16 results about "Repeating coil" patented technology

This invention pertains to implantable medical device technology, specifically relating to a large-gap, offset-resistant wireless power and communication system for implantable medical devices. The system includes an external control module, an external relay module, and an implantable stimulation module. The external control module is used for energy transmission and communication control, while the implantable stimulation module is used for energy reception and information feedback. The external relay module is positioned between the two to improve the wireless power transmission distance and efficiency. The system achieves wireless power transmission through a multi-stage magnetic resonant coupling structure and incorporates a decoupling structure between the relay coils to reduce cross-coupling, ensuring stable transmission performance even under spatial offset conditions. An internal and external wireless communication link is established, integrating energy and information transmission, and closed-loop control is achieved by collecting status information from the energy storage unit. The system can achieve stable and efficient wireless power supply and reliable communication under conditions of large gaps and positional offsets.

The application relates to the technical field of wireless charging of electric vehicles, and particularly discloses a static wireless charging position adaptive control method and system for electric vehicles, wherein the control method comprises the following steps: acquiring the lateral offset distance of the electric vehicle; judging whether the lateral offset distance is smaller than a first preset distance; if yes, controlling the magnetic coupling mechanism to switch to a double-coil coupling mechanism; if not, controlling the magnetic coupling mechanism to switch to a three-coil coupling mechanism comprising a relay coil; the transmitting coil, the relay coil and the receiving coil all adopt annular planar coils, and the transmitting coil is located in the central blank area of the relay coil. The application combines the characteristics that the two-coil structure has high efficiency when the offset distance is short and the three-coil structure has high efficiency when the offset distance is long, adds a switchable relay coil in the coupling mechanism, and optimizes the radius of the relay coil, so that the system efficiency is always kept at a high level within the allowable range of the lateral offset distance.

The invention belongs to the technical field of wireless charging, and particularly relates to an in-vitro charging device of a wireless charging system and implantable medical equipment, the in-vitro charging device comprises an inverter, a transmitting coil and a repeating coil; wherein the inverter is electrically connected with the transmitting coil, so that the transmitting coil generates an induced magnetic field; the repeating coil is passively arranged and is respectively in resonance fit with the transmitting coil and a receiving coil of the in-vivo charging device so as to form a three-coil coupling structure; a relay coil is adjacent to the transmitting coil and overlaps with the transmitting coil. Through the fixed relay coil and closed-loop control, the dual advantages of offset resistance and eddy current suppression are achieved, the wireless charging system can automatically maintain constant output voltage within a certain offset range based on the closed-loop control, the relay coil always keeps a working state in the whole process, switching operation is not needed, and the wireless charging system is simple in structure and convenient to operate. The system is simple in structure, clear and reliable in control logic, and reliably adapts to harsh medical scenes.

An antenna apparatus and an electronic device. A relay coil is added near a main coil of the antenna apparatus, and a corresponding matching circuit is designed for the relay coil, to control a current direction of the relay coil to be the same as / opposite to a current direction of the main coil, so that magnetic fields generated by the main coil and the relay coil are superposed at a peer coil to achieve an effect of magnetic field enhancement. In addition, when the antenna apparatus is applied to an electronic device, if there is a metal assembly near the antenna apparatus in the electronic device, a current direction of the relay coil is the same as / opposite to a current direction of the main coil by designing a corresponding matching circuit, thereby improving performance of the antenna apparatus.

The embodiment of the invention provides a wireless energy transmission system and a detection method of the wireless energy transmission system. The system comprises a transmitting end, a relay coil end and a receiving end, the transmitting end is used for acquiring energy from a high-voltage line and transmitting the energy to the repeating coil end, the repeating coil end is used for transmitting the energy, and the receiving end is used for receiving the energy and providing the energy to a load; the relay coil end comprises a plurality of relay coils, and each relay coil corresponds to a relay control module; the transmitting end comprises a transmitting control module; the relay control module is used for acquiring energy from the relay coil and converting the energy into power supply voltage of the relay control module, and is also used for acquiring first sensing data of the relay coil and sending the first sensing data to the emission control module; and the emission control module is used for reporting the first sensing data to a server. The method is used for achieving the effects of uninterruptedly detecting the relay coil and improving the operation and maintenance efficiency of the wireless energy transmission system.

The invention discloses an induction heating system based on an adjustable impedance relay coil. The induction heating system comprises a power source module, a transmitting coil module, a relay coil module and an equivalent eddy current load, the power source module comprises an alternating current voltage source which is connected with the transmitting coil module; the transmitting coil module is formed by sequentially connecting a transmitting coil compensation capacitor, a transmitting coil internal resistor and a transmitting coil inductor in series; the relay coil module comprises a capacitor switching matrix, a relay coil inductor, a relay coil compensation capacitor and a relay coil internal resistor, wherein the relay coil inductor, the relay coil compensation capacitor and the relay coil internal resistor are sequentially connected in series. The capacitor switching matrix is connected with the relay coil compensation capacitor in parallel. The equivalent eddy current load comprises a load equivalent inductor and a load equivalent resistor which are connected in series; the transmitting coil module transmits energy to the repeating coil module through magnetic coupling; the repeating coil module transmits energy to the equivalent eddy current load through magnetic coupling; the surface of the equivalent eddy current load excites induced eddy current, and electric energy is converted into heat energy. The heating uniformity can be remarkably improved, and the power adjusting range can be widened.

The invention relates to a wireless power transmission system. The invention discloses a method and a system for measuring resonant frequency of a wireless energy transmission system. According to the method, scattering parameter data of the wireless energy transmission system in a certain frequency band are measured, scattering parameters are substituted into a calculation formula, the theoretical maximum energy transmission efficiency G of the wireless energy transmission system is obtained, and the frequency corresponding to the theoretical maximum energy transmission efficiency G is the resonant frequency of the wireless energy transmission system. The resonant frequency measuring system comprises a transmitting coil, a receiving coil, a repeating coil, a scattering parameter measuring instrument and a computer. The method solves the problems of large measurement error and complex measurement process of the resonant frequency of the wireless energy transmission system in the prior art, has the characteristics of simple and feasible calculation formula, reduced calculation difficulty and the like, and is very suitable for measuring the resonant frequency of various wireless energy transmission systems.

This invention discloses a long-distance parity-time symmetric wireless power transfer system with a multi-coil structure, belonging to the field of wireless power transfer technology. The invention includes a transmitting device, relay coil circuits, and a receiving device, with multiple sets of relay coil circuits arranged between the transmitting and receiving devices. Under the associated reference direction, the voltage and current flowing through the full-bridge inverter of the transmitting device are reversed, and together with the power supply, they are equivalent to a single negative resistance -R. N Resonant capacitor C 1s C 1p and resistance - R N The parallel connection, combined with inductor L1 in series, forms an SP structure. The resonant capacitor C of the receiving device... 5s C 5p and load R L The parallel connection, combined with inductor L5 in series, forms a PS structure. This invention not only enhances the energy transfer process but also reduces the critical coupling condition, allowing the system to operate more easily in the strong coupling region. Furthermore, the SP-PS topology further enhances the wide coupling characteristics of the PT system.

The invention provides a multi-relay regulation and control bidirectional dynamic wireless electric energy transmission system for vehicle-to-vehicle electric energy interaction, which is characterized in that a roadside planar coil and a vehicle-mounted planar coil form a first channel, a roadside solenoid coil and a vehicle-mounted solenoid coil form a second channel, and the roadside planar coil and the vehicle-mounted planar coil are spatially orthogonally arranged to realize near zero cross mutual inductance between channels; the primary / secondary side power level realizes bidirectional energy flow through driving switching, and self-adaptive power path selection is carried out based on reverse cut-off of a rectifier diode. The system introduces a gating repeating coil array to enhance adjacent coupling and expand an effective transmission distance; the controller calculates a gating index according to the vehicle distance and the segmented step pitch, a distance-power coupling closed loop is formed by combining a proportional law acceleration instruction, and therefore stable and efficient electric energy interaction is achieved under the dynamic driving working condition.

The application relates to the technical field of wireless power supply, in particular to a multi-relay wireless power supply system modeling method, which comprises the following steps: S1, constructing a circuit equation based on an impedance matrix according to the circuit topology of the multi-relay wireless power supply system, and performing LDU decomposition on the impedance matrix of the system to obtain a lower triangular impedance matrix, a diagonal impedance matrix and an upper triangular impedance matrix; S2, performing forward voltage transformation according to the lower triangular impedance matrix and a system input voltage phasor; S3, solving forward current according to the diagonal impedance matrix and the forward voltage; S4, performing backward current transformation according to the upper triangular impedance matrix and the forward current to solve loop currents of the multiple relay coils. The method can clearly describe the cross-coupling relationship between the coils of the multi-relay wireless power supply system, can decompose the coil composition of each loop, and can be used for analyzing the input, output and other characteristics of the multi-relay wireless power supply system under complex cross-coupling.

The invention discloses a multiband wireless energy and information cooperative transmission system and method, and the system comprises a plurality of coils which are respectively a transmitting coil, a plurality of repeating coils and a receiving coil which are sequentially arranged at equal intervals. Each coil comprises a multi-resonance frequency band circuit, the multi-resonance frequency band circuit comprises a compensation inductor, one end of the compensation inductor is an end point I, the other end of the compensation inductor is connected in series with a compensation capacitor to form a compensation unit, the other end of the compensation capacitor is an end point II, and a resonance inductor and a resonance capacitor are connected in series to form a resonance unit. The resonance unit is connected in parallel with the compensation capacitor; in the transmitting coil, two ends of a high-frequency constant voltage source are respectively connected with an end point I and an end point II of the multi-resonance frequency band circuit; in the relay coil, an end point I and an end point II of the multi-resonant frequency band circuit are connected; in the receiving coil, a load is respectively connected with an end point I and an end point II of the multi-resonance frequency band circuit. According to the invention, cooperative transmission of energy and information is realized.

The application discloses a wireless power transmission compensation topology structure with adjustable constant voltage output of a secondary side without compensation, which comprises a transmitting coil circuit of a primary side, a relay coil circuit and a receiving coil circuit of a secondary side. The application can realize constant voltage output irrelevant to a load under arbitrary coupling without compensation of the secondary side, and different constant voltage output characteristics of the system can be obtained through design of compensation parameters. The application reduces the number of elements of the secondary side circuit as much as possible, only retains necessary receiving coils, does not need additional compensation elements, guarantees light weight, small size and low cost of the receiving side circuit, and is helpful to realize high integration of the secondary side circuit.

This invention relates to implantable medical device technology, specifically to a wireless power transmission coupling system for implantable medical devices. The system includes a coupling mechanism and a wireless power transmission system. The coupling mechanism comprises a transmitting ferrite, a transmitting coil, a first relay coil, a relay ferrite, a second relay coil, and a receiving coil. The transmitting ferrite is located above the transmitting coil, which has a planar helical structure with the first relay coil. The relay ferrite is located above the second relay coil, which has a diagonally crossed orthogonal double-DD structure. The receiving coil has an FPC folded orthogonal double-DD structure. The first and second relay coils are electrically connected. The first and second relay coils are naturally decoupled, and the relay ferrite isolates the magnetic field, making the magnetic coupling between the first and second relay coils approach zero. This coupling mechanism solves problems such as limited transmission distance, poor lateral offset resistance, and unstable output voltage.

This invention discloses a low-profile dynamic multi-load constant voltage output wireless power transmission system, belonging to the field of power transmission technology. It includes a transmitter, multiple coplanar repeater coils, multiple receivers, and a tuning capacitor. The transmitter is driven by a half-bridge or full-bridge inverter circuit with a working frequency of 100kHz, used to output high-frequency inverter voltage. The half-bridge inverter circuit outputs a square wave voltage with an amplitude of [missing value]. By setting double-layer PC40 manganese-zinc ferrite boards on the upper and lower sides of the connection between adjacent coplanar repeater coils, the main coupling coefficient between adjacent coils is increased from 0.09 without ferrite to ≥0.2, and the system transmission efficiency is increased to ≥85%. Simultaneously, the transmitter, repeater coils, and receivers all adopt a planar coil structure with an overall height ≤20mm, allowing for embedding in thin carriers such as desktops, floors, and electric vehicle charging stations. This perfectly adapts to scenarios requiring a low profile, such as smart homes, offices, and electric vehicle charging, resolving the contradiction between low coupling efficiency and large profile size in traditional systems.