166 results about "Transmitter coil" patented technology

Embodiments described herein are directed to a position sensor that includes a first receiver coil electrically coupled to a first multiplier to generate a first output, a second receiver coil electrically coupled to a second multiplier to generate a second output, a transmitter coil electrically coupled to an oscillator, the oscillator electrically coupled to a third multiplier to generate a third output, a phase-locked loop electrically coupled to the oscillator and the transmitter coil, a summing circuit configured to receive the first output and the second output and configured to generate a signal, a phase detector configured to receive the signal and the third output, the phase detector outputting a sense signal that is indicative of an angle of the motor position sensor, and a pair of op amps electrically coupled to the phase detector. The op amps configured to output an analog differential signal and a differential phase signal.

This application provides a wireless power transfer system with dual voltage level output and its switching method to solve the problem that existing WPT systems cannot meet the charging needs of different voltage levels. It includes a transmitting unit and a receiving unit. The transmitting unit includes a DC power supply, a high-frequency inverter, and a transmitting coil circuit connected in sequence. The transmitting coil circuit is connected in sequence to a first transmitting coil, a first primary-side resonant capacitor, a control switch, a second primary-side resonant capacitor, and a second transmitting coil. The other ends of both the first and second transmitting coils are connected to the output terminal of the high-frequency inverter. A switching circuit is also provided between the first and second transmitting coils to cooperate with the control switch to enable the system to switch between dual voltage levels. This application achieves the switching between different voltage levels through the control of the control switch and the switching circuit, thus meeting the charging needs of different voltage levels.

A system comprising a hearing device and a charging device is disclosed. The charging device is configured for accommodating the hearing device and is further configured for inductively charging the hearing device. The hearing device comprises a rechargeable battery arranged in connection with a receiver coil. The receiver coil is arranged in a hearing device housing. The receiver coil comprises a magnetic core and a metal winding wound around the magnetic core. The charging device comprises at least one transmitter coil arranged in a charging device housing. The transmitter coil comprising the metal winding is configured for charging the hearing device. When the hearing device is accommodated in the charging device, the transmitter coil is arranged to at least partially enclose the receiver coil.

This application relates to the field of electronic circuit technology, and in particular to a wireless charging and discharging circuit, chip, and electronic device. The wireless charging and discharging circuit includes: a charging receiving coil, a charging transmitting coil, a first resonant compensation circuit, a second resonant compensation circuit, a first isolating switch, a second isolating switch, a first bootstrap circuit, a second bootstrap circuit, and a charging control chip. The first end of the charging transmitting coil is connected to the first control pin of the charging control chip, and the first end of the charging receiving coil is also connected to the first control pin of the charging control chip. The wireless charging and discharging circuit provided in this application replaces the two wireless charging chips in related technologies with a structure consisting of a charging receiving coil, a charging transmitting coil, and a charging control chip, enabling wireless charging of electronic devices and reverse wireless charging of styluses, thus saving on hardware costs.

The invention relates to an inductive position sensor device (5) for detecting the position of a coupling element, which can be arranged on a movable actuator element of an electric machine (2), having at least one transmitter coil (8, 8') for generating electromagnetic waves, at least one receiver coil (9, 9') for detecting electromagnetic waves generated by the transmitter coil (8) and influenced by the actuator element, and a computing unit (11) for operating the transmitter coil (8) and evaluating the electromagnetic waves detected by the receiver coil (9, 9') in order to determine the position, the coils (8, 9) being arranged on the front side of a common circuit board (6) and the computing unit (11) being arranged on the back side, the coils (8, 8', 9, 9') and the computing unit (11) being electrically connected by connection lines (12, 13) which extend along the circuit board (6) and through the circuit board (6). It is provided that the connection lines (12, 13) are essentially parallel to one another.

This invention discloses a Litzized magnetic negative metamaterial structure and design method, relating to the field of wireless power transmission in implantable devices. The structure consists of three square printed circuit boards (PCBs), arranged from top to bottom as a top-layer metal spiral, a middle-layer metal spiral, and a surface-mount capacitor. The top and middle layers are connected by vias, with multiple parallel metal spirals wound sequentially from the inside out in an alternating manner to achieve planar Litzized wiring, reducing AC losses. The bottom layer connects the two ends of the metal coil to the surface-mount capacitor through vias, used to adjust the operating frequency and permeability. A Litzized magnetic negative metamaterial design method is also proposed, including S1: presetting the basic parameters of the receiving and transmitting coils and the metamaterial; S2: optimizing the optimal number of turns; S3: selecting a relatively optimal range of strand counts; and S4: optimizing the number of split strands. This application provides a Litzized magnetic negative metamaterial structure and design method for implantable devices that can effectively reduce metamaterial AC losses and improve magnetic focusing capabilities.

The application discloses a coil layout optimization and pose estimation simulation model, relates to the technical fields of electromagnetic tracking, simulation modeling and electromagnetic layout optimization, and aims to realize optimal design of a transmitting coil spatial layout and high-precision pose calculation through high-fidelity numerical simulation data driving. Under the driving of specific excitation signals, a simulation engine utilizes ANSYS finite element analysis to pre-construct a global magnetic field fingerprint characteristic map of the transmitting coil, so as to replace a traditional magnetic dipole mathematical approximation model. In order to improve the scientificity of the coil layout, virtual magnetic field data generated by ANSYS is mapped into sensor sensing voltage prediction values, and residual errors are constructed with pose estimation values output by a calculation module; subsequently, the pose errors are used as feedback evaluation indexes to iteratively correct coil geometric arrangement parameters in the ANSYS model, and finally, a global optimal layout is obtained.

An experimental device for improving electromagnetic energy conversion efficiency based on LCR circuit, comprising: a signal generator, a transmitting end module, a receiving end module, a signal acquisition circuit and a digital oscilloscope; the transmitting end module comprises a primary side part of LCC-S type compensation circuit and a square ring planar disc type transmitting coil; the receiving end module comprises a square ring planar disc type receiving coil, a secondary side part of LCC-S type compensation circuit and a rectification filtering circuit; the output end of the signal generator is connected with the LCC-S type compensation circuit; the signal acquisition circuit is connected to the output end of the rectification filtering circuit; the probe of the digital oscilloscope is connected to both ends of the transmitting coil; the power supply is turned on, and the signal generator is set to output an alternating current signal with a specific frequency and voltage; the signal is driven to generate a magnetic field after being conditioned by the LCC-S compensation circuit; the receiving coil induces a voltage, and outputs a direct current after rectification filtering; the input voltage value is read by the digital oscilloscope, and the output voltage value is read by the signal acquisition circuit; the structure is simple, and the energy conversion efficiency effect is remarkable.

Embodiments described herein are directed to a position sensor that includes a first receiver coil electrically coupled to a first multiplier to generate a first output, a second receiver coil electrically coupled to a second multiplier to generate a second output, a transmitter coil electrically coupled to an oscillator, the oscillator electrically coupled to a third multiplier to generate a third output, a phase-locked loop electrically coupled to the oscillator and the transmitter coil, a summing circuit configured to receive the first output and the second output and configured to generate a signal, a phase detector configured to receive the signal and the third output, the phase detector outputting a sense signal that is indicative of an angle of the motor position sensor, and a pair of op amps electrically coupled to the phase detector. The op amps configured to output an analog differential signal and a differential phase signal.

The application belongs to the field of electric energy transmission, and discloses a position detection device and a mobile wireless electric energy transmission system. The position detection device comprises a detection transmitting coil, a detection receiving coil, a direct-current alternating-current converter, an alternating-current direct-current converter and a voltage detector. The first output end of the direct-current alternating-current converter is connected with the first end of the detection transmitting coil, and the second output end is connected with the second end of the detection transmitting coil. The first end of the detection receiving coil is connected with the first input end of the alternating-current direct-current converter, and the second end of the detection receiving coil is connected with the second input end of the alternating-current direct-current converter. The output end of the alternating-current direct-current converter is connected with the voltage detector. The mobile wireless electric energy transmission system comprises a switching controller, an energy receiving coil, an energy receiving control circuit, a plurality of energy transmitting coils, an energy transmitting control circuit and a plurality of position detection devices. The position detection device can realize accurate detection of the position of a mobile terminal, and effectively improve the accuracy and reliability of the mobile wireless electric energy transmission system.

The application provides a wireless charging coil type and mutual inductance identification method, establishes a circular transmitting coil and a circular receiving coil model, a square transmitting coil and a square receiving coil model, a circular transmitting coil and a square receiving coil model, a square transmitting coil and a circular receiving coil model, obtains a magnetic field cloud atlas and mutual inductance values of the receiving coil and the transmitting coil, and constructs a training data set; taking pixel values of the coil magnetic field cloud atlas as input and taking the coil type as output, a coil type identification model is constructed; taking the pixel values of the coil magnetic field cloud atlas as input and taking the transmitting coil and the receiving coil as output, a coil mutual inductance identification model is constructed; a loss function is set, and the coil type identification model and the coil mutual inductance identification model are trained, so as to identify the wireless charging coil type and mutual inductance. The application realizes identification of the wireless charging coil type and mutual inductance, and provides a new idea for wireless power transmission method research and engineering application.

A power transmitter (20) includes a power-transmitter control unit (70) and power-transmitter communication coils (40a to 40d). A power receiver (100) includes a power-receiver communication coil (170) and a power-receiver control unit (230). The power-transmitter communication coils (40a to 40d) are arranged such that at least a part of each receivable range is different. The power-receiver control unit divides vehicle-side information into multiple pieces, includes each piece in separate communication frames, and transmits the communication frames via the power-receiver communication coil at different timings. The power-transmitter control unit receives the communication frames via the power-transmitter communication coils, respectively, receives the vehicle-side information from the received communication frames, and controls energization of a power transmitter coil (22) based on the vehicle-side information. Accordingly, necessary information can be transmitted.

A power-transmitter control unit (70) of a power transmitter device (20) calculates an intensity of a power supply request signal based on an output signal of a power-transmitter communication coil (40), and energizes the power transmitter coil (22) when determining that the calculated intensity exceeds a determination threshold. The power transmitter device (20) includes a detection circuit (91) that measures background noise near the power transmitter coil (22). When the measured background noise is large, the power-transmitter control unit (70) sets the determination threshold to a larger value than the determination threshold when the background noise is small. When the measured background noise is large, the power-receiver control unit (230) of the power receiver device (100) sets the intensity of the power supply request signal to be larger than the intensity when the background noise is small.

An object, for an endoscope apparatus having a non-contact type connector, is to provide an endoscope apparatus that allows downsizing the connector and maintaining a stable coupling state. The endoscope apparatus includes an endoscope and a processor. The endoscope includes a connector. The processor includes a slot into which the connector is inserted. The processor is coupled to the endoscope. The slot has a first length in a width direction intersecting with an insertion direction in which the connector is inserted and has a second length larger than the first length in the insertion direction. The slot includes a transmission coil for transmitting electric power on a side surface of the slot. The connector includes a reception coil that receives the electric power from the transmission coil on a side surface of the connector.

This invention provides a rotary coupling mechanism for wireless power supply of satellite SADA (Supervisory Automation) systems, comprising a power transmitter and a power receiver. The power transmitter includes a power transmitting circuit and a transmitting coil, while the power receiver includes a power receiving circuit and a receiving coil. The power transmitting circuit is connected to a solar panel, and the power receiving circuit is connected to satellite electrical equipment. The transmitting coil is wound on the outer wall of the inner cylinder, and the receiving coil is wound on the inner wall of the outer cylinder. Both the outer and inner cylinders are made of metal. A signal transmitting circuit is connected to the outer cylinder, and a signal receiving circuit is connected to the inner cylinder. When the inner and outer cylinders are nested, the transmitting and receiving coils face each other, forming a magnetic field coupling to achieve wireless power transmission. Parts of the inner and outer cylinder walls face each other, forming an electric field coupling to achieve wireless signal transmission. Its advantages are: it meets the requirements for energy and signal transmission, has a simple structure, is easy to install, and effectively avoids many problems caused by friction and wear in slip ring structures.

The application relates to a wireless power transmission frequency adaptive regulation method based on a PT symmetry condition, which comprises the following steps: determining the topological structure of a wireless power transmission system, the system comprising a transmitting end and a receiving end, the transmitting end comprising a transmitting coil and a series resonant capacitor, the receiving end comprising a receiving coil, a parallel resonant capacitor and a load, and the parallel resonant capacitor being connected in series with an external inductance; obtaining the coupling coefficient between the transmitting end and the receiving end; determining a critical coupling coefficient according to system parameters; judging whether the coupling coefficient is greater than the critical coupling coefficient, if yes, the PT symmetry condition is met, and energy transmission is carried out, if not, the external inductance is adjusted until the coupling coefficient is greater than the critical coupling coefficient, at this time, the PT symmetry condition is met, and energy transmission is carried out. The application can maintain the stability of power and efficiency when the coupling coefficient changes, and significantly improves the robustness of the system.

A wireless charging for charging a battery by controlling a PFC circuit, a DC-DC converter, and an IPT device sequentially connected, includes: a battery charging controller configured to receive a battery voltage value and a current value of the battery, which are sensed through a battery voltage and current sensor, and generate a charging control signal based on the received voltage value and current value; a PFC controller configured to control switching operations of the PFC so as to adjust a direct-current bus voltage supplied to the DC-DC converter based on the charging control signal, and output a converter operation enable signal; and a converter controller configured to control switching of the DC-DC converter based on the converter operation enable signal and the charging control signal, thereby guaranteeing stable and efficient battery charging regardless of positional errors and matching variations between the transmission and reception coils.

The invention relates to an electromechanical fastening and unfastening mechanism operable through electromagnetic induction, direct electrical connection, or manual engagement. The mechanism comprises a cylindrical body having spiralling protrusions that enable axial displacement upon rotation, and a screw head including a central head fixed to the body and a rotatable outer ring supported by a bearing. The outer ring houses an electromagnetic receiving coil configured to receive energy from a transmitting coil of a specialized screwdriver. A motor located in the central head converts the received electrical energy into rotational motion to tighten or loosen the screw. The screw further includes tool-engagement grooves for optional manual operation. The system also supports direct wired activation and may operate multiple screws simultaneously when placed within an electromagnetic field. Certain embodiments include an internal battery and control circuitry for remote operation.

The present application belongs to the field of exploration geophysics, and particularly relates to a transient electromagnetic perspective detection method for water-bearing area in a coal mining face. Measurement points are arranged in two roadways of the coal mining face. A transmitting wire frame is fixed at a first point of a transmitting roadway for transmission, and a receiving wire frame receives at different positions in a certain range of the opposite roadway. The transmitter and the receiver are consistent in time and can synchronously collect. After the first point transmits, the transmitting coil is moved to a next position for transmission at a second point. Similarly, the receiving coil can receive in a certain range of the opposite roadway. After the second point transmits, the third point transmits, and so on until the transmission of the whole roadway is completed. The transmitting roadway and the receiving roadway are exchanged, and the above steps are repeated until the whole face is detected, and then inversion calculation is performed. The present application can solve the problems of low positioning accuracy of water-bearing abnormal body and inaccurate abnormal shape discrimination of the existing mine transient electromagnetic method.

In one example, an apparatus includes an ablation energy generator to conduct ablative energy to an electrode of a catheter, a processor configured to compute a first force signal acting on tissue by a distal end assembly of the catheter based on a first magnetic signal received by a first magnetic field sensor of the distal end assembly from a magnetic transmitter coil of a distal end of the catheter during ablation of tissue by the electrode, compute a second force signal acting on tissue by the distal end assembly based on a second magnetic signal received by a second magnetic field sensor of the distal end assembly from a magnetic transmitter coil disposed in a location pad, compute a third force signal based on the first and second force signal, and render to a display a force value or an ablation index value computed from the third force signal.

This invention discloses a three-dimensional angle-resistant wireless charging device and method, belonging to the field of wireless charging technology. The device includes first to sixth transmitting coils and first to third receiving coils. The six transmitting coils form a cubic spatial structure, with the first and second transmitting coils facing each other and serving as the front and back faces of the cubic space; the third and fourth transmitting coils facing each other and serving as the left and right faces of the cubic space; and the fifth and sixth transmitting coils facing each other and serving as the top and bottom faces of the cubic space. The three receiving coils form a sphere located at the center of the cubic space. This invention achieves omnidirectional, dead-angle-free magnetic field energy radiation.

This application relates to the field of home appliance technology and discloses an electronic device comprising: a first wearable device and a charging device. The first wearable device includes a first housing and a first charging receiving component. The first charging receiving component includes a first charging receiving coil and a second charging receiving coil. The charging device includes a base and a first charging transmitting component. The base has a first annular charging cavity inside. The first charging transmitting component includes a first charging transmitting coil and a second charging transmitting coil. At least a portion of the first charging transmitting coil overlaps with the first charging receiving coil in the circumferential direction of the first housing, and / or at least a portion of the second charging transmitting coil overlaps with the second charging receiving coil in the circumferential direction of the first housing. This application eliminates the need for alignment of the wearable device and the charging device using protrusions and recesses, facilitating charging and improving the user experience.

An apparatus for multiphoton parallel transmission for magnetic resonance imaging (MRI) of a subject, includes a radio frequency (RF) transmit coil, a single-channel universal excitation coil positioned outside of the RF transmit coil, and a processor device coupled to the RF transmit coil and the single-channel universal excitation coil. The RF transmit coil is configured to perform at least one RF excitation pulse of a multiphoton parallel transmit excitation comprising a multiphoton excitation pulse configured to correct spatial inhomogeneities and the single-channel universal excitation coil is configured to perform a low-frequency excitation pulse of the multiphoton excitation pulse. The processor device is configured to control current waveforms provided to the RF transmit coil to perform the at least one RF excitation pulse and to control current waveforms provided to the single-channel universal coil to perform the low frequency excitation pulse of the multiphoton excitation pulse.

A power transmitter (101) provides wireless power transmission to a power receiver (105) via a wirelessly inductive power transmission signal. The power transmitter (101) includes a transmitter coil (203) for generating the power transmission signal and a driver (201) for generating a drive signal for this purpose. A communicator (207) communicates with the power receiver (105) via a communication channel that does not use the power transmission signal as a communication carrier. A power loop controller (205) implements a power control loop by adjusting the power level of the power transmission signal in response to a power control error message received from the power receiver (105). A generator (209) introduces a power level change sequence into the power transmission signal, and a validity detector (211) detects data received by the communicator (207) as invalid data for power transmission in response to a comparison of the power level change sequence and the power change request of the power control error message.

This utility model relates to a wireless charging device, including a housing with a cavity inside. A battery, a transmitting coil, and a cooling component are disposed within the cavity. The transmitting coil and the cooling component are electrically connected to the battery. The housing has a length direction, a width direction, and a thickness direction. The transmitting coil is located on the side of the battery in the thickness direction. A temperature-conducting component is disposed between the battery and the transmitting coil, and is thermally connected to the transmitting coil. A portion of the temperature-conducting component projected along the thickness direction is located inside the battery, and a portion extends beyond the outline edge of the battery to form an extension. The extension, the battery, and the inner wall of the housing enclose a cooling cavity. The cooling component is disposed within the cooling cavity, and its cold end is thermally connected to the temperature-conducting component. This utility model can achieve better cooling of the transmitting coil, avoiding excessively high surface temperatures of electronic devices during wireless charging.

A wireless power transfer device includes power transmitting coils, first search coils, second search coils, and a position detection device. The position detection device outputs a pulse signal to the first search coils and the second search coils and receives an echo signal from a power-transferred device via the first search coils and the second search coils. The position detection device detects a position of a power receiving coil of the power-transferred device placed on a charging surface based on detection voltages of the echo signal in the first and second search coils. The position detection device sets, as deactivated coils, first and second search coils that are positioned within a range of a predetermined distance from the position of the power receiving coil when power is being transferred via any of the power transmitting coils to the power receiving coil.

A detection system for detecting EAS marker shielding material, the system including a transceiver configured to generate an interrogation signal. A base includes a transmitter coil and a receiver coil coupled to the transceiver. The transmitter coil generates an electromagnetic field within a detection area based on the interrogation signal. The receiver coil detects the electromagnetic field, which induces a response signal in the receiver coil. The response signal is sent to the transceiver. The response signal varies in response to an interference of the electromagnetic field, which indicates a presence of an EAS marker shield passing through the detection area.

The invention discloses a wireless charging system which comprises a transmitting end and a receiving end. The transmitting end is provided with a power supply circuit comprising a power supply unit, a transmitting end working circuit and a transmitting coil; the receiving end is provided with a charging circuit comprising a receiving coil, a receiving end working circuit and a battery; the two groups of saturable inductors are reversely connected in series; the two groups of saturable inductors which are reversely connected in series are divided into a first side and a second side, the first side forms a receiving coil, and the second side is connected in series with a control switch and connected to a charging circuit before a battery; the control switch is a normally open switch and monitors a charging voltage value of the charging circuit before the input port of the battery; the transmitting end working circuit is provided with a first signal transmitter for transmitting a first signal to the control switch; the control switch is provided with a first signal receiver for receiving a first signal; the control switch is switched on under the following two conditions: when the charging voltage value exceeds the preset voltage value; the first signal is received. The circuit protection circuit has a good circuit protection function.

The application discloses a power supply circuit and a power supply chip, which are applied to a wireless power transmitting end, and the wireless power transmitting end comprises an H-bridge circuit and a transmitting coil. The power supply circuit comprises a power input end, a switching node, a voltage output end, a low-voltage-difference linear voltage stabilizing module, a switching conversion control module, a first power tube, a second power tube and a main controller. The main controller is used for performing object detection and object identification through the H-bridge circuit and the transmitting coil, and controlling the switching conversion control module to work in a prohibited state, a step-down working state or a step-up working state according to an input voltage state and an object detection result. In the above manner, the application can adapt to various input voltage scenes, adopts low-voltage-difference linear voltage stabilizing power supply in a low-voltage-difference scene to simplify a peripheral circuit, adopts step-down conversion in a high-voltage-difference scene to reduce power consumption and heat generation, and adopts step-up conversion in a low-voltage battery scene to realize self-waking up and receiving end identification functions.