153 results about "Repeating coil" patented technology

The present disclosure provides a wireless power transmitter, which is configured to transmit power to a wireless power receiver in a wireless manner. The wireless power transmitter includes a main body that is provided with a transmitting coil configured to transform a magnetic flux through a current change to transmit the wireless power, and a repeater that is provided with a repeating coil configured to receive the wireless power based on the magnetic flux transformation and transfer the received wireless power to the wireless power receiver, wherein the repeating coil faces the transmitting coil.

The invention discloses a multi-transmission-source enhanced wireless charging system. The multi-transmission-source enhanced wireless charging system comprises an energy transmission part, a relay part and an energy receiving part; the energy transmission part comprises a plurality of energy transmission sources; each energy transmission source comprises a high frequency inverter, a compensation capacitor and a primary coil with a small number of turns; the relay part is a loop which is formed by connecting a relay coil with a large number of turns with a relay circuit compensation capacitor in series; the relay coil is close to each primary coil; the energy receiving part comprises a secondary coil with a large number of turns and a rectifying and filtering circuit; an output end of the rectifying and filtering circuit is connected with two ends of a charging battery; an air gap exists between the secondary coil and the relay coil. The multi-transmission-source enhanced wireless charging system disclosed by the invention has the advantages that the output power grade of the system is enhanced, dissonance problem of the system caused by decoupling and mutual inductance between the plurality of transmission coils is avoided; neither additional compensation capacitor nor compensation transformer needs to be additionally arranged; as the energy transmission part and the relay part are mounted on the ground and the energy receiving part is mounted at the bottom of the vehicle, the system has a simple structure and has low requirements on space.

The invention discloses an asymmetric wireless power transmission system with a relay coil inserted therein, and a method, and relates to the field of a magnetically-coupled resonant wireless power transmission technology. The relay coil and an emission coil are coaxial and are disposed at the same plane. The system and the method mainly solve the problem of low transmission efficiency of a wireless power transmission system whose emission coil is larger than a receiving coil in terms of dimension over an intermediate and long distance. According to the method, through inserting the relay coil which is coaxial and disposed at the same plane with the emission coil in the system, the mutual inductance coefficient between adjacent coils is enhanced, the coupling degree between the coils is improved, the transmission efficiency of the system is improved, the coaxial and same-plane structure of the relay coil and the emission coil helps to save space dimension, and application of the wireless power transmission system in reality is better facilitated.

A portable electronic device capable of extending near field communication distance comprises a watchband portion, a power supply module, an NFC module and a relay coil group arranged in the watchband portion. The power supply module comprises a wireless charging receiving coil, a charging circuit and a charging battery. The NFC module comprises an NFC antenna and an NFC circuit. The relay coil group receives external electromagnetic wave energy and transmits the external electromagnetic wave energy to the wireless charging receiving coil, so that the charging battery is charged through the charging circuit. The relay coil group also receives an external NFC read-write signal and forwards the external NFC read-write signal to the NFC antenna, or receives NFC data or an internal NFC read-write signal sent by the NFC antenna and forwards the NFC data and the internal NFC read-write signal to other electronic devices outside the electronic device. According to the electronic device in the invention, the transmission distance of signals is extended through the magnetic resonance between coils, and the positions of the coils do not need to be corresponding completely, so that positioning-free charging and NFC are realized, and the convenience and usage efficacy of wireless charging and NFC are improved.

The invention discloses a single-relay and multi-load wireless power transmission system optimal frequency configuration method based on load power balance. The invention is characterized in that a single-relay and multi-load wireless power transmission system comprises a high frequency power supply system, a transmitting coil, a relay coil, and a plurality of receiving coils. The method comprises the steps of calculating the transmission efficiency of the single-relay and multi-load wireless power transmission system and a receiving power expression based on a load coil space distribution method, obtaining the configuration method of each frequency parameter under optimal transmission efficiency with a system working frequency and the self-resonant frequency of each coil loop as independent variables, and discussing the working frequency in a maximum receiving power and each coil loop self-resonant frequency configuration method on the basis of the optimal transmission efficiency. According to the method, the key problem of the wireless power transmission system comprising a single-relay and multi-load mode is solved, and a definite guidance is provided for the multi-load application of the wireless power transmission system in the middle and long distances.

The invention, which relates to the magnetically-coupled resonant wireless power transmission technology, provides an asymmetric wireless power transmission system and a power transmission method thereof. The system comprises a high-frequency signal generator, a power amplifier, an impedance matching network, a transmitting coil and a receiving coil. The power amplifier is connected between a high-frequency signal generator and the impedance matching network; the transmitting coil is connected between the impedance matching network and a first relay coil that is coupled with the transmitting coil and is adjacent to the transmitting coil coaxially, wherein the transmitting coil and the first relay coil have the same size; a second relay coil is coupled to the first relay coil; the receiving coil is coupled to the second relay coil and the two coils are arranged coaxially; and the receiving coil is connected to a load. The four coils are formed by silver-plated nickel-stranded copper wires, so that the coil quality factors are improved. Because the two relay coils that have the same sizes as the transmitting coil and the receiving coil and are coaxial with and adjacent to the transmitting coil and the receiving coil are used, the coefficient of mutual induction between the coils is increased and the power transmission efficiency is improved. Besides, on the basis of the equal-size adjacent design, the occupied space of the system is saved.

The embodiment of the invention discloses a wireless power supply method and device for high-voltage on-line monitoring equipment. With the method and device, a problem of low power supply reliability of the wireless power supply method of the existing high-voltage on-line monitoring equipment and problems of a power supply distance, power and efficiency, power supply stability and reliability, and power supply cost can be solved. The method comprises: step one, an energy-taking coil takes energy out from a high-voltage bus in an electro-magnetic induction manner and AC / DC and DC / AC voltage conversion is carried out to convert 50-Hz alternating currents into high-frequency alternating currents; step two, a transmitting coil disperses the energy of the high-frequency alternating currents to the surrounding space and thus a high-frequency electromagnetic field is formed in the space, targeted transmission of the energy is carried out by using a domino relay coil, and a receiving terminal receives the energy; and step three, after the receiving terminal receives the energy, power conversion processing is carried out and then the converted power is provided for a storage battery and a load.

The present invention is mainly directed to providing a wireless power relay device and a wireless power transmission system, which are capable of reinforcing a relay coil in which a high voltage is induced among a plurality of relay coils, thereby preventing the relay coil from being damaged due to the induction of the high voltage.

The invention discloses a repeating coil design method for a three coil structure middle distance wireless energy transmission system, comprising steps of setting a transmission distance for the middle distance wireless energy transmission system, calculating load power and integral efficiency of the three coil type wireless energy transmission system containing the repeating coil and maximized power or the impedance condition when the efficiency is output, establishing an efficacy integration target function with the practical power and efficiency need as optimization goals, determining a restriction condition of the middle distance wireless energy transmission system according to a practical application index, and finally determining the repeating coil optimization parameters when the optimization goal is achieved.

The invention discloses a moving-magnetic type ultrathin telephone receiver, comprising a case which is internally provided with a vibrating diaphragm, wherein the vibrating diaphragm is compounded with permanent magnet material powder, the wall of the case arranged at one side of the vibrating diaphragm is provided with a planar primary coil being taken as a primary voice coil and a damping hole, the wall of the case at the other side of the vibrating diaphragm is provided with a planar repeating coil being taken as a repeating coil and a sound hole, and a connection capable of increasing the total magnetic field is formed between the planar main coil and the planar repeating coil. The telephone receiver has the advantages of compact structure and is convenient for automatic production, besides, the vibration mode formed in the invention is better than a common cone vibration mode.

A wireless communication system may include a first coil having at least a function of transmitting signal information, a relay coil, and a second coil having at least a function of receiving the signal information, and satisfying Equation (1): RO1>RO2>RO3, where RO1 represents an outer diameter of the first coil, RO2 represents an outer diameter of the relay coil, and RO3 represents an outer diameter of the second coil, and a small portable device, a housing case for a small portable device, and a communication device for a small portable device to be used in the wireless communication system.

The invention discloses a wireless power transfer system and a power transfer method thereof, and relates to the magnetically-coupled resonant wireless power transfer technology. The wireless power transfer system comprises a high-frequency signal generator, a power amplifier, a transmitting coil and a receiving coil, wherein the power amplifier is connected between the transmitting coil and the high-frequency signal generator; a repeating coil is arranged on the inner side of the transmitting coil; the repeating coil is coupled to the transmitting coil; the repeating coil and the transmitting coil are coaxial and coplanar; the receiving coil is coupled to the repeating coil; the receiving coil is further connected with loading equipment; the transmitting coil, the repeating coil and the receiving coil are made of magnetically-plated conductors. Through arrangement of the repeating coil coaxial and coplanar with the transmitting coil, a mutual inductance coefficient between the transmitting coil and the repeating coil is greatly increased, amplification of source current is achieved, and the power transfer efficiency is improved. In addition, through coaxial and coplanar arrangement of the repeating coil and the transmitting coil, the space occupation of the wireless power transfer system can be also reduced.

The present invention belongs to the display technological field and discloses a flexible display device. The flexible display device comprises a flexible substrate and a flexible-rigid conversion layer formed on one side of the flexible substrate, wherein the flexible-rigid conversion layer comprises a conversion thin film which can undergo flexible-grid conversion under the action of an electricfield and an electrode layer which is used for forming the electric field that drives the change of the conversion thin film. The elastic parameter of the conversion thin film of the flexible displaydevice provided by the invention can be switched under the action of the electric field, the conversion thin film can be switched to a rigid layer from a flexible layer, and therefore, the flatteningof the flexible substrate can be realized; and on the basis of the conversion of the conversion thin film, damage to the flexible substrate during a process of a plurality of times of repeated coiling and unfolding can be decreased, the service life of the display device can be prolonged, and the display quality of the display device can be improved.

The present invention relates to a load measuring transducer including gauges and elastic structure and weighing system for measuring weight applied to a structure. The load measuring transducer of the present invention comprises a stationary gauge which is constructed of a plurality of repeated coil (or electric wire) patterns with a predetermined pitch and has both ends to which an AC electricity is applied; and a moving gauge which is provided to move in a longitudinal direction (or perpendicular direction with respect to the longitudinal direction) of the stationary gauge without contact therewith in response to the occurrence of the elastic deformation of the deformation-producing portion of the structure of the transducer.

The invention discloses a UAV charging device based on magnetic coupling wireless power transmission. The UAV charging device comprises a wireless charging module and an energy receiving module installed in an UAV. The wireless charging module comprises a rectifying and filtering circuit, a high-frequency inverter circuit, a transmitting coil, and a relay coil which are connected successively. The relay coil is located in the plane of the transmitting coil and has an axis coinciding with the axis of the transmitting coil. The energy receiving module comprises a receiving coil, a rectifying and voltage stabilizing circuit and a power supply control circuit which are connected successively. The power supply control circuit is connected with a rechargeable battery. The relay coil and the receiving coil have the same size. The wireless charging module and the energy receiving module transmit energy through electromagnetic resonance generated between the relay coil and the receiving coil. The UAV charging device does not need manual charging, can enable the UAV to automatically return and automatically identify and search the wireless charging module when the power of the rechargeable battery is insufficient in order to accurately land to be charged, and greatly improves the using efficiency and the application fields of the UAV.

The invention discloses a single-relay wireless energy transmission system parameter design method. The single-relay wireless energy transmission system parameter design method is characterized by comprising the following steps: S1: a circuit topological structure of the single-relay wireless energy transmission system is determined; S2, self-inductance and coil internal resistance values of the three coils are determined; S3, the working frequency, the mutual inductance parameter and the load resistance value are determined; S4, the capacitance value of an emission coil compensation capacitoris determined; S5, a quality factor and a coupling coefficient are determined; S6, a detuning factor of each loop is defined; S7, a discriminant D is calculated; S8, the optimal detuning factor is determined according to the discriminant; S9, according to the optimal detuning factor, the capacitance values of a relay coil compensator capacitor and a receiving coil compensation capacitor are determined; and S10, the feasibility of all parameters of the system is verified. The single-relay wireless energy transmission system parameter design method provided by the invention has the effects thatthe method is suitable for systems of any frequency, the orientation robustness of the system is greatly improved, and the system design can be effectively guided.

The invention provides a passive wireless sensor system based on third-order parity-time symmetry. The system comprises one non-resonant source coil, three same-resonant-frequency resonance coils (including a transmitting coil, a repeating coil and a receiving coil) and one non-resonant load coil. Each resonance coil regulates the resonant frequency of a single coil by winding multiple turns of wires on the side of an insulated non-magnetic material frame and loading capacitors; by utilizing physical properties of a non-hermitian system based on third-order parity-time symmetry and adjusting coupling distance between the coils, the system is allowed to be located in a third-order exceptional point; and when external small disturbance acts on any one resonant coil, the frequency response ofthe third-order system varies with the cubic root of the external disturbance, so that effect of the small disturbance is greatly magnified, and the induction sensitivity of the system is significantly enhanced.

The invention discloses an optimization design method of a three-coil wireless power supply system. The optimization design method comprises the steps of building a three-coil wireless power supply system equivalent model containing a relay coil; building a Kirchhoff voltage equation of an emission coil, relay coil and receiving coil loop, and determining a relation between a current and inter-coil mutual inductance or coil internal resistance; determining a relation of the current with a relay coil parameter according to a relation among a disc-type spiral coil mutual inductance, internal resistance and the relay coil parameter; and selecting the relay coil parameter to complete optimization design of the three-coil wireless power supply system by combining power unchanged, efficiency improvement and relay coil size limitation. By designing the relay coil parameter, the currents of the emission coil and the relay coil are reduced, so that the line diameter and the weight of the coil are reduced, meanwhile, the power unchanged and efficiency improvement are ensured, and the defect of excessively large current of the emission coil during wireless charging is overcome.

The invention provides a multi-dimensional rotation type wireless electric transmission device. The multi-dimensional rotation type wireless electric transmission device comprises an adjustable-speed rotary electric motor, a wireless electric transmitting rotation repeating coil, a receiving coil and a wireless electric transmitting device power source. The wireless electric transmitting rotation repeating coil supplies power to multiple loads of different positions simultaneously through the rotation mode. The non-contact type energy transmission is carried out by the wireless electric transmitting rotation repeating coil and the receiving coil through a resonant mode. According to the multi-dimensional rotation type wireless electric transmission device, a gap exists between the wireless electric transmitting repeating coil and the receiving coil, and the energy transmission is carried out through the resonance mode. The 360 degree omni-directional rotation is carried out on the rotation repeating coil through the adjustable-speed rotary electric motor. The repeating coil is connected with wireless electric transmitting device power source through an electric conduction link. The rotation repeating coil supplies the power to the multiple loads of the different positions simultaneously through the rotation mode. Due to the fact that the rotation mode is utilized by the rotation repeating coil, the position of the rotation repeating coil can be changed. Based on the resonance principle, the simplest simultaneous power supplying to the multiple loads is achieved, and therefore the practicality is good, the cost is low and the efficiency is high.

The invention discloses an asymmetric four-coil resonator which comprises a primary side and a secondary side, the primary side comprises a transmitting coil and two repeating coils, and the transmitting coil and the two repeating coils are located on the same plane; and the secondary side is a load coil serving as a receiving coil. The invention further discloses a wireless electric energy transmission system with the asymmetric four-coil resonator. The high-frequency high-power inverter comprises an asymmetric four-coil resonator, a high-frequency high-power inverter power supply, an inverter circuit, a rectifying circuit and a load, the asymmetric four-coil resonator is mainly composed of a transmitting coil, a receiving coil and two relay coils, wherein the transmitting coil and the two repeating coils are located on the same plane to serve as a primary side, the secondary side is a load coil to serve as a receiving coil, the high-frequency high-power inverter power supply and theinverter circuit are located on the primary side, and the rectifying circuit and the load are located on the secondary side. The two relay coils are asymmetrically close to the source coil, compared with symmetrical four-coil transmission, the asymmetric coupling model can model circuits of the two relay coils to the primary side, the equivalent inductance value of the primary side is further improved to reduce the current value of the primary side, and therefore the transmission efficiency is improved.

The invention discloses an inductive antenna, an electronic tag and an electronic tag reader-writer to improve the non-contact performance of the electronic tag and / or the electronic tag reader-writer, thereby improving the success rate and effectiveness of using the electronic tag for mobile payment. The electronic tag includes a chip, and is characterized in that it also includes an induction antenna provided with a working coil and a relay coil, wherein: the working coil includes a pair of input terminals and a first coil, and the pair of input terminals is connected to the chip; The relay coil includes at least one second coil connected end to end to form a closed coil; the relay coil is spatially separated from the induction coil by a predetermined distance, and is electromagnetically coupled with the induction coil. By adopting the electronic tag and the electronic tag reader-writer provided by the technical solution of the present invention, the non-contact performance of the electronic tag, the electronic tag reader-writer and the induction antenna can be improved.

Aiming at a wireless electric energy transmission system for three coils, the invention provides a compensation network structure parameter determination method of a three-coil magnetic coupling system containing repeating coils. According to the method, relay coil internal resistance is introduced into a model and then is analyzed, the constant-current output compensation network structure and parameter determination method not influenced by compensation capacitance and internal resistance on a relay coil is obtained, and meanwhile, the problem of cross coupling in a three-coil system is alsoeliminated, so that the system is completely compensated, good output characteristics are obtained, and the method has anti-detuning capability.

The invention provides a multi-load power balanced wireless electric energy transmission system and a configuration method. The system comprises a direct-current power supply module, a transmitting-end electric energy conversion module, a source coil, a plurality of repeating coils, a plurality of resonant compensation capacitors and a plurality of distributed sensor loads. According to the configuration method of the system, the resonance compensation capacitance of the source coil and the resonance compensation capacitance of the repeating coils are calculated; parameters such as inductance,capacitance, resistance and the like of the source coil and the repeating coils and the resistance of the distributed sensor loads are determined through an LCR measurement meter; the mutual inductance between every two adjacent repeating coils under each load power balance condition is calculated; and the relative positions of the repeating coils can be obtained through calculation. Balanced power can be provided for the multiple sensor loads at different distances, and meanwhile, high transmission efficiency and long transmission distance area achieved.

The invention relates to a relay coil-based arbitrary constant-voltage wireless power transmission compensation network and compensation method. The relay coil-based arbitrary constant-voltage wireless power transmission compensation network comprises a transmitting coil loop, a relay coil loop and a receiving coil loop. The transmitting coil loop comprises a voltage source, a transmitting coil and a transmitting coil loop compensation capacitor which are connected in series; the relay coil loop comprises a relay coil and a relay coil loop compensation capacitor which are connected in series;and the receiving coil loop comprises a receiving coil, a receiving coil loop series compensation capacitor, a receiving coil loop parallel compensation capacitor and a load. According to the invention, the parallel compensation capacitor is added on the basis of maintaining an original compensation network structure, and the design of the compensation parameters enables the system to obtain different levels of constant voltage output characteristics and effectively reduce the capacity of the inverter, and the problem of detuning is not easy to occur compared with a traditional three-coil structure.

The invention discloses an optimal frequency configuration method of a single-repeater wireless power transmission system. The single-repeater wireless power transmission system comprises a high-frequency power supply system, a transmitting coil, a repeating coil and a receiving coil. According to the configuration method, with a low coupling coefficient as an entry point, a transmission efficiency expression and a receiving power expression of the single-repeater wireless power transmission system are calculated; and with the working frequency of the system and self-resonant frequencies of various coil circuits as independent variables, the configuration method for various frequency parameters at the optimal transmission efficiency is obtained, so that the configuration method for the working frequency and the self-resonant frequencies of various coil circuits at the maximum receiving power is discussed on the basis of the optimal transmission efficiency. With the optimal transmission efficiency and the maximum receiving power of the wireless power transmission system comprising the repeating coil as targets, a set of complete frequency configuration method is provided; and the key problem of the wireless power transmission system comprising the single repeating coil in the design is solved.

The present invention discloses a different quantities of load access-based single relay multi-load wireless power transmission system work frequency stabilizing method. The single relay multi-load wireless power transmission system includes a high-frequency power system, a transmit coil, a plurality of receive coils, and a relay coil. The method includes the steps of on the basis of balance power allocation of the receive coils, setting an overall space distribution manner of the receive coils, then deducing a system work frequency and a relationship between all coil loop self-resonant frequencies under the conditions of optimal transmission efficiency and maximum receive power, obtaining factors affecting system working frequency, and adjusting the system work frequency by changing a distribution diameter of different quantities of receive coils, so as to maintain the system work frequency unchanged to keep charging power of each load balanced. Through adoption of the method, a major problem of the wireless power transmission system including the single relay multi-load mode is solved, and a clearer guide for multi-load application of the wireless power transmission system in a middle-long range is provided.

A control system may include a processor that may receive a first dataset associated with power properties of a rotating load device coupled to a relay device. The processor may also determine frequency properties based on the power properties and determine a switching profile to control moving a first armature of three armatures in the relay device based on the frequency properties. The switching profile is configured to control movement of the first armature between a first position and a second position, and wherein the switching profile comprises a firing angle for moving the first armature with respect to an electrical waveform, a second armature, and a third armature. The processor may then control a current provided to a relay coil of the relay device based on the switching profile, such that the relay coil causes the first armature to move.

The invention relates to a method for configuring a long-distance wireless power transmission coil applied in a high-voltage occasion. A transmitting coil and a receiving coil are respectively arranged at a high potential and a ground potential. High-voltage field distribution forms between the transmitting coil and the receiving coil, and a relay coil is arranged between the transmitting coil and the receiving coil. The relay coil is in a thin type curved surface shape. The curved surface shape is distributed in consistence with an equipotential surface of the high voltage field. According to the invention, the structure is simple and easy to realize; wireless power transmission efficiency can be raised; and insulation at a high-voltage side and the low-voltage side can be ensured.