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357results about How to "Improve coupling coefficient" patented technology
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Semiconductor device, method of manufacturing semiconductor device, and lead frame thereof
InactiveUS20110049693A1Improve coupling coefficientReduce manufacturing costSemiconductor/solid-state device detailsSolid-state devicesPower semiconductor deviceSemiconductor chip
A first semiconductor chip and a second semiconductor chip are overlapped with each other in a direction in which a first multilayer interconnect layer and a second multilayer interconnect layer are opposed to each other. When seen in a plan view, a first inductor and a second inductor are overlapped. The first semiconductor chip and the second semiconductor chip have non-opposed areas which are not opposed to each other. The first multilayer interconnect layer has a first external connection terminal in the non-opposed area, and the second multilayer interconnect layer has a second external connection terminal in the non-opposed area.
Owner:RENESAS ELECTRONICS CORP
Optical device coupling light propagating in optical waveguide with diffraction grating
ActiveUS20070133648A1Improve coupling coefficientImprove light output characteristicsOptical wave guidanceLaser optical resonator constructionCouplingTransverse mode
An optical waveguide propagates a laser beam. Main diffraction grating and sub-diffraction grating couple light propagating in the optical waveguide. The main diffraction grating and the sub-diffraction grating couple the light in such a manner that propagation in a second order transverse mode of the light propagating in the optical waveguide when both the main diffraction grating and the sub-diffraction grating are disposed, is suppressed more than propagation in the second order transverse mode of the light propagating in the optical waveguide when only the main diffraction grating is disposed.
Owner:FUJITSU LTD
Non-contact power supplying apparatus
ActiveCN101179208AImprove coupling coefficientStrong electromagnetic couplingRail devicesCharging stationsMagnetic coreElectrical battery
This non-contact electric power supply device 6 is used to charge, for example, a battery of an electric vehicle, and electric power is supplied from a primary side, i.e., a primary coil 7 on an electric power supply side to a secondary side, i.e., a secondary coil 8 on an electric reception side based on a mutual induction effect of electromagnetic induction. The primary coil 7 and the secondary coil 8 are flatly and spirally wound in one plane, respectively, (by) making a plurality of parallel conducting wires a set and are twisted at a regular pitch interval along the way. A primary magnetic core 13 and secondary magnetic core 14 on which the primary coil 7 and the secondary coil 8 are disposed are made of ferrite and the like and are formed in a tabular shape. Outer surfaces of the primary coil 7 and the primary magnetic core 13 and outer surfaces of the secondary coil 8 and the secondary magnetic core 14 are covered and secured by molded resin 17, respectively. Foamed materials 18 are mixed in the molded resin 17.
Owner:SHOWA AIRCRAFT INDUSTRY +1
Optical fiber coupler with low loss and high coupling coefficient and method of fabrication thereof
ActiveUS7308173B2Reduce lossImprove coupling coefficientGlass making apparatusOptical fibre with polarisationFiberHigh numerical aperture
Owner:CHIRAL PHOTONICS
Optical fiber coupler array
ActiveUS8326099B2Reduce lossImprove coupling coefficientOptical fibre with polarisationCoupling light guidesHigh numerical apertureCoupling
An optical fiber coupler array capable of providing multiple low loss, high coupling coefficient interfaces between a predetermined number of low numerical aperture optical fibers and an optical waveguide device with at least a corresponding number of waveguide interfaces. The novel coupler array includes a plurality of coupler inner cores and a plurality of corresponding coupler outer cores, within a medium surrounding each plural outer core, and also includes a first end for interfacing with plural optical fibers and a second end for interfacing with a plurality of waveguide interfaces of an optical waveguide device. The sizes of the inner and outer cores are gradually reduced from the first end to the second end in accordance with at least one predetermined reduction profile. Various parameters, such as refractive indices and sizes of the inner and outer cores and the medium (as well as the reduction profile) are selected to produce a plurality of low numerical aperture waveguides at the first end, and a plurality of high numerical aperture waveguides at the second end, while advantageously minimizing insertion loss and maximizing the coupling coefficient at each end. Advantageously, the novel coupler array may be fabricated as an array of individually drawn couplers from multiple parallel fused performs (arranged in a row, or in another geometric cross section). Alternately, the novel coupler array may be fabricated from a single perform (glass or polymer) embedded with a plurality of parallel inner and outer core sets.
Owner:CHIRAL PHOTONICS
Metal-insulator-metal transformer and method for manufacturing the same
ActiveUS7365627B2Save areaReduce spacingSemiconductor/solid-state device detailsTransformers/inductances coils/windings/connectionsMetal-insulator-metalTransformer
The invention is directed to a method for manufacturing a metal-insulator-metal transformer together with a capacitor. The method comprises steps of providing a substrate having at least a dielectric layer formed thereon and then forming a first metal layer of the metal-insulator-metal capacitor together with a first metal coil of the transformer over the substrate. An insulating layer is formed to cover the substrate, the first metal layer and the first metal coil. A second metal layer of the metal-insulator-metal capacitor is formed together with a second metal coil of the transformer on the insulating layer.
Owner:UNITED MICROELECTRONICS CORP
Wireless electric energy transmission magnetic coupling structure and circuit of wireless electric energy transmission magnetic coupling structure
ActiveCN102946154AImprove coupling coefficientImprove transmission efficiencyElectromagnetic wave systemTransformersCouplingElectromagnetic interference
The invention relates to a wireless electric energy transmission magnetic coupling structure, which comprises a magnetic structure at the transmission side and a magnetic structure at the receiving side. The structure is characterized in that the magnetic structure at the transmission side consists of a plurality of rectangular coils, the rectangular coils are distributed in a delta shape, the generated current flows and distributes between adjacent rectangular loops in a reverse flowing direction, the coils at the transmission side form a magnetic field transmission plane, the magnetic structure at the receiving side comprises coil groups which are respectively arranged in three orthogonal directions, and the coil groups respectively induce the magnetic field components in the three orthogonal directions. The structure has the advantages that the coupling coefficient is higher, the electric energy transmission efficiency is higher, the electromagnetic interference on the surrounding space is little, and the structure is widely applied to wireless electric energy transmission systems with various power grades.
Owner:FUZHOU UNIV
Flash memory unit for shared source line and forming method thereof
ActiveCN102315252AImprove coupling coefficientImproved Stress ReliabilitySolid-state devicesSemiconductor/solid-state device manufacturingGate dielectricEngineering
The embodiment of the invention provides a flash memory unit for a shared source line and a forming method thereof. The provided flash memory unit for the shared source line comprises a semiconductor substrate, a source line, a floating gate dielectric layer, a floating gate, a control gate dielectric layer, a control gate, side wall dielectric layers, side walls, a tunneling oxide layer, a word line, a drain electrode and a source electrode, wherein the source line is positioned on the surface of the semiconductor substrate; the floating gate dielectric layer, the floating gate, the control gate dielectric layer and the control gate are sequentially positioned on the surface of the semiconductor substrate on two sides of the source line; the side wall dielectric layers are positioned between the source line and the floating gate as well we between the source line and the control gate; the side walls are positioned on the floating gate and the control gate, which are far from the source line; the tunneling oxide layer is adjacent to the side wall and is positioned on the surface of the semiconductor substrate; the word line is positioned on the surface of the tunneling oxide layer; the drain electrode is positioned in the semiconductor substrate at one side of the word line, which is far from the source line; the source electrode is positioned in the semiconductor substrate which is right opposite to the source line; and the floating gate is provided with a p-type doping end which is close to the source line, wherein the doping type of the floating gate is in a p type and the doping type of other parts is respectively in an n type.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Method of manufacturing a piezoelectric thin film resonator, manufacturing apparatus for a piezoelectric thin film resonator, piezoelectric thin film resonator, and electronic component
ActiveUS7239067B2Avoid unnecessary etchingReliable and easy to manufacturePiezoelectric/electrostriction/magnetostriction machinesImpedence networksElectronic componentPiezoelectric thin films
A method of manufacturing a piezoelectric thin film resonator forms, after forming a piezoelectric film on a substrate so as to cover a lower electrode formed on the substrate, an electrode material layer for forming an upper electrode above the piezoelectric film, forms a mask of a predetermined form on the electrode material layer, and then etches the electrode material layer to form the upper electrode. Before a step of forming the electrode material layer, a protective layer for protecting the piezoelectric film during etching of the electrode material layer is formed so as to cover at least a part of the piezoelectric film where the upper electrode is not formed, and the electrode material layer is then formed so as to cover the protective layer.
Owner:SNAPTRACK
Optical fiber coupler array
InactiveUS20130121641A1Reduce lossImprove coupling coefficientOptical fibre with polarisationCoupling light guidesCouplingHigh numerical aperture
Owner:SINGER JONATHAN +2
Flexible capacitor type micromachining ultrasonic transducer (CMUT) and preparation method thereof
ActiveCN105413997AOvercome deficienciesOvercoming Bandwidth LimitationsMechanical vibrations separationUltrasonic sensorCoupling
The invention discloses a flexible capacitor type micromachining ultrasonic transducer (CMUT). The flexible CMUT comprises a flexible substrate, a lower electrode, an etching sacrificial layer, an organic polymer support layer, an organic polymer vibration thin film and an upper electrode which are arranged sequentially. The organic polymer support layer is provided with a groove, and the groove and the organic polymer vibration thin film form a cavity of the ultrasonic transducer. The invention further discloses a preparation method of the flexible CMUT. According to the flexible CMUT, ultrasonic loss caused by poor coupling is effectively reduced, and the flexible ultrasonic transducer is achieved. The flexible CMUT is suitable for detection objects, including animals' epidermal tissue, of any shapes, so that the application range of the CMUT is effectively widened. The preparation method is simple in preparation process and low in cost.
Owner:SOUTH CHINA UNIV OF TECH
Energy transmitting terminal and energy wireless transmission method
ActiveCN103944281AImprove coupling coefficientReduce electromagnetic radiationElectromagnetic wave systemCircuit arrangementsWireless transmissionCoupling
The invention discloses an energy transmitting terminal and an energy wireless transmission method, and relates to the technical field of energy wireless transmission. According to the energy transmitting terminal and the energy wireless transmission method, the optimal segmentation energy transmitting coil is selected according to location information of the energy transmitting terminal, the coefficient of coupling between the segmentation energy transmitting coil and a receiving coil can be increased, the energy transmission efficiency is improved, and electromagnetic radiation received by a patient is reduced; due to the fact that energy supply can be carried out through a portable lithium battery, the patient can be more free.
Owner:TSINGHUA UNIV
Edge expansion type high coupling coefficient non-contact transformer
InactiveCN101630577AImprove coupling coefficientReduce weight and sizeTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresTransformerCoupling
The invention provides an edge expansion type high coupling coefficient non-contact transformer, comprising a primary magnetic core, a primary winding, a secondary magnetic core and a secondary winding; the bottoms of two side columns of the primary magnetic core or / and the secondary magnetic core extend outward along the lateral side, the windings are respectively wound on the two magnetic core side columns whose bottoms extend outward, two parts of windings on the two magnetic core side columns are forwardly connected in series to form the primary winding or the secondary winding. By methods of enhancing the width of a window and positive areas of primary and secondary magnetic cores, splitting and linking windings, planar distributed windings arrangement and the like, the proportion of magnetic flux directly closed at the primary side can be effectively reduced, and the coupling coefficient of the transformer is improved; the expansion parts at the edge of the magnetic cores are limited at the bottom, thus remarkably reducing the volume and weight of the transformer while obtaining high coupling coefficient. The invention is extremely favourable for miniaturization, lightweight and efficiency of a non-contact power supply system and is suitable for most non-contact electric energy transmission occasions.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Switching Transformer
InactiveUS20090231078A1Improve coupling coefficientSmall sizeTransformers/inductances coils/windings/connectionsInductances/transformers/magnets manufactureBobbinTransformer
There is provided a switching transformer which enables material costs to be reduced while the performance to be improved, permitting cost and size reductions, and which is suitable for mass production by ensuring good assemblability. Instead of using a conventional coil bobbin having a winding drum part, a center-leg-having core 3 having the shape of a substantially inverted T is integrated with a terminal block 1 having a substantially flat upper surface and terminals implanted in a lower surface. An electric wire 6a is wound around the outer circumference of a center-leg core 3b protruding from the upper surface 1a of the terminal block 1, thereby a coil 6 is mounted. A C-type core 4 is built into this assembly to form a switching transformer.
Owner:TAMURA KK
Transformer and plate coil molded body
ActiveUS20170032888A1Improve AssemblabilityIncrease productivityTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresTransformerEngineering
A transformer is provided, which includes a magnetic core, a primary coil module including a coil support arranged in the magnetic core and a primary coil formed on the coil support, an upper secondary coil module including an upper insulation molded body arranged on an upper portion of the primary coil module and an upper plate coil buried in the upper insulation molded body and arranged to face the primary coil, and a lower secondary coil module including a lower insulation molded body arranged on a lower portion of the primary coil module and a lower plate coil buried in the lower insulation molded body and arranged to face the primary coil.
Owner:SOLUM CO LTD
Wireless power and data transmission system for visual prosthesis
A wireless energy and data transmission system for visual prostheses in the technical field of biomedical engineering, including: an external wireless device located outside the body, an internal wireless device located inside the body, and a data reverse transmission module. The external wireless device receives encoded images After the signal is modulated, it is transmitted wirelessly to the wireless device in the body. The wireless device in the body rectifies and demodulates and receives the driving power and the received signal respectively. The data reverse transmission module monitors the impedance and temperature information in the body, and transmits the data to the external coil through the internal coil , the external reverse demodulation circuit recovers the impedance and temperature information, and the external device adjusts the input power according to the state in the body. The invention has the characteristics of simple circuit, small volume, high efficiency and the like.
Owner:SHANGHAI JIAO TONG UNIV
Split gate type flash memory and forming method thereof
ActiveCN102938406AImprove work efficiencyReduce coupling capacitanceSolid-state devicesSemiconductor/solid-state device manufacturingState of artCapacitance
The invention discloses a split gate type flash memory which comprises a semiconductor substrate, a word line, two discrete storage bit units and oxidation layers, wherein the word line is located at the bottom surface of the semiconductor substrate; the two storage bit units are located at two sides of the word line; the oxidation layers are arranged between the two storage bit units and the word line; each storage bit unit comprises a first insulation layer which is located on the bottom surface of the semiconductor substrate, a floating gate which is located on the surface of the first insulation layer, a second insulation layer which is located on the surface of the floating gate, a control gate which is located on the surface of the second insulation layer and a side wall structure which covers the floating gate and the control gate; each floating gate comprises a first floating gate and a second floating gate; and the distance between each first floating gate and the word line is greater than the distance between each second floating gate and the word line. The distance between the first floating gates and the word line is greater than the distance in the prior art, so that the coupling capacitance between the floating gates and the word line is smaller than the capacitance in the prior art, the coupling capacitance between the word line and the floating gates is as small as possible and then the erasing efficiency and the read-write efficiency of the flash memory are improved.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Wireless electric energy transmission loosen magnetic-coupling transformer device with large offset fault-tolerance range and circuit thereof
ActiveCN108461264AImprove couplingOptimizing Coil SizeTransformersCircuit arrangementsFault toleranceElectric vehicle
The invention discloses a wireless electric energy transmission loosen magnetic-coupling transformer device with a large offset fault-tolerance range and a circuit thereof. The device comprises an emission module, a receiving module and a shielding mechanism, wherein the emission module and the receiving module respectively comprises an insulation plate, a strip-shaped magnetic core and a transformer coil, the insulation plate is made of an insulation material, the strip-shaped magnetic coil is fixed by the insulation plate, the transformer coil is formed by winding multiple strands of litz lines in parallel, the coil is wound around an upper surface and a lower surface of the insulation plate to form a spiral structure or are wound around one side to form a single-side staggered structure, and the shielding mechanism has a magnetic leakage shielding effect by a metal plate on a back part of the coil. A primary side and a secondary side of the transformer respectively employ a double-side spiral coil structure and a dual-path staggered coil structure, the dual paths of staggered coils are connected by an external circuit, so that the primary side and the secondary side can achieverelatively high coupling coefficient and relatively high integral efficiency under the condition of relatively large deviation, and the device has relatively small electromagnetic interference and canbe widely an electric vehicle wireless charging system with different power classes.
Owner:ZHEJIANG UNIV
Optical fiber coupler array
ActiveUS20100008624A1Reduce lossImprove coupling coefficientOptical fibre with polarisationCoupling light guidesCouplingHigh numerical aperture
An optical fiber coupler array capable of providing multiple low loss, high coupling coefficient interfaces between a predetermined number of low numerical aperture optical fibers and an optical waveguide device with at least a corresponding number of waveguide interfaces. The novel coupler array includes a plurality of coupler inner cores and a plurality of corresponding coupler outer cores, within a medium surrounding each plural outer core, and also includes a first end for interfacing with plural optical fibers and a second end for interfacing with a plurality of waveguide interfaces of an optical waveguide device. The sizes of the inner and outer cores are gradually reduced from the first end to the second end in accordance with at least one predetermined reduction profile. Various parameters, such as refractive indices and sizes of the inner and outer cores and the medium (as well as the reduction profile) are selected to produce a plurality of low numerical aperture waveguides at the first end, and a plurality of high numerical aperture waveguides at the second end, while advantageously minimizing insertion loss and maximizing the coupling coefficient at each end. Advantageously, the novel coupler array may be fabricated as an array of individually drawn couplers from multiple parallel fused performs (arranged in a row, or in another geometric cross section). Alternately, the novel coupler array may be fabricated from a single perform (glass or polymer) embedded with a plurality of parallel inner and outer core sets.
Owner:CHIRAL PHOTONICS
CMUT (Capacitive Micromachined Ultrasonic Transducer)-based biochemical transducer and manufacturing method thereof
InactiveCN102520032AReduce thicknessReduce quality problemsMaterial electrochemical variablesElectrical field strengthCapacitive micromachined ultrasonic transducers
The invention provides a CMUT (Capacitive Micromachined Ultrasonic Transducer)-based biochemical transducer and a manufacturing method thereof. The CMUT-based biochemical transducer comprises a sensitivity identification material layer, an upper electrode, a silicon dioxide film, a silicon strut, a lower electrode, a silicon dioxide insulating layer and a silicon substrate in sequence from top to bottom. According to the biochemical transducer, the metal lower electrode is completely isolated from the silicon substrate, the method which takes the substrate as the lower electrode in the conventional CMUT based biochemical transducer is replaced, the power consumption is reduced, the electric field strength between the upper electrode and the lower electrode is greatly improved, and the electromechanical coupling capability is strengthened; the lower electrode is only positioned inside a cavity formed by the silicon dioxide film, the silicon strut and the silicon dioxide insulating layer, so that the lower side of the film is effectively vibrated rather than covering the whole silicon substrate, the parasitic capacitance is effectively reduced, the electromechanical conversion ratio is further increased, and the effective utilization rate of electric energy is improved.
Owner:XI AN JIAOTONG UNIV
Three-dimensional semiconductor device and manufacturing method thereof
InactiveCN105390500AImprove reliabilityImprove coupling coefficientSolid-state devicesSemiconductor/solid-state device manufacturingCouplingBlocking layer
The invention discloses a three-dimensional semiconductor device, which comprises multiple storage units. Each storage unit comprises a channel layer stack, multiple insulated layers, multiple pairs, a tunneling layer, a drain and a source, wherein the channel layer stack is distributed along the direction vertical to the surface of a substrate; the multiple insulated layers are alternately stacked along the side wall of the channel layer stack; the multiple pairs are formed by floating gates and control gates and horizontally and adjacently located between adjacent insulated layers, and at least one blocking layer exists between the floating gate and the control gate; the tunneling layer is located between the floating gate and the side wall of the channel layer stack; the drain is located at the top of the channel layer stack; the source is located on the substrate between adjacent two storage units of the multiple storage units; and the floating gates and the control gates are mutually matched to form a bent interface. According to the three-dimensional semiconductor device and the manufacturing method thereof, the control gates and the floating gates can be mutually engaged in the same horizontal level, the coupling coefficient from the control gates to the floating gates is effectively improved, coupling between vertical string units is reduced, and device reliability is improved.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI
Wireless energy transmission intelligent charging device
PendingCN106451822ADoes not increase curb weightImprove coupling coefficientBatteries circuit arrangementsCharging stationsElectricityMobile relay
The invention disclose a wireless energy transmission intelligent charging device, including a loose coupling voltage transformer and a mobile relay coupler, the original edge emission coil of the loose coupling voltage transformer is provided under the ground, and is used for launching magnetic field energy, a secondary receiving coil is provided on an electricity receiving device, and is connected with the electricity receiving device, and when the secondary receiving coil reaches the location of the original edge emission coil, the electricity receiving device sends out an electricity charging order; the mobile relay coupler according to the electricity charging order moves to the location of the original edge emission coil, and transmits the magnetic field energy of the original edge emission coil to the secondary receiving coil, the secondary receiving coil converts the received magnetic field energy to electric energy and outputs to the electricity receiving device. The mobile relay coupler is located between a base plate of the electric car and the ground, increases the coupling coefficients of the coil in the loose coupling voltage transformer, thereby increasing the ability of electricity energy transmission and the efficiency of transmission. Because of the separate installation of the mobile relay coupler and the electric car, the device cannot add to the kerb mass of electric cars.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Semiconductor device that performs signal transmission using induction coupling, method of said manufacturing semiconductor device, and lead frame thereof
InactiveUS8378470B2Improve the overall coefficientImprove coupling coefficientSemiconductor/solid-state device detailsSolid-state devicesCouplingSemiconductor chip
A first semiconductor chip and a second semiconductor chip are overlapped with each other in a direction in which a first multilayer interconnect layer and a second multilayer interconnect layer are opposed to each other. When seen in a plan view, a first inductor and a second inductor are overlapped. The first semiconductor chip and the second semiconductor chip have non-opposed areas which are not opposed to each other. The first multilayer interconnect layer has a first external connection terminal in the non-opposed area, and the second multilayer interconnect layer has a second external connection terminal in the non-opposed area.
Owner:RENESAS ELECTRONICS CORP
High-efficient erasing and writing flash memory in grating
ActiveCN101419972AImprove coupling coefficientHigh densityTransistorSolid-state devicesGratingDielectric layer
The invention provides an efficiently erasable and writable split-gate flash memory. The split-gate flash memory comprises a semiconductor substrate which has a source electrode area and two drain electrode areas which are positioned at the two sides of the source electrode area and separated by a channel area; source electrode wires which are positioned above the source electrode area and interconnected; two floating gates which are arranged at two sides of the source electrode wires as memory cells, are in L-shaped symmetrical distribution, are separated by an insulating dielectric layer, and side edges of which are respectively adjacent to the source electrode wires, part of the source electrode area and part of the channel area; two control gates which are respectively adjacent to thetwo L-shaped floating gates and separated by the insulating dielectric layer; and two word lines which are respectively adjacent to the two control gates, the side edges of the two L-shaped floating gates, part of the channel area and part of the two drain electrode areas, and are separated from each other by the insulating dielectric layer. In the efficiently erasable and writable split-gate flash memory, the programming voltage thereof can be further reduced, thus improving the device density.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Loosely coupled transformer device for wirelessly charging electric vehicle
ActiveCN105405622AReduce weightImprove shielding effectTransformersCircuit arrangementsCouplingLitz wire
The invention discloses a loosely coupled transformer device for wirelessly charging an electric vehicle. The device comprises an emission module, a reception module and two shielding cover plates, wherein the emission module and the reception module are coupled to each other. According to the technical scheme of the invention, the magnetic leakage at the back of a transformer can be well shielded by the shielding cover plates. Meanwhile, a magnetic conductive core structure is arranged in each shielding cover plate, so that the flow direction of the magnetic leakage at the back of the transformer can be guided by the magnetic conductive core structure. The coupling coefficient of primary and secondary sides is increased. Meanwhile, the loss of the cover plates is reduced and the efficiency of the whole device is improved. At the same time, a plurality of strands of litz wires are connected in parallel to form a coil, so that the coil loss of the transformer is reduced. A strip-shaped magnetic core reduces the weight of the transformer and increases the coupling coefficient of primary and secondary sides. By means of an insulating plate, the magnetic core and the coil can be conveniently fixed. Therefore, the above transformer device is good in shielding performance, simple, firm, high in coupling coefficient of primary and secondary sides, and high in overall efficiency. As a result, the device is very suitable for the wireless charging of electric vehicles.
Owner:ZHEJIANG UNIV
LTCC low temperature co-fired ceramic flat surface transformer
InactiveCN101789311AIncreasing the thicknessMiniaturizationTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresCapacitanceCoupling
The invention relates to an LTCC low temperature co-fired ceramic planar transformer. The transformer comprises a ferrite magnetic core composed of an upper magnetic core and a lower magnetic core. The transformer is characterized in that the transformer also comprises an LTCC planar transformer base plate provided with at least one group of planar coil component, each planar coil component comprises a primary coil with high coupling coefficient and a secondary coil; the LTCC planar transformer base plate is provided with one or three penetrating holes used for assembling the ferrite magnetic core; and the upper and lower magnetic cores separately penetrate the penetrating holes from the upper and lower sides of the LTCC planar transformer base plate and are butted and adhered together to form the ferrite magnetic core. Compared with the traditional planar transformer, the LTCC low temperature co-fired ceramic planar transformer of the invention has the following beneficial effects: the transformer of the invention has low direct current impedance, leakage inductance and distributed capacitance and can satisfy the design requirement of the resonance circuit; and as the magnetic core has good magnetic shielding, the transformer can inhibit the radio frequency interference.
Owner:SHENZHEN SUNLORD ELECTRONICS
Wireless charge receiver and wireless charge method
ActiveCN109861353AImprove coupling coefficientIncrease freedomBatteries circuit arrangementsElectric powerCouplingPulse energy
The embodiment of the present invention discloses a wireless charge receiver and a wireless charge method. The method comprises the steps that: a receiver uses a first oscillating circuit to receive pulse energy emitted by an emitter, wherein the first oscillating circuit comprises a first receiving coil configured to convert pulse energy and output electric energy; when a voltage value output bythe first oscillating circuit is increased to a first reference voltage value, the receiver sends a power transmission command to the emitter through a communication module to allow the emitter to send energy according to the power transmission command, wherein the first reference voltage value is a working voltage threshold value of a processor; and the receiver receives the energy emitted by theemitter according to the power transmission command through a second oscillating circuit. A new coil is arranged at the receiver to increase the coupling coefficient with the emitter in the Ping stage and improves the degree of freedom. After a preset voltage value is reached, the receiver uses the receiving coil to receive the energy transmitted by the emitter so as to ensure the transmission efficiency while lifting the degree of freedom.
Owner:HUAWEI DIGITAL POWER TECH CO LTD
Motor controller
InactiveCN101359888AImprove coupling coefficientImprove efficiencyGenerator control circuitsVector control systemsReduced sizeMotor controller
A motor controller for an axial-gap motor permits a reduced size of the entire system of including a drive circuit and a power source of the motor, reduced cost, and higher reliability to be achieved by controlling the energization mode of the motor. The motor controller has a torque command determiner (50) which inputs a first DC voltage VH-s to a first inverter (32a) at least either when a rotor (11) is at a halt or when the number of revolutions delta theta m / delta t of the rotor is a predetermined number of revolutions or less, supplies a field axis current Idf for changing the magnetic flux of a field of the rotor (11) to a first stator from the first inverter such that the amount of energization is temporally changed, converts an induced voltage developed in a second stator (12b) by the supplied field axis current into a second DC voltage by a second inverter (32b), and outputs the second DC voltage, thereby charging a second battery (38b).
Owner:HONDA MOTOR CO LTD
On-chip transformer Balun
ActiveCN107293393AImprove coupling coefficientReduce lossTransformers/inductances coils/windings/connectionsVariable inductancesElectricityTransformer
An on-chip transformer Balun comprises a primary coil and a secondary coil, wherein the turns of the primary coil is N, a first terminal and a second terminal of the primary coil are arranged on a winding at the outermost turns so that (N-1) lamination regions exist in the winding of the primary coil, the primary coil comprises a plurality of first metal lines and a plurality of connection bridges which are arranged in a staggered way along a winding direction, the first metal lines are arranged on the same plane, the connection bridges are arranged below the plane, the connection bridges are electrically connected with the first metal lines at the lamination regions, upper surfaces of the connection bridges are covered by a dielectric layer below the plane, N is more than or equal to 2, the secondary coil with M turns is arranged on the plane, and a winding of the secondary coil is arranged between two adjacent turns of windings of the primary coil. The on-chip transformer Balun disclosed by the scheme is relatively large in coupling coefficient and small in energy loss, the turn numbers of the primary coil and the secondary coil are relatively large, and the manufacturing process is low in cost.
Owner:SEMICON MFG INT (SHANGHAI) CORP +1
Optical delayer coupled through adopting multiple-mode interference
InactiveCN101881859AImprove working bandwidthSmall sizeCoupling light guidesResonant cavityTime delays
The invention discloses an optical delayer coupled through adopting multiple-mode interference, which adopts an all-pass filter structure; the all-pass filter structure is a structure of the sequent coupling of a plurality of micro ring resonant cavities and a bus waveguide, wherein the coupled segment between the micro ring resonant cavities and the bus waveguide is of a 2*2 multiple-mode interference coupler. Adopting the multiple-mode interference coupled structure, the invention can improve the coupling efficiency between the micro ring resonant cavities and the bus waveguide, and makes the optical delayer have wider operation bandwidth. The invention has high technical redundancy, is easy to manufacture, has small size, is suitable for dense integration, also has the characteristics of wide bandwidth and big time delay, the structural design with different splitting ratio increases the flexibility of the device application, and the delayer is suitable for being used as an optical buffer device of high-speed all-optical packet switching network in the future.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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