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公开(公告)号：US20220399803A1
公开(公告)日：2022-12-15
申请号：US17806085
申请日：2022-06-09
摘要： In order to balance the thermal stress of the switches (S1-S4) of the two legs of an inverter full bridge (4), the driving signals are generated using an up-down counter having a modulation period Tmod of twice the period T of the input voltage (Vin). The up-down counter has a first compare value (41) of D/4 and a second compare value (42) of (2+D)/4, where D is the duty cycle and where the second half bridge is phase shifted by the period T.
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公开(公告)号：US10971997B2
公开(公告)日：2021-04-06
申请号：US16690549
申请日：2019-11-21
发明人： Christian Krumpholz
摘要： A method for providing an output power of a switched mode power converter comprises the steps of determining a block length and, if a set value of the output power is below a first power threshold, preventing a power flow through the converter in each period of the multiphase AC voltage for at least one blocking interval. Each blocking interval has a duration of one block length. The switched mode power converter has a multiphase AC side with a number N of conductors for receiving a multiphase AC voltage. The number N of conductors is at least three. Power flows into the switched mode power converter through a combination of current-carrying conductors. The block length is defined by a time span between two subsequent changes of the combination of the current-carrying conductors.
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公开(公告)号：US10884034B2
公开(公告)日：2021-01-05
申请号：US16181834
申请日：2018-11-06
发明人： Robert Pohlmann , Frank Schafmeister , Rongyuan Li
摘要： According to the invention, a current measurement circuit for providing a measurement signal for a controller for controlling a switching of power switches of a power converter comprises a first current sensing circuit for sensing a first bidirectional current representative of a current through a first power switch of the power converter. The first current sensing circuit is being adapted to provide a first sensing signal indicative of the first bidirectional current. The current measurement circuit further comprises a second current sensing circuit for sensing a second bidirectional current representative of a current through a second power switch of the power converter. The second current sensing circuit is adapted to provide a second sensing signal indicative of the second bidirectional current.
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公开(公告)号：US10855112B2
公开(公告)日：2020-12-01
申请号：US16267094
申请日：2019-02-04
发明人： Ulrich Richter
IPC分类号： H02J50/12 , B60L53/122 , H01F27/245 , H01F27/28 , H01F38/14 , H02J7/02 , H02J50/40 , B60L53/12 , H02J50/70
摘要： In a system for wirelessly transferring power from a primary side across an airgap to a secondary side, the secondary side includes two parallel resonating circuits (27) each including two parallel resonating paths with a series connection of a resonating inductor (28), and a resonating capacitor 29. A rectifier (21) is connected to the output of each resonating path for converting the AC output (12′) of the resonating paths to a DC output (13′). The outputs of the rectifiers (21) are connected in parallel to provide the AC output power (13) to a load such as a battery or the like. Each resonating path further includes a symmetry inductance connected in series to improve current sharing among the resonating paths and to reduce the higher harmonic portion in the resonating paths. For balancing the flux each resonating circuit 27 includes in a preferred embodiment of the invention a symmetry winding (30) wound on the same core as the resonating inductor 28 of that resonating path where all symmetry windings (3) are connected in parallel to ensure optimal flux sharing.
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公开(公告)号：US20200350787A1
公开(公告)日：2020-11-05
申请号：US16865016
申请日：2020-05-01
发明人： Jonas ENDERLIN , Ulrich RICHTER
IPC分类号： H02J50/60 , G01V3/10 , H01F38/14 , H02J50/12 , B60L53/124
摘要： The invention relates to a sensor arrangement (140) for a foreign object detection device which includes a current input (142) and a current output (143), a multitude of detection cells (144.1-144.9), each comprising a sense coil and a capacitive element, forming a resonant tank. The sensor arrangement (140) further has a multitude of inputs leads (148a-148c) and a multitude of output leads (150a-150c), the total number of input and output leads being equal or smaller than the number of detection cells (144.1-144.9). Each detection cell is connected between one of the input leads (148a-148c) and one of the output leads (150a-150c), in a way that each of the detection cells (144.1-144.9) is connected to a different pair of input and output leads (148a-148c, 150a-150c). An input selection circuit (152) allows to selectively establish an electrical connection between the current input (142) and one or more of the input leads (148a-148c) and an output selection circuit to (153) selectively establish an electrical connection between one or more of the output leads (150a-150c) and the current output (143). According to the invention at least one detection cell (144.1-144.9) includes a decoupling element (D1-D9) connected in series to its resonant tank. The invention further relates to foreign object detection device for a wireless power transfer system, a primary part of a wireless power transfer system, a wireless power transfer system and a method for detecting a foreign object.
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公开(公告)号：US20190146014A1
公开(公告)日：2019-05-16
申请号：US16181834
申请日：2018-11-06
发明人： Robert POHLMANN , Frank Schafmeister , Rongyuan Li
摘要： According to the invention, a current measurement circuit for providing a measurement signal for a controller for controlling a switching of power switches of a power converter comprises a first current sensing circuit for sensing a first bidirectional current representative of a current through a first power switch of the power converter. The first current sensing circuit is being adapted to provide a first sensing signal indicative of the first bidirectional current. The current measurement circuit further comprises a second current sensing circuit for sensing a second bidirectional current representative of a current through a second power switch of the power converter. The second current sensing circuit is adapted to provide a second sensing signal indicative of the second bidirectional current. In addition, the current measurement circuit comprises a switching circuit being adapted to provide a first measurement signal based on the first sensing signal, the second sensing signal and a polarity signal representative of a polarity of an input voltage of the power converter, wherein the first measurement signal is indicative of the first bidirectional current during a first time interval and indicative of the second bidirectional current during a third time interval.
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7.发明授权Power adapter for dynamically adjusting output voltage and power supply system with the same 有权电源适配器用于动态调整输出电压和电源系统的相同公开(公告)号：US09535435B2
公开(公告)日：2017-01-03
申请号：US13850933
申请日：2013-03-26
CPC分类号： G05F1/10 , G06F1/266 , H02J7/0072 , H02J7/04 , H02J2007/006 , H02M3/156 , H02M2001/0019 , Y10T307/406
摘要： A power adapter includes a power converting circuit, a current detecting circuit, and a controlling unit. A charging voltage with a constant voltage level is provided by the hub through the connecting ports. The current detecting circuit is used for detecting a load current and outputting a corresponding current detecting signal. The load current is transmitted from the power converting circuit to the hub through the power cable. A look-up table is stored in the controlling unit for recording a relationship between the load current and a voltage drop across an impedance of the power cable. According to the current detecting signal and the look-up table, the controlling unit issues a feedback signal to the power converting circuit. According to the feedback signal, a level of the output voltage is dynamically adjusted to be equal to the sum of the voltage drop and the charging voltage.
摘要翻译： 电源适配器包括电源转换电路，电流检测电路和控制单元。 集线器通过连接端口提供具有恒定电压电平的充电电压。 电流检测电路用于检测负载电流并输出相应的电流检测信号。 负载电流通过电力电缆从电力转换电路传输到集线器。 在控制单元中存储有查找表，用于记录负载电流与电力电缆的阻抗之间的电压降之间的关系。 根据电流检测信号和查找表，控制单元向功率转换电路发出反馈信号。 根据反馈信号，将输出电压的电平动态地调整为等于电压降与充电电压之和。
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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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