An annular block of polymer comprising an inductive coupler assembly configured to fit within a groove in the shoulder of a drill pipe joint. The assembly comprises a ferrite channel arranged around the interior of the block. At least one turn of a conductive wire is deposed within the channel. The block comprises a bumper comprising jutting from the block. The block comprises internal void openings adjacent its vertical side surfaces. A void opening is disposed proximate the bumper. The block further comprises an internal gasket partially extending from the bottom surface of the block. The external portion of the gasket being formed to fit within a gasket seat in the bottom of the groove. The wire passes through the gasket as it exits the block. When the block is installed into the groove, the gasket seals the wire and the block's components from the downhole environment.

The operation of a wireless power transmission system is to be stabilized. A wireless power supply unit includes a power transmitting module and a power receiving module. The power transmitting module includes a transmission coil to send out AC power. The power receiving module includes: a reception coil to receive from the transmission coil at least a portion of the AC power; and a compensation circuit connected to the reception coil, the compensation circuit including at least one compensation element to counteract at least a part of a leakage reactance or an excitation reactance of a coil pair including the transmission coil and the reception coil.

A signal coupling device comprises a low-frequency circuit including a magnetic ring having an opening and a high-frequency circuit including a rod-shaped magnet. A first-level circuit is formed around the magnetic ring and extends between a first-level circuit input and a first-level circuit output. A second-level circuit is formed around the magnetic ring and extends between a second-level circuit input and a second-level circuit output. The high-frequency circuit includes a third-level circuit formed around the rod-shaped magnet and extends between a third-level circuit input and a third-level circuit output. A fourth-level circuit is formed around the rod-shaped magnet and extends between a fourth-level circuit input and a fourth-level circuit output. The first-level circuit output is coupled to the third-level circuit input and the second-level circuit output is coupled to the fourth-level circuit input.

A connection system for exchanging electrical signals, includes a first symmetrical connector, and a second symmetrical connector. Each symmetrical connector has at least one magnetic core provided with at least one turn. The symmetrical connectors are produced in a substrate made of insulating material so as to form a half of a coupling transformer At least one half of the coupling transformer of each connector is arranged opposite one another so as to be able to exchange a magnetic flux. The electrical signals are emitted by the first connector in the form of a magnetic flux, and the second connector generates the electrical signals on receiving the magnetic flux.

An example telemetry system includes telemetry circuitry configured to communicate with a first device and being located on a circuit board. The telemetry system includes a first bobbin, the first bobbin being located on a first side of the circuit board. The telemetry system includes a first coil, the first coil being wound on the first bobbin in a first direction. The telemetry system includes a second bobbin, the second bobbin being located on a second side of the circuit board. The telemetry system includes a second coil, the second coil being wound on a second bobbin in a second direction, the second direction being opposite the first direction. An outer loop of the first coil and an outer loop of the second coil are electrically coupled together.

An inductive coupler system comprising an annular groove formed in the shoulder of a drill pipe. The annular groove housing an annular block comprising an inductive coupler assembly molded therein comprising a magnetically conductive electrically insulating (MCEI) ferrite ring forming an annular interior channel and a conductive wire with one or more turns running along the annular interior channel. The annular block comprising a polymer comprising a volume of micron (mμ) and submicron (nm) size MCEI elements. The MCEI elements comprising Fe and Mn. The annular block comprising a planar top surface, bottom surface, and the respective surfaces being joined by inside and outside peripheral side surfaces. The outside peripheral side surface comprising a protruding bumper comprising a dimple molded therein. The annular block further comprising a gasket comprising an axial pathway through which a portion of the conductive wire passes as the conductive wire exits the annular block.

An inductive power outlet operable to transfer power to an inductive power receiver includes a driver wired to a primary inductive coil and operable to provide a driving voltage across the primary inductive coil. The primary inductive coil is configured to form an inductive couple having a characteristic resonant frequency with at least one secondary inductive coil wired to an electric load, the secondary inductive coil being associated with the inductive power receiver. The driving voltage oscillates at a transmission frequency substantially different from the characteristic resonant frequency of the inductive couple.

An inductive power transmitter is provided that includes a power transmitting coil which includes transmission circuitry coupled to the power transmitting coil. The inductive power transmitter is configured to produce an inductive power transfer (IPT) signal having an IPT power so that the power transmitting coil generates an IPT field to transfer wireless power to a power receiving coil of an inductive power receiver. The inductive power transmitter includes detection circuitry coupled to the transmission circuitry and is configured to detect one or more indications of a magnetic field strength of a leakage IPT field. The inductive power transmitter includes control circuitry configured to control the transmission circuitry while the transmission circuitry is increasing the IPT power towards a charge level sufficient to charge a battery associated with the inductive power receiver at a target charge rate.

An active decoupling device for stabilizing the impedance on an electric line in a determined band of frequency. The decoupling device of the invention is inductively coupled to the power line and comprises a transformer with a primary winding connectable to the power line, and a secondary winding closed on a burden network. In an application, the invention, is used to decouple a smart meter from variations of the load impedance.

A multi-voltage domain device includes a semiconductor layer including a first voltage domain, a second voltage domain, and an isolation region that electrically isolates the first voltage domain and the second voltage domain in a lateral direction. The isolation region includes at least one deep trench isolation barrier. A layer stack is arranged on the semiconductor layer and includes a stack insulator layer, a first coil arranged in the stack insulator layer, and a second coil arranged in the stack insulator layer and laterally separated from the first coil in the lateral direction. The first and second coils are magnetically coupled to each other in the lateral direction. The first coil includes terminals arranged vertically over the first region and are electrically coupled to the first voltage domain, and the second coil includes terminals arranged vertically over the second region and are electrically coupled to the second voltage domain.