 5c) which start from the ends of said limbs, and also primary and secondary windings (4, 6) which are arranged at the same distance from one another. The device of simple design has a high degree of efficiency in respect of energy transfer. In the case of energy transfer only in the inoperative state, a stationary iron core part and a mobile iron core part can also be positioned directly one on the other without magnetic rails.

A docking station that securely holds a portable electronic device in a desired location with respect to a primary power coil for inductive charging of a battery of the portable electronic device is provided. In one embodiment the docking station includes a pair of opposed end stops spaced apart longitudinally along a base and a primary coil of an inductive charging system positioned below the base. The end stops are longitudinally adjustable to properly align a secondary coil of the portable electronic device with a primary coil. A flexible retention wall may be deflected to provide a biasing force on the portable electronic device. Walls of the end stops are generally curved toward each other and provide downward pressure to prevent vertical and horizontal movement. In another embodiment, a retainer clip is movably coupled with and selectively slides along the base to securely hold the portable electronic device.

A magnetic field distribution control apparatus includes a rod portion, a coil disposed at one side of an upper surface of the rod portion, and a ferrite movably disposed within the coil and configured to produce a magnetic field.

A magnetic field distribution control apparatus includes a rod portion, a coil disposed at one side of an upper surface of the rod portion, and a ferrite movably disposed within the coil and configured to produce a magnetic field.

A tunable resonator includes at least one tunable capacitor coupled with at least one tunable inductor. The tunable resonator includes a mechanical tuning mechanism coupled with a connecting bridge and with first and second electrodes of the tunable inductor. The mechanical tuning mechanism also moves the first and second electrodes of the tunable inductor relative to an electrode of the tunable capacitor, and providing a force down onto or to pull up a connecting bridge to tune the tunable inductor.

A single housing with a non-ferromagnetic piezo-driven flexure has primary and secondary coil forms of different diameters, one coaxially inside the other, integrated in the flexure. The cylinders defining the planes of the primary and secondaries do not spatially overlap. The secondary coil forms may be wound in opposite directions and wired to provide a transformer device. Movement of the primary relative to the secondaries in the direction of the central axis of the coils can be differentially detected with high precision.

An inductive power transfer coil assembly including: a magnetically permeable core including a base having a pair of spaced apart limbs extending therefrom; and a winding located between and above the pair of spaced apart limbs.

An inductive power transfer coil assembly including: a magnetically permeable core including a base having a pair of spaced apart limbs extending therefrom; and a winding located between and above the pair of spaced apart limbs.

The inductor core has a higher magnetic permeability than air, and includes an endless channel adapted for containing an inductor winding, where the inductor core extends along a first axis A, and the inductor winding extends completely around the first axis A of the inductor core in such a way that the inductor winding has a number of discrete positions or first sections where it extends in a direction being perpendicular to the first axis A of the inductor core, and wherein the inductor winding, between the discrete positions or first sections, has second sections where it extends at least partly along the first axis A.