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公开(公告)号：US20230361687A1
公开(公告)日：2023-11-09
申请号：US18312611
申请日：2023-05-05
发明人： Hugues NJIENDE
CPC分类号： H02M3/33584 , H01F27/38 , H02M1/0064 , B60L53/20 , B60L2210/10
摘要： The present disclosure provides a bidirectional LLC resonant converter and an integrated magnetic component for such a bidirectional LLC resonant converter. In order to increase the power density of such a converter, the I cores of the corresponding conventional converter are removed and the remaining windings (P1, S1, Lr1, Lr2) for the transformer and the series resonant chokes are arranged and connected such that the magnetic fluxes generated in the yokes of the transformer core elements (E3, E4) at least partially compensate each other. In another example, the windings and the core elements of the series resonant chokes are removed as well and the series resonant inductances are implemented by windings air gaps provided between the primary and the secondary windings wound on the transformer core elements.
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公开(公告)号：US20230131711A1
公开(公告)日：2023-04-27
申请号：US18049613
申请日：2022-10-25
发明人： Jonas ENDERLIN , Luca KÖNIG , Ulrich RICHTER
摘要： Provided are a sensor arrangement for a foreign object detection device for a wireless power transfer system, a foreign object detection and a primary part for a wireless power transfer system. The sensor arrangement includes multiple detection cells, each including a sense coil including a winding spirally wound in a plane and having multiple turns. Multiple input leads and one or more output leads are provided such that each detection cell may be connected to a current input and a current output. The sense coil of at least one detection cell includes an outer coil section and an inner coil section arranged inside the outer coil section, where a first distance between an outermost turn of the inner coil section and an innermost turn of the outer coil section is at least twice a largest distance between two turns of the outer coil section.
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公开(公告)号：US20230109971A1
公开(公告)日：2023-04-13
申请号：US17938670
申请日：2022-10-06
发明人： Hugues NJIENDE , Ralf GRIEGER
摘要： The disclosure concerns a magnetic component and a power converter including the same. The magnetic component includes at least one magnetic core, where at least one gap is formed between end surfaces, especially opposing end surfaces, of the magnetic core(s). The magnetic component further includes at least one electrical winding surrounding at least a part of the at least one magnetic core, and a shielding device for shielding fringing fields of the at least one gap. The shielding device includes: a holding unit attached to the at least one magnetic core and/or to the at least one electrical winding in a periphery of the at least one gap; and at least one shield member attached to the holding unit. The at least one shield member is configured to shield gap fringing fields in the periphery of the gap.
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公开(公告)号：US11469616B2
公开(公告)日：2022-10-11
申请号：US16865326
申请日：2020-05-02
发明人： Ulrich Richter
摘要： In a wireless power transfer arrangement (1) power is wirelessly transferred from a primary side (2) to a secondary side (3) across an airgap (8) by means of a primary resonator (6) that generates a magnetic field (9) and a secondary resonator (10) that receives the power by picking up the magnetic field (9). The secondary side (3) includes an output stage (11) that receives the AC power provided by the secondary resonator (10) and generates a DC output (13) to be provided to a load. A current sensing arrangement (18) senses the AC current flowing from the secondary resonator (10) to the output stage (11) and provides a current sense signal (16) to a power transfer controller (15) that controls the power transfer of the wireless power transfer arrangement (1) based on the current sense signal (16). And the current sense signal (16) is provided to a switching controller (20) that controls the switching of a synchronous rectifier of the output stage (11) that converts the AC power (12) provided by the secondary resonator (10) to the DC output (13).
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公开(公告)号：US20220077773A1
公开(公告)日：2022-03-10
申请号：US17464229
申请日：2021-09-01
摘要： An interleaved LLC converter arrangement includes two or more LLC converters for transferring power from an input side to an output side, wherein the two or more LLC converters include a first LLC converter and a second LLC converter connected in parallel on the input side and on the output side and wherein each LLC converter includes a bridge inverter at the input side. For balancing the power transfer among the LLC converters if for example the second LLC converter transfers more power from the input side to the output side than the first LLC converter, each leg of the bridge of the bridge inverter of the first LLC converter is operated with a duty cycle of 0.5 and at least one leg of the bridge of the bridge inverter of the second LLC converter is operated with a duty cycle different from 0.5.
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公开(公告)号：US20210166867A1
公开(公告)日：2021-06-03
申请号：US17107044
申请日：2020-11-30
发明人： Christian KRUMPHOLZ
摘要： A passive, current dependent inductivity (1) comprises a magnetic core (2), windings (3) and at least one bank air gap (4). A saturation region (5) made of magnetic material is arranged between the bank air gap (4) and the windings (3). A magnetic flux path (6) bifurcates into a first path (61) passing through the saturation region (5) and into a second path (62) passing through the bank air gap (4) and bypassing the saturation region (5). The magnetic resistance of the first path (61) is lower than the magnetic resistance of the second path (62) for winding currents below a first saturation current (7a) and whereby the magnetic resistance of the second path (62) is lower than the magnetic resistance of the first path (61) for winding currents above the first saturation current (7a) due to saturation of the saturation region.
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公开(公告)号：US20210066967A1
公开(公告)日：2021-03-04
申请号：US16997805
申请日：2020-08-19
IPC分类号： H02J50/12 , H01F38/14 , H01F27/255
摘要： The invention relates to a resonator of a wireless power transfer system (1), including a magnetic core in the form of an H-core with two yokes and at least one limb (52) connecting the yokes where a winding (53) is wound on the limb (52) of the core. The winding (53) includes a PCB (56.1) on one side of the limb (52) and a PCB (56.2) on another side of the limb (52) where the turns of the coil are formed by traces on the first PCB (56.1) and on the second PCB (56.2) that are connected to each other by soldering pins (57) that are soldered into corresponding holes of the PCBs (56.1, 56.2). The traces on the PCBs (56.1, 56.2) may be provided on a single conductive layer of the PCBs (56.1, 56.2) or the PCBs may be multilayer PBS, where each turn section between two soldering pins (57) on one of the PCBs (56.1, 56.2) may include several strands including one or more traces on one or more conductive layers.
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公开(公告)号：US20200091837A1
公开(公告)日：2020-03-19
申请号：US16569025
申请日：2019-09-12
发明人： Christian KRUMPHOLZ
IPC分类号： H02M7/5387 , H02M1/32 , H03K17/10 , G05F1/46
摘要： The present application relates to a method and a switch control arrangement for controlling a switch (107.1-107.4) of a bridge circuit, where the bridge circuit comprises a first and a second input terminal (102.1, 102.2) for connecting a power source (103), a first branch (104) connected between the first and the second input terminal (102.1, 102.2) and including a first section (108.1) between the first input terminal (102.1) and a centre tap (117.1) and including a second section (108.2) between the centre tap (117.1) and the second input terminal (102.2), where the first section (108.1) includes a first switch (107.1) and the second section (108.2) includes a second switch (107.2). The method comprises the steps of determining a measured value by measuring a current flowing in one of the two sections (108.1, 108.2) or measuring a voltage across one of the two sections (108.1, 108.2) of the first branch (104), carrying out a comparison of the measured value with a threshold and controlling a switching of the first and the second switch (107.1, 107.2) of the first branch (104) in dependency of a result of said comparison.
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公开(公告)号：US20180323720A1
公开(公告)日：2018-11-08
申请号：US15973139
申请日：2018-05-07
发明人： Hugues Douglas Njiende , Osman Erinc , Daniel Ruff
CPC分类号： H02M3/33569 , H01F3/14 , H01F27/24 , H01F27/2823 , H01F27/38 , H02M3/285 , H02M3/337 , H02M2001/0058
摘要： The invention relates to an integrated magnetic component (802) for a power converter including N>=2 LLC converters configured for interleaved operation. The integrated magnetic component (802) includes a first yoke and a second yoke and for each LLC converter a winding carrying leg which comprises a primary winding (820c) and a secondary winding (821c), wherein the primary winding (820c) and the secondary winding (821c) are wound on the respective winding carrying leg. The integrated magnetic component (802) further includes one or more return legs. Herein the winding carrying legs and the one or more return legs are arranged side by side, each leg being magnetically connected to both yokes and the winding carrying legs include a transformer air gap (819) whereas the at least one return leg is air gap free and at least one return leg is arranged between two winding carrying legs.The invention further relates to a power converter including a switching converter stage (811a, 811b, 811c), a rectifier stage (813a, 813b, 813c) and a resonant stage, the resonant stage including N>=2 parallel LLC converters.
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公开(公告)号：US20240283368A1
公开(公告)日：2024-08-22
申请号：US18424895
申请日：2024-01-29
发明人： Jitendra SOLANKI
IPC分类号： H02M3/335
CPC分类号： H02M3/33584
摘要： The application concerns a multi-phase DC/DC-converter, comprising a primary side switching circuit comprising a plurality of primary side switching legs, where each primary side switching leg comprises two or more switch elements; at least one secondary side rectifier circuit each including a plurality of secondary side rectifier legs, where each secondary side rectifier leg includes two or more rectifier elements; a transformer, where the transformer includes a primary side connected to the primary side switching circuit and a secondary side connected to each of the at least one secondary side rectifier circuit; and at least one resonant capacitor network, each connected to the primary side or to the secondary side of the transformer, where each resonant capacitor network includes a plurality of capacitors.
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