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127 results about "Magnetic integration" patented technology
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Multiphase clamp coupled-buck converter and magnetic integration
InactiveUS6784644B2Emergency protective circuit arrangementsApparatus without intermediate ac conversionVoltage regulator modulePush pull
Voltage regulation, transient response and efficiency of a voltage regulator module (VRM) is improved where short duty cycles are necessitated by large differentials of input and output voltage by including at least one clamping of a tap of an inductance in series with an output of each of a plurality of parallel branches or phases which are switched in a complementary fashion or providing coupling between inductors of respective phases. Such coupling between inductors is achieved in a small module with an integrated magnetic structure. Reduced component counts are achieved while deriving built-in input and output filters. Principals of the invention can be extended to isolation applications and push-pull forward converts, in particular. A lossless clamping circuit is also provided allowing spike currents to be suppressed while returning power to the output of the VRM.
Owner:VIRGINIA TECH INTPROP INC
Multiphase clamp coupled-buck converter and magnetic integration
InactiveUS20020118000A1Emergency protective circuit arrangementsDc-dc conversionVoltage regulator modulePush pull
Voltage regulation, transient response and efficiency of a voltage regulator module (VRM) is improved where short duty cycles are necessitated by large differentials of input and output voltage by including at least one clamping of a tap of an inductance in series with an output of each of a plurality of parallel branches or phases which are switched in a complementary fashion or providing coupling between inductors of respective phases. Such coupling between inductors is achieved in a small module with an integrated magnetic structure. Reduced component counts are achieved while deriving built-in input and output filters. Principals of the invention can be extended to isolation applications and push-pull forward converts, in particular. A lossless clamping circuit is also provided allowing spike currents to be suppressed while returning power to the output of the VRM.
Owner:VIRGINIA TECH INTPROP INC
Magnetic integration structure
InactiveUS20080224809A1Reduced winding spaceReduce partTransformers/inductances coils/windings/connectionsVariable inductancesMagnetic integrationEngineering
Owner:FUJI ELECTRIC CO LTD +1
High voltage gain bidirectional DC-DC (direct current-direct current) converter based on switching capacitors and coupling inductors
InactiveCN104218798ASmall rippleReduce the size of the inductorDc-dc conversionElectric variable regulationCapacitanceHigh frequency power
The invention discloses a high voltage gain bidirectional DC-DC (direct current-direct current) converter based on switching capacitors and coupling inductors. The high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors is formed by combining Boost convertors, the coupling inductors and the switching capacitors in interleaved mode. An electric circuit of the high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors comprises n / 2 coupling inductors T1[L1, L2], T2[L3, L4]... T(n / 2)[L(n-1), Ln], 2n high frequency power switches S1, S2... Sn and Q1, Q2... Qn, N-1 high frequency switching capacitors C1, C2... C(n-1) and two input and output filter capacitors CL and CH. The high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors can effectively reduce current stress of a low voltage side power device and voltage stress of a high voltage side power device, further reduces the ripple of an input current and decrease the inductor size by using the coupling inductors, improves efficiency of an exchanger, and achieves bidirectional DC-DC conversion high in efficiency and high in voltage gain. According to high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors, an interleaved technology, a magnetic integration technology and a switching capacitor technology are combined, and therefore novel topology of the high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors not only has characteristics of being low in ripple of the input current and easy to design in EMT mode of an interleaved converter, but also achieves the purposes that a transformation ratio of input voltage and output voltage is large and switch voltage stress is low.
Owner:TIANJIN UNIV
Magnetic integrated self-driving current-double rectification half-bridge three-level direct-current converter
InactiveCN102611310AReduce on-state lossSimple structureDc-dc conversionElectric variable regulationThree levelCapacitance
The invention discloses a magnetic integrated self-driving current-double rectification half-bridge three-level direct-current converter, comprising an input partial-voltage capacitor circuit, a half-bridge three-level bridge arm, an isolated transformer, a driving circuit and a rectification and filtering circuit. According to the magnetic integrated self-driving current-double rectification half-bridge three-level direct-current converter, voltage stress of a main switch tube is reduced through a half-bridge three-level topology without a flying capacitor and an embedded diode, and a problem of reliability of the embedded diode of the conventional half-bridge three-level topology is solved at the same time; conduction loss of a vice-side rectification tube is reduced by a synchronous rectification proposal; the conduction loss of a vice side of a transformer is further reduced by a current-double rectification technology, and the efficiency is improved; the structure and the volume of a converter are simplified through a magnetic integration and automatic driving scheme; and the main transformer integrates output filter inductance therein by utilizing a two-transformer primary-side serial-connection vice-side alternating parallel connection structure so that the power density of the converter is improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Two-way two-tube positive excitation converter topology
InactiveCN1545200AReduce voltage stressImprove reliabilityAc-dc conversionDc-dc conversionCapacitanceElectricity
The invention relates to a two-way two-tube forward converter topology, its main circuit composed of power supply, four power diodes, two primary side clamping diodes, two serial capacitances, a main power transformer composed of primary winding and secondary winding with a secondary side composed of a rectifier with two rectifier diodes and an output filter capacitance. It remains the advantages of low primary-side voltage stress of a two-way two-tube forward converter, no direct turn-on of bridge arm, high reliability, etc; compared with general two-way two-tube forward converters, it has only two clamping diodes and simple structure; it adopts magnetic integration technique of transform, further reducing the bulk and enhancing power density of transform. It not only implements zero voltage turn-on and turn-off, but also basically eliminating voltage peak of diodes in the secondary rectifier by the clamping action of filter capacitance, having very high efficiency.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Interleaved parallel magnetic-integration bidirectional full-bridge LLC resonant converter
PendingCN106936320AIncrease powerRaise the ratioEfficient power electronics conversionDc-dc conversionFull bridgeMagnetic integration
The invention provides an interleaved parallel magnetic-integration bidirectional full-bridge LLC resonant converter and relates to the technical field of power and electronic applications. The interleaved magnetic-integration bidirectional full-bridge LLC resonant converter comprises two paths of an interleaved parallel bidirectional full-bridge LLC resonant converter. The first path of the bidirectional full-bridge LLC resonant converter comprises a first primary-side circuit, a first secondary-side circuit, a resonant transformer and a magnetic inductor thereof. The second path of the bidirectional full-bridge LLC resonant converter comprises a second primary-side circuit, a second secondary-side circuit, a resonant transformer and a magnetic inductor thereof. The primary-side circuit and the secondary-side circuit of each path of the bidirectional full-bridge LLC resonant converter are respectively in the form of a full-bridge LLC resonant circuit and are used for realizing the bidirectional energy flow. The two resonant transformers, the magnetic inductors thereof and four resonant inductors of the two paths of the interleaved parallel bidirectional full-bridge LLC resonant converter are magnetically integrated through integrated magnetic pieces. According to the technical scheme of the invention, the large-power, high-transformation-ratio, small-volume, bidirectional and high-efficiency operation of the electric energy is realized.
Owner:LIAONING TECHNICAL UNIVERSITY
Magnetic integration type integrated filter inductance transformer
InactiveCN102867628ARealize integrated designImprove power qualityTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresCapacitanceMagnetic integration
The invention discloses a magnetic integration type integrated filter inductance transformer which is characterized in that the transformer adopts two sets of triphase shell-type iron core structures or two sets of single-phase shell-type iron core structures; an alternating current network side winding and a load winding are only wound on a main iron core post, and filtering windings are simultaneously wound on the main iron core post and an auxiliary iron core post; the main iron core structure is the same as the traditional shell-type transformer, and the iron core magnetic circuit is closed; the auxiliary iron core adopts a magnetic circuit structure with an air gap; the number of sets of filtering windings is configured according to the filtering requirement of a system, and each set of windings are externally connected with a corresponding filtering capacitor to jointly constitute a specific subharmonic filtering branch. According to the invention, a filter reactor and the transformer are integrated, and the filtering windings can realize effective harmonic suppression through externally connecting the filter capacitor, thus one-time cost of investment is greatly reduced; and at the same time, the auxiliary iron core structure provides a circulation path for leakage magnetic flux between the primary and secondary windings, restricts the circulation direction of the leakage magnetic flux, and is beneficial to reducing the stray loss of the transformer, thus improving the operating efficiency of the transformer.
Owner:HUNAN UNIV +2
Integrated magnetics based interleaved flyback micropower grid-connected inverter
InactiveCN102856926AImprove efficiencyLow costClimate change adaptationSingle network parallel feeding arrangementsGrid connected inverterMagnetic integration
The invention relates to an integrated magnetics based interleaved flyback micropower grid-connected inverter in a two-stage structure. The front stage is an interleaved flyback transform circuit adopting integrated magnetics, wherein interleaved flyback discrete transformers are integrated on one magnetic chip by means of magnetic integration technique. The rear stage is a low-frequency full-bridge inverter circuit, grid-connected current is controlled at the front stage, and power frequency inversion and grid connection are realized by the rear-stage circuit. The integrated magnetics based interleaved flyback micropower grid-connected inverter has the advantages of high power density, high efficiency, low grid-connected current distortion rate, easiness in development, low cost and the like, and is especially suitable for micropower grid-connected inverters.
Owner:FUZHOU UNIV
Magnetic integration double-ended converter
ActiveUS20120201053A1Reduce lossesHigh efficient conversion of energyEfficient power electronics conversionApparatus with intermediate ac conversionMagnetic integrationEngineering
A magnetic integration double-ended converter with an integrated function of a transformer and an inductor includes an integrated magnetic member having a magnetic core with three magnetic columns having at least three windings (NP, NS1, NS2) and at least one energy storage air gap, where a primary winding (NP) and a first secondary winding (NS1) are both wound around a first magnetic column or are both wound around a second magnetic column and a third magnetic column, and a second secondary winding (NS2) is wound around the second magnetic column; an inverter circuit with double ends symmetrically working, acting on the primary winding (NP); and a group of synchronous rectifiers (SR1, SR2), gate electrode driving signals of which and gate electrode driving signals of a group of power switch diodes (S1, S2) of the inverter circuit with the double ends symmetrically working complement each other.
Owner:HUAWEI TECH CO LTD
Isolated bidirectional resonance soft switching DC-DC converter
ActiveCN111245247ASimple topologyReduce difficultyEfficient power electronics conversionDc-dc conversionSoft switchingSwitching power
The invention discloses an isolated bidirectional resonance soft switching DC-DC converter. A topological structure of the isolated bidirectional resonance soft switching DC-DC converter comprises twoactive bridges and a resonant cavity, the converter is simple in topological structure and is convenient to realize magnetic integration, thereby having the potential of realizing the high power density. Meanwhile, the converter can realize the wide-range flexible adjustment of the bidirectional voltage gain by means of a simple frequency conversion control mode, so that the reliability is enhanced. In addition, the converter can realize the zero-voltage switching-on (ZVS) of an inverter switching tube and the zero-current switching-off (ZCS) of a rectifier switching tube in a very wide range, so that the switching loss is greatly reduced. The converter can be applied to various occasions needing bidirectional power flow, such as an energy storage system, a storage battery charging and discharging controller in an electric automobile, a switching power supply, etc.
Owner:TIANJIN UNIV
Efficiency optimization control method for bidirectional converter in microgrid energy storage system
InactiveCN107332265AOptimize the high-efficiency operating rangeImprove current rippleDc-dc conversionAc network load balancingMicrogridFrequency modulation
The invention discloses an efficiency optimization control method for a bidirectional converter in a microgrid energy storage system, which combines traditional light-load phase switching control, multi-degree of freedom frequency modulation control and a phase-shifting magnetic technology. The energy storage system adopts a six-phase interleaved parallel bidirectional converter main circuit. The efficiency optimization control method comprises the steps of firstly building a load current loss model, and deducing load current corresponding to an optimal phase switching point; secondly, seeking the optimal operating frequency under phase switching control by adopting multi-degree of freedom frequency control; and finally, suppressing ripple deterioration under the light load, the switched phase and the low frequency by adopting a phase shifting technology and a magnetic integration design to achieve a control target of higher efficiency operation under light load conditions. Compared with a bidirectional converter in the microgrid energy storage system in the prior art, the efficiency optimization control method can effectively improve low light-load efficiency of the bidirectional converter in the microgrid energy storage system and solve a problem of ripple deterioration easily caused by traditional phase switching control, greatly expands a high-efficiency operation range of the bidirectional converter and improves the stability and reliability of the system.
Owner:LIAONING TECHNICAL UNIVERSITY
Magnetic-integration three-phase filter transformer
ActiveCN103680888AOverall small sizeReduce volumeTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresCapacitanceLow voltage
The invention discloses a magnetic-integration three-phase filter transformer. The magnetic-integration three-phase filter transformer comprises a transformer core window, wherein a leakage flux branch plate is arranged in the transformer core window; gaps are respectively reserved between the leakage flux branch plate and an upper yoke and between the leakage flux branch plate and a lower yoke; a high-voltage winding coil and a low-voltage winding coil are respectively wound between core columns and the leakage flux branch plate; a low-voltage winding is positioned on the inside, and a high-voltage winding is positioned on the outside; and a filter capacitor is connected with the low-voltage winding coil in parallel. A filter inductor is integrated with the transformer, so that the size of the integrated body of the inductor and the transformer is small, the inductor and the transformer are light, and materials are saved. The columns of three-phase cores are in magnetic flux with the filter inductor and the transformer simultaneously. When the magnetic flux is highest, common magnetic flux and leakage magnetic flux are in different phases, and magnetic cores can be saved to a certain degree. Four single-phase windings of the transformer also have a filtering function, and substitute an independent filter inductor. Moreover, the number of used copper wires of the transformer and the inductor which are integrated is smaller than the number of used copper wires of the transformer and the inductor which are independent from each other.
Owner:XI AN JIAOTONG UNIV +1
Multi-winding magnetic integrated type hybrid power distribution transformer
ActiveCN106887957AIncrease control capacityIncrease profitTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresEngineeringConductor Coil
Owner:XI AN JIAOTONG UNIV
Magnetic integration transfer circuit system
ActiveCN101860235AStable outputAchieve simplicityAc-dc conversion without reversalMagnetic integrationConductor Coil
The embodiment of the invention discloses a magnetic integration transfer circuit system which is applied to the technical field of power supply. The magnetic integration transfer circuit system comprises a main source voltage acquiring unit and at least one auxiliary source voltage acquiring unit, wherein the main source voltage acquiring unit comprises an integrated magnetic piece with at leastthree cylinders, a primary winding, at least two main secondary windings and a main source voltage stabilizing output circuit; the auxiliary source voltage acquiring unit comprises an auxiliary secondary winding and an auxiliary source voltage output circuit, two ends of the primary winding are connected with an input power supply, the at least two main secondary windings are respectively wound on at least two of the cylinders in the integrated magnetic piece and are connected with the main source voltage stabilizing output circuit; and the auxiliary secondary winding is wound on the cylinderwith an energy storing gap in the integrated magnetic piece and is connected with the auxiliary source voltage output circuit. The invention reduces the space volume of the auxiliary circuit of the power supply, thereby simplifying the high-power power supply.
Owner:HUAWEI TECH CO LTD
Interleaved magnetic integration type coupling inductor
InactiveCN103077803AAchieve integrationMiniaturizationTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresChinese charactersMagnetic integration
The invention relates to an interleaved magnetic integration type coupling inductor, consisting of an E-Chinese character 'Wang'-I-shaped core body and a coil, wherein the E-Chinese character 'Wang'-I-shaped core body consists of a Chinese character 'Wang'-shaped core, an E-shaped core and an I-shaped core; the E-shaped core and the I-shaped core are arranged at the both sides of the Chinese character 'Wang'-shaped core in the middle of the core body; two-phase coils are respectively wound on two middle posts of the Chinese character 'Wang'-shaped core; three magnetic path air gaps are arranged at contact positions of one sides of three transverse yokes of the Chinese character 'Wang'-shaped core and three transverse yokes of the E-shaped core; and other three magnetic path air gaps are arranged at contact positions of the other sides of the three transverse yokes of the Chinese character 'Wang'-shaped core and the I-shaped core. The interleaved magnetic integration type coupling inductor provided by the invention has the beneficial effects in that the coupling inductor is used for inductive coupling integration; the quantity of the air gaps is increased for one time; the length of the air gaps is reduced for a half; the diffusion flux of the air gaps can be obviously reduced; energy and materials can be saved; and the electromagnetic interference is reduced.
Owner:杨玉岗
EMI filter module based on magnetic integration
InactiveCN101860337AImprove performance and stabilityReduce the temperatureMultiple-port networksInductance with magnetic coreCapacitanceDielectric
The invention discloses an EMI filter module based on magnetic integration, which comprises a magnetic core, a common-mode inductance layer, a common-mode integrated inductance-capacitance structure, a leakage inductance layer and a differential-mode capacitor. The differential-mode capacitor is a laminated capacitor, and the common-mode inductance layer consists of a single-layer plane spiral coil. Since the laminated capacitor is used as the differential-mode capacitor, the invention reduces the requirements for the dielectric material in the differential-mode capacitor, and the dielectric material with good temperature, high frequency sensitivity but low dielectric constant can be used, thereby solving the problems of high temperature and high frequency due to the use of the material with the high dielectric constant in the prior art, and improving the performance stability of the EMI filter module; and since the single-layer spiral coil is used as the common-mode inductance layer, the invention reduces the size of the EMI filter module.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Magnetism-integrated double decompression semi-bridge converter
This invention provides one magnetic double lowering semi-bridge inverter, which comprises inverter first arm, second arm, and magnetic couple induction composed of first and second couple filter induction. This invention adopts magnetic integration technique to roll magnetic parts into one common core through couple means and parameters setting to reduce parts volume and consumption.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Three-port convertor having integrated magnetic and zero-port current ripple
ActiveUS20180241243A1Simple structureSize andBatteries circuit arrangementsApparatus with intermediate ac conversionRipple cancellationMagnetic integration
The present invention provides a three-port converter with magnetic integration and current ripple cancellation. With magnetic integration technology, the number of magnetic rings is reduced, and the number of driving coupling transformers is also reduced, thereby greatly reducing the size and weight of the whole converter; and with a current ripple cancellation branch, the amount of current ripples flowing through the three ports is very low and close to zero. The three-port converter of the present invention reduces the influence of electromagnetic interference and simultaneously saves the filter cost so that the busbar current and battery current are smoother.
Owner:SHENZHEN AEROSPACE NEW POWER TECH
Hybrid distribution transformer decoupling magnetic integration device
ActiveCN106783107AReduce the numberImprove the utilization of electromagnetic capacityTransformersTransformers/inductances coils/windings/connectionsElectromagnetic couplingDistribution transformer
The invention discloses a hybrid distribution transformer decoupling magnetic integration device. The hybrid distribution transformer decoupling magnetic integration device comprises a pair of iron cores and three sets of windings wound on the pair of iron cores, wherein the iron cores are composed of iron yokes, branched magnetic iron cores and iron core limbs which correspond to the three sets of windings respectively; the three sets of windings comprise main transformer windings concentrically wound on the middle iron core limb, isolation transformer windings concentrically wound on the upper iron core limb and the lower iron core limb after being split, and series converter output filter inductors and parallel converter output filter inductors which are concentrically wound on the upper iron core limb, the lower iron core limb and the middle iron core limb. Separated magnetic pieces in a hybrid distribution transformer scheme are integrated on a pair of symmetric iron cores through an integrated design, so that the quantity of the separated magnetic pieces adopted in the hybrid distribution transformer is sufficiently decreased. In virtue of the symmetry of the iron core structures, the electromagnetic coupling among the windings is eliminated by adopting a method including winding splitting, magnetic flux reverse offsetting and provision of the branched magnetic iron cores, rich control functionality of an original hybrid distribution transformer is guaranteed, and the device has important practical values for realizing the integrated design of the hybrid distribution transformer.
Owner:XI AN JIAOTONG UNIV
Transformer and inductance magnetic integration structure
InactiveCN110581003AReduce size and weightImprove power densityTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresMagnetic integrationResonant converter
The invention discloses a transformer and an inductance magnetic integration structure, and belongs to the technical field of power electronics. The transformer inductance magnetic integration structure is composed of a pair of magnetic cores including at least four magnetic columns, a primary winding and a secondary winding. One transformer and two inductors can be integrated in one magnetic core, flexible configuration of the winding structure can also be realized, any transformer turn ratio, any excitation inductance and leakage inductance ratio can be realized and the magnetic core loss can also be reduced and the efficiency can be improved. Meanwhile, the integrated structure greatly reduces the volume and the weight of power magnetic parts so as to be helpful to improve the power density of the converter. The structure is particularly suitable for various applications such as bidirectional CLLC resonant converters and the like where transformers and inductors are used for high-frequency, high-efficiency and high-power density power conversion.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Magnetism integration DC/DC conversion boosting type transmission ratio expander circuit and high booster circuit
InactiveCN1595778AAchieve magnetic integrationApparatus without intermediate ac conversionMagnetic integrationElectrical polarity
The invention is a magnetic integrated DC / DC conversion boost transmission ratio extension circuit and a high boost transmission ratio circuit, and as realizing the stage extension of a boost-type transmission ratio extension two-port network from stage n to n+1, the inductance and diode regularly increase by degrees, i.e. adding an inductance and three diodes can realize the extension from the stage n to n+1; the DC / DC conversion boost transmission ratio extension circuit with extended stage number n (2<=n<=500) is applied to a traditional boost converter, which composes a like-polarity high boost transmission ratio circuit, where the transmission ratio M=n / (1-D); and as the DC / DC conversion boost transmission ratio extension circuit with extended stage number n (2<=n<=500) is applied to a traditional buck-boost converter, which composes a reversed-polarity high boost transmission ratio circuit, where the transmission ratio M=-(nD) / (1-D); it can realize the magnetic integration of many inductances in a boost transmission ratio extension circuit by adopting magnetic integrated multi-winding coupled inductance.
Owner:YANSHAN UNIV
Ferrite material NiCuZn with large current-resistant property and low-temperature sintering property and preparation method thereof
The invention belongs to the technical fields of electronic ceramic materials and preparation thereof, and particularly relates to a ferrite material NiCuZn with large magnetic field-resistant property and low-temperature sintering property and a preparation method thereof. An expression formula of a molecule structure of the ferrite material NiCuZn is Ni0.27Zn0.5Cu0.18Co0.05Fe1.95O4. On the basisof the formula of the ferrite material NiCuZn, the pre-firing materials of 1wt% of Bi2O3 (bismuth trioxide) and 2.5 to 3.5wt% of Zn2SiO4 (zinc silicate) are combined and doped. The studied material can be sintered at low temperature of 900 DEG C, and the initial magnetic conductivity mu i is 65.3 to 70.4; the large magnetic field-resistant property H70% is 1140 to 965A / m, the quality factor at the frequency range of 6MHz to 18MHz exceeds 100, the highest quality factor exceeds 130, and the comprehensive magnetic property is very excellent. The ferrite material NiCuZn has the advantages that the comprehensive requirements of higher initial magnetic conductivity, large magnetic field-resistant property and high quality factor of the ferrite material with low-temperature sintering property are well met, the cost of the production raw materials is low, the technology is simple, the operation is convenient, and the cost is low; the ferrite material NiCuZn can be widely applied into laminated sheet type power inductors, magnetic beads, transformers and other magnetic integration modules.
Owner:江西国创产业园发展有限公司
Charging station system for new-energy automobiles
ActiveCN107284257AExtended service lifeReduce harmonic currentCharging stationsIndicating/monitoring circuitsNew energySolar power
The invention discloses a charging station system for new-energy automobiles. The charging station system comprises direct-current bus, a plurality of charging piles, a first man-machine operation module, a second man-machine operation module, a data collecting module, a video collecting module, a central processor, a predicting and analyzing module and an expert evaluation module, wherein the input end of the direct-current bus is connected with a power supply system, and the charging piles are hung to the direct-current bus; at least two carbon-based capacitor battery packs which work in a synchronous and same-phase manner, a coupling magnetic integration inductor, at least one power supply voltage isolation rectifying device and at least one power switch conversion component are arranged in each charging pile. The charging station system has the advantages that charging pile conditions can be monitored and analyzed in real time, the balance of output currents among parallel power supplies is guaranteed, current sharing is achieved, the service life of the charging piles is prolonged, power system stability is achieved, the harmonic currents of the charging piles are reduced, the carbon-based capacitor battery packs are coordinated with wind-driven and solar power generating system, and the market requirements of energy conservation and emission reduction are satisfied.
Owner:FUJIAN UNIV OF TECH
Isolated type bridgeless electrolytic-capacitor-free low-ripple-wave constant-current power supply of LED lamp
InactiveCN104284480AImprove power efficiencyImprove power factor PF valueElectric light circuit arrangementCapacitanceAlternating current
The invention discloses an isolated type bridgeless electrolytic-capacitor-free low-ripple-wave constant-current power supply of an LED lamp. The isolated type bridgeless electrolytic-capacitor-free low-ripple-wave constant-current power supply of the LED lamp comprises an alternating-current power supply circuit, a start and power supply circuit, a coupling-out circuit and a ripple wave restraining circuit. The alternating-current power supply circuit comprises an alternating-current positive half-wave current loop and an alternating-current negative half-wave current loop. The current of the alternating-current positive half-wave current loop and the alternating-current negative half-wave current loop both flow through a primary winding N11 and a primary winding N12 of a magnetic integration transformer TR so that an induced secondary current can be generated on a center post secondary winding N2 of the magnetic integration transformer TR. The start and power supply circuit comprises a start and power supply circuit body of a constant-current drive chip U1 and a constant-current drive chip U2. The induced secondary current is rectified and filtered and then is output to the load, the LED lamp, by the coupling-out circuit. The ripple wave restraining circuit recycles harmonic waves THD and electromagnetic interference EMI, and the harmonic waves THD and the electromagnetic interference EMI are output to the load, the LED lamp, through rectification. The constant-current drive chip U1 and the constant-current drive chip U2 are DU8673 integrated chips. According to the isolated type bridgeless electrolytic-capacitor-free low-ripple-wave constant-current power supply of the LED lamp, a bridge rectifier is not adopted, so that the electric power is increased, an electrolytic capacitor is not adopted, so that the reliability is improved, the constant-current precision is high, the current ripple waves are small, the LED does not flicker, and the circuits are environmentally friendly.
Owner:SHANGHAI ZHANKONGBI ELECTRONICS TECH +5
Structuring method of novel matrix form coupling inductor with multiple degrees of freedom
InactiveCN107180697ASimple structureVersatilityTransformersTransformers/inductances coils/windings/connectionsMagnetic integrationCoupling
The invention discloses a structuring method of a novel matrix form coupling inductor with multiple degrees of freedom. The coupling inductor comprises a plurality of matrix form coupling inductance units, wherein each coupling inductance unit comprises a self-induction unit inductor and a mutual induction unit inductor, and the self-induction unit inductor is formed by forwardly integrating two windings on a single magnetic core; the mutual induction unit inductor is formed by reversely coupling two windings on a single magnetic core; and the coupling inductance units realize magnetic integration among a plurality of windings through array-formed permutation and combination and circuit connection. Due to adoption of a matrix form structure, the coupling inductor designed by the invention can greatly increase the heat radiating area of the magnetic cores and reduce the thermal loss of the magnetic cores, and also has structural universality and expansibility; the number of the magnetic cores of the coupling inductance units can be increased for randomly expanding the phase number of the coupling inductor; and in a full duty ratio working mode, the steady-state output waveform of the VRM of the coupling inductor is smooth and few in burrs, so the coupling inductor has stable output capability.
Owner:LIAONING TECHNICAL UNIVERSITY
Alternating current and direct current coupling integrated EMI filter for motor driving system
ActiveCN111446902AMiniaturizationReduce the numberElectric motor controlTransformers/inductances coils/windings/connectionsCapacitanceInductor windings
The invention provides an alternating-current and direct-current coupling integrated EMI filter for a motor driving system. The filter comprises a metal shell (1), a common-mode inductor (2) and a capacitor PCB (3), and is supported, mounted and insulated through a first dielectric plate (4) and a second dielectric plate (5). The common-mode inductor (2) comprises two layers of nanocrystalline magnetic ring groups (21), a horizontal winding printing plate (22) and a vertical winding copper bar (23) which form five windings of the common-mode inductor (2) together. Compared with the prior art,by using the filter of the invention, two common-mode inductor windings connected in series in a single-phase positive bus and a single-phase negative bus and three common-mode inductor windings connected in series in a three-phase alternating-current phase line are encircled on the same magnetic core group so that coupling of the alternating-current inductor and the direct-current inductor is realized, and two common-mode inductors in the prior art are integrated into one magnetic element in a magnetic integration manner; and the number of elements in the EMI filter is reduced, and miniaturization of the EMI filter is realized.
Owner:XIDIAN UNIV +1
Isolated single-level double-Sepic inverter based on magnetic integration
InactiveCN102832838ARealize the buck-boost functionWith buck-boost functionDc-dc conversionElectric variable regulationNew energyMagnetic integration
The invention discloses an isolated single-level double-Sepic inverter based on magnetic integration. The inverter comprises an input end 1 of an isolated Sepic circuit, an output end 2 of a first isolated Sepic circuit and an output end 3 of a second isolated Sepic circuit. A single-grade and single-phase inverter which can realize voltage increase and reduction inversion is built through two isolated Sepic convertors in an output parallel way, the integration of a plurality of magnetic elements of the inverter is realized through magnetic integration technology. The Sepic convertors in the circuit have voltage increasing and reducing functions, so that the input / output range is further expanded through the transmission rate of a high-frequency transformer, the requirement of wide input voltage range of a photovoltaic inverter can be met, and a voltage increase and reduction inversion function can be realized. The inverter is a novel inverter which meets the technical requirements of power generation from renewable energy sources and new energy sources and is suitable for occasions requiring a wide input voltage range and medium power.
Owner:YANSHAN UNIV
Transformer magnetic integration structure integrating leakage inductance and excitation inductance and integration method thereof
ActiveCN112687454AA large amountReduce volumeEfficient power electronics conversionTransformers/inductances coils/windings/connectionsMagnetic integrationEngineering
The invention discloses a transformer magnetic integration structure integrating leakage inductance and excitation inductance and an integration method of the transformer magnetic integration structure, and belongs to the high-frequency isolation switch power supply direction in the field of power electronics. In order to overcome the related problems of non-standard magnetic core structure or low magnetic core volume utilization rate, complex design, limitation in popularization and application and the like in the common magnetic integration method, two standard UI magnetic cores are used for a common converter containing three magnetic element structures of leakage inductance, excitation inductance and a transformer; by reasonably designing a winding connection mode and parameters, integration among leakage inductance, excitation inductance and a transformer is realized, and compared with discrete magnetic elements, the number of the magnetic elements of the converter can be reduced, the volume proportion occupied in the converter is reduced, the volume of a converter system is further reduced, and the power density is improved as an important index. Efficient and high-power-density operation of the system is achieved, and the flexibility and reliability of operation are improved.
Owner:CENT SOUTH UNIV
Permanent-magnet DC fan cluster system topological structure
ActiveCN106711992AAdditional insulation requirements for increased electrical withstand voltage levelsDoes not affect operationClimate change adaptationSingle network parallel feeding arrangementsFault toleranceInsulation Problem
The invention provides a permanent-magnet DC fan cluster system topological structure, which comprises a plurality of permanent-magnet DC fan parallel branches, wherein each permanent-magnet DC fan parallel branch comprises a plurality of permanent magnet DC fan assemblies connected in parallel. The plurality of permanent-magnet DC fan parallel branches are connected in parallel to form a close-loop structure. Each permanent magnet DC fan assembly outputs a high-voltage direct current. The close-loop structure is provided with a high-voltage DC convergence point. For the defects of complex DC fan series-parallel control and difficult fault processing, magnetic-integration high-frequency transformers and high-frequency high-voltage rectifiers are utilized to solve the problems of high-voltage direct current generated by each DC fan, the multi-fan cluster system topological structure and fault tolerance, thereby preventing the problem of extra electrical insulation due to series connection of the DC fans, and overcoming the problem of fan power distribution and complex voltage stability control due to different wind speeds or fault.
Owner:SHANGHAI JIAO TONG UNIV
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