2008 results about "Transmitter coil" patented technology

A modular power transmitting system comprises multiple transmitter modules being connected together for transmitting power inductively to a receiver. The transmitter module is connected with other transmitter modules for transmitting power inductively to the receiver, wherein the transmitter module (40) comprises at least one transmitter cell (30), each transmitter cell having one transmitter coil (33) by which the transmitter cell transmitting power to the receiver, the transmitter module having an outer periphery (45) being shaped so as to fit to neighboring transmitter modules for forming an power transmitting surface, the at least one transmitter cell being arranged such that the power transmitting surface is constituted by an uninterrupted pattern of adjacent transmitter coils extending in said surface, and interconnection units (110,111) for connecting with neighboring transmitter modules for sharing a power supply.

Disclosed is a noncontact electric power transmission system having a power transmitter circuit section 10 and a power receiver circuit section 30 which are adapted to be coupled to transmit electric power from a transmitter coil Lp provided in the power transmitter circuit section 10 to a receiver coil Ls provided in the power receiver circuit section 30, in a noncontact manner by means of electromagnetic induction. The noncontact electric power transmission system comprises: a separately-excited or self-excited switching circuit 2 provided in the power transmitter circuit section 10; a control IC 3 operable to drive the switching circuit 2; an LC series resonant circuit including a capacitor Cp connected in series to the transmitter coil Lp or an LC parallel resonant circuit including a capacitor Cp connected in parallel to the transmitter coil Lp; and an LC parallel resonant circuit including a capacitor Cs connected in parallel to the receiver coil Ls, wherein an oscillating frequency (Fosc) of the control IC 3, a resonant frequency (Fpr) of the LC series resonant circuit or the LC parallel resonant circuit in the power transmitter circuit section 10, and a resonant frequency (Fsr) of the LC parallel resonant circuit in the power receiver circuit section 30, have the following relationship: Fpr<Fosc<Fsr.

Embodiments of the subject invention relate to a method and apparatus for determining information regarding a load in a planar wireless power transfer system by extracting system operating parameters from one or more test points in the transmitter circuit. As shown in FIG. 1, a specific embodiment showing three test points in the transmitter circuit from which operating parameters can be extracted. The transmitter circuit is designed to produce a magnetic field, by driving the transmitter coil, which inductively couples to a receiver coil such that power is provided to a receiver. By extracting operating parameters from the transmitter circuit, the receiver does not need to incorporate sophisticated signal processing and can be manufactured with low cost.

An electromagnetic imaging method for electromagnetically measuring physical parameters of a pipe CJ, CC by means of a plurality of measuring arrangement ZMA, MCMA, MonMa, ImMA comprising a plurality of transmitter coil ZTX, LFTX, DTX and a plurality of receiver coil ZRX1, ZR2, MRX, MC, PRX1, PRX2, PRX3, PRX4, PRX5, PRX6, PRX7, PRX8, PRX9, PRX10, PRX11, PRX12, PRX13, PRX14, PRX15, PRX16, PRX17, PRX18, the transmitter coils and receiver coils being associated so as to form the plurality of measuring arrangement, the plurality of measuring arrangement being adapted to be positioned into the pipe and displaced through the pipe, the physical parameters being measured for a plurality of position along the pipe, the method comprising the steps of:

• a) determining a first value of an average ratio of magnetic permeability to electrical conductivity and a first value of an average inner diameter of the pipe Z-MES,
• b) determining an average electromagnetic thickness of the pipe MC-MES,
• c) determining a second value of the average ratio of magnetic permeability to electrical conductivity and a second value of the average inner diameter of the pipe Mon-MES according to excitation frequencies which are substantially lower than the excitation frequencies used to determine the first values Z-MES,
• d) determining a first image EMTIM of the pipe electromagnetic thickness and the pipe defects Im-MES,
• e) discriminating the defects at an inside perimeter of the pipe from the defects at an outside perimeter of the pipe Dis-MES, and
• f) forming a corrected first image IOFIM of the pipe taking into account a position of the defects.

An improved wireless transmission system for transferring power over a distance. The system includes a transmitter generating a magnetic field and a receiver for inducing a voltage in response to the magnetic field. In some embodiments, the transmitter can include a plurality of transmitter resonators configured to transmit wireless power to the receiver. The transmitter resonators can be disposed on a flexible substrate adapted to conform to a patient. In one embodiment, the polarities of magnetic flux received by the receiver can be measured and communicated to the transmitter, which can adjust polarities of the transmitter resonators to optimize power transfer. Methods of use are also provided.

An inductive power transfer system comprises a transmitter coil TX and a receiver coil RX spaced from the transmitter coil. A transmitter circuit comprises the transmitter coil and is in the form of a Class E amplifier with a first inductor U_choke and a transistor in series between the terminals of a power supply, a first transmitter capacitor C_par in parallel with the transistor between the first inductor and a power supply terminal, a primary tank circuit in parallel with the first transmitter capacitor, the primary tank circuit comprising the transmitter coil and a second transmitter capacitor C_res arranged in parallel with the transmitter coil, and a third transmitter capacitor C_ser in series with the first inductor between the first transmitter capacitor and the primary tank circuit. The transistor is arranged to switch at a first frequency ω_d and the capacitance of the second transmitter capacitor is selected such that the resonant frequency ω_OTX of the primary tank circuit is greater than the first frequency. The receiver circuit comprises a Class E rectifier having a first receiver capacitor C_L arranged in parallel with a load R_L and a secondary tank circuit in parallel with the first receiver capacitor. The secondary tank circuit comprises the receiver coil and a second receiver capacitor C_res arranged in parallel or series with the receiver coil. A first diode D_r2 is provided between the secondary tank circuit and the first receiver capacitor. The capacitance of the second receiver capacitor is selected such that the resonant frequency ω_oRX of the secondary tank circuit differs from the first frequency, so that the secondary tank circuit operates in semi-resonance and maintains some reactive impedance. The transmitter circuit is configured to vary the first frequency, in order to achieve a desired impedance of the primary tank circuit.

An exemplary inductive power transfer system having a transmitter coil and a receiver coil. A transmitter-side power converter having a mains rectifier stage powering a transmitter-side dc-bus and controlling a transmitter-side dc-bus voltage U_1,dc. A transmitter-side inverter stage with a switching frequency f_sw supplies the transmitter coil with an alternating current. A receiver-side power converter having a receiver-side rectifier stage that rectifies a voltage induced in the receiver coil and powering a receiver-side dc-bus and a receiver-side charging converter controlling a receiver-side dc-bus voltage U_2,dc. Power controllers that determine from a power transfer efficiency of the power transfer, reference values U_1,dc*, U_2,dc* for the transmitter and receiver side dc-bus voltages. An inverter stage switching controller controls the switching frequency f_sw to reduce losses in the transmitter-side inverter stage.

An implantable component (30) of a cochlear implant system comprising a housing for a stimulator unit (31) that is adapted to output one or more stimulation signals and an electrode assembly (30) adapted to apply electrical stimulation in accordance with the output of the stimulator unit (31). On implantation, the housing is positionable such that the electrode assembly (20) extends from the housing at least initially in a downward orientation toward the mastoid cavity before entering the cochlea. An external component (50, 60 or 70) of a cochlear implant system comprising a support for mounting to the ear of an recipient and an external signal transmitter coil (53) wherein the signal transmitter coil (53) is movably mounted to at least a portion of the support.

A planar sensor array for use in a surgical navigation system comprising at least one substrate and at two layers of a plurality of planar sensor coils formed on or within the at least one insulating substrate. The planar sensor array may be an electromagnetic planar transmitter coil array or an electromagnetic planar receiver coil array that includes at two layers of a plurality of planar electromagnetic transmitter or receiver spiral-shaped coils formed on or within the at least one substrate. The surgical navigation system includes the use of at least one magnetoresistance reference sensor attached to a fixed object; at least one magnetoresistance sensor attached to an object being tracked; and a planar sensor coil array communicating with the at least one magnetoresistance reference sensor and the at least one magnetoresistance sensor to determine the position and orientation of the object being tracked.

A wireless charging device comprising a base assembly having at least one first base terminal for input of electrical power and at least one second base terminal placed on a second base terminal housing of the base assembly for output of the electrical power and a head assembly detachably attached to the base assembly, the head assembly having at least one head terminal for input of the electrical power, at least one transmitter coil for transmitting the electrical power through inductive coupling to a receiver coil of a receiver mounted on at least one mobile device, the at least one mobile device detachably placed on a head cover of the head assembly, a magnet for facilitating attachment of the at least one mobile device to the head cover wherein the head assembly is attachable to a plurality of said base assemblies.

A wireless power transfer system including a driver coil array, a hexagonally-packed transmitter mat, a receiver coil, and a load coil for powering a medical implant. The magnetically coupled resonance between two isolated parts is established by an array of primary coils and a single small secondary coil to create a transcutaneous power link for implanted devices as moving targets. The primary isolated part includes a driver coil array magnetically coupled to a mat of hexagonally packed primary coils. Power is injected by the driver coils into the transmitter coils in the transmitter mat to maintain resonance in the presence of losses and power drawn by the receiver coil from the magnetic field. The implanted secondary isolated part includes a receiver coil magnetically coupled to a load coil. A rectification/filter system is connected to the load coil supplying DC power to the electronic circuits of the implant.

The invention discloses an electromagnetic inductive type non-contact charging system and an aligning method thereof. The system comprises a ground electric energy emitting device and a vehicle-mounted electric energy receiving device, wherein the vehicle-mounted electric energy receiving device comprises a display module, a vehicle-mounted part controller, a vehicle-mounted wireless communication module, a vehicle-mounted electric energy receiving module, a battery and a vehicle-mounted receiving coil, and is arranged on a vehicle, the vehicle-mounted receiving coil is arranged below a chassis, the ground electric energy emitting device comprises a ground emitting coil, a ground electric energy emitting circuit, a driving module, a ground part controller and a ground wireless communication module, and is arranged on the ground, and the ground emitting coil is arranged on the top of the ground electric energy emitting device. On the basis of the traditional non-contact charging, a positioning aligning device taking the charging efficiency as the control target is added, so that an automatic optimizing function for the charging efficiency is realized; the system and the method are simple and easy to implement, and whether the current situation is suitable for charging or not can be judged only by monitoring the charging efficiency.

An inductive coil arrangement is described for an ear canal of a recipient patient. An inner transmitter coil inserts into the ear canal for transmitting a communication signal through the skin of the outer wall of the ear canal. The transmitter coil includes transmission wire loops that lie substantially in a common plane which curves around the central axis of the ear canal conformal to the outer wall of the ear canal. An outer receiver coil is implantable under the skin of the outer wall of the ear canal for receiving the communication signal from the transmitter coil. The receiver coil includes receiver wire loops that lie substantially in a common plane which curves around the central axis of the ear canal substantially parallel to the transmitter coil.

A method for docking an autonomous mobile floor cleaning robot with a charging dock, the robot including a receiver coil and a structured light sensor, the charging dock including a docking bay and a transmitter coil, includes: positioning the robot in a prescribed docked position in the docking bay using the structured light sensor and by sensing a magnetic field emanating from the transmitter coil; and thereafter induction charging the robot using the receiver coil and the transmitter coil with the robot in the docked position.

A wireless magnetic through-hull communications apparatus and method which permit higher data-rate communications through materials than presently available using acoustic techniques is described. A signal source on one side of a barrier is directed into a coil driver which generates an amplified, modulated signal responsive thereto. The resulting signal is used to drive a transmitter coil which generates a time-varying magnetic field that penetrates the barrier as well as any gaps comprising water, air or other material between the barrier and the transmitter coil. On the other side of the barrier, and perhaps through additional gaps comprising water, air or other material, a receiver coil detects the time-varying magnetic field. This signal may be amplified and then digitized by a signal processor. The signal processor may then communicate with a data processing and/or display unit, another sensor or some other device. Electric power may also be transmitted through the barrier for providing power to instrumentation without the need for batteries.

The present invention has an object to provide an electronic circuit capable of efficiently transmitting signals in a case where signals are transmitted over substrates with three or more substrates three-dimensionally mounted. In the present invention, LSI chips are stacked in three layers, and a bus is formed over three chips. The first through the third transmitter coils 13a, 13b, 13c and the first through the third receiver coils 15a, 15b, 15c are formed by wiring on the first through the third LSI chips 11a, 11b, 11c. These three pairs of transmitter and receiver coils are disposed so that the centers of the openings thereof are coincident with each other, whereby three pairs of transmitter and receiver coils 13 and 15 form inductive coupling to enable communications. The first through the third transmitter circuits 12a, 12b, 12c are connected to the first through the third transmitter coils 13a, 13b and 13c, respectively, and the first through the third receiver circuits 14a, 14b, 14c are connected to the first through the third receiver coils 15a, 15b, 15c, respectively.

An implantable biocompatible sensor unit includes a sensor body of a biocompatible material configured for in vivo placement proximate a tumor treatment site. The sensor body includes at least one sensor element are configured to provide data corresponding to treatment of the tumor treatment site. The sensor body further includes a transmitter coil and associated electronic components configured for wireless transmittal of the data to a spatially remote receiver. In addition, the sensor body includes a high-atomic weight member that is configured to be detectable by an imaging modality. The sensor unit is configured to be inductively powered to wirelessly transmit the data to the remote receiver while remaining implanted proximate the tumor treatment site. Related medical systems and methods of operation are also discussed.

Certain embodiments of the present invention provide a transformer-coupled guidewire system and method. Certain embodiments include a transmitter coil positioned in a distal end of a guidewire, a pickup coil positioned at a proximal end of the guidewire, and a first winding coiled apart from the guidewire. The guidewire is positioned with respect to the first winding such that the first winding is inductively coupled to the pickup coil to form a transformer providing power to the transmitter coil. The guidewire may include a catheter or a catheter may be positioned over the guidewire, for example. In an embodiment, the pickup coil serves as a secondary winding to form a transformer using the first winding and the pickup coil. The first winding may be coiled around a core, for example. The core may include an air gap longer than a length of the pickup coil, for example.

The disclosure relates to systems and methods for controlling a wireless power transfer system based upon Inductive Charging Technology using frequency based signaling communication protocol, operable to function in modes of Standby, Digital Ping, Identification, Power Transfer and End of Charge (EOC). The power transfer system comprising at least one wireless power outlet associated with a wireless power transmitter coil and at least one electrical device associated with a wireless power receiver coil, where the wireless power receiver coil is in multi-directional communication with the wireless power transmission of a message transmitter coil. The amount of power transferred is controlled by feedback communication between the receiver and the transmitter configured to increase or NO decrease power. More specifically, the present disclosure supports wireless power transfer incorporating transmission opportunity extended signaling supporting uni-directional and bi-directional communication enabling data transfer over extended range, higher power levels of power transfer and improved foreign object detection functionality.

A process and device for detecting electrically conductive particles in a liquid flowing in a pipe section, the liquid being exposed to periodic alternating electromagnetic fields by a transmitter coil which induces eddy currents in the particles, a probe made as a coil arrangement and which has an effective width producing a periodic electrical signal based on the eddy currents. The signal ha a carrier oscillation with an amplitude and/or phase which is modulated by particles passing across the effective width of the coil arrangement, the probe signal being filtered by a frequency-selective first filter unit, the filtered signal being sampled by a triggerable A/D converter stage to obtain a demodulated digital measurement signal, the digital measurement signal being filtered by a digital, frequency-selective adjustable second filter unit to obtain a useful signal, and the useful signal being evaluated to detect passage of electrically conductive particles in the pipe section.

An improved bulk wireless charger station may be constructed of a number of individual wireless charger modules. Each module may include an embedded wireless charger transmitter with the capability of wirelessly charging a device inserted into the module. The device may have the capability of being wirelessly charged via a wireless charging receiver in communication with the wireless charger transmitter. Charging the device may include charging a battery or other electrical storage element within the device, which, once charged, may power the device during use. The charger modules may be stackable horizontally and/or vertically to form the charger station. Each charger module may also include a power interface for receiving power from either a power base or other charger modules, and/or a communication interface for communicating with other charger modules and/or control station(s). The embedded wireless charger transmitter may be a transmitter coil controlled through a power conversion/control board.