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公开(公告)号：US10673279B2
公开(公告)日：2020-06-02
申请号：US15324699
申请日：2015-07-08
摘要： An inductive power transfer apparatus may be used for producing or receiving a magnetic field for inductive power transfer. The apparatus has a central coil and two end coils, one of the end coils being provided at each end of the central coil. Some turns of each of the end coils are on one side of the central coil and the remaining turns are on the other side. The end coils act to weaken or cancel flux on one side of the central coil and guide magnetic flux through the central coil to provide an arch shaped flux pattern beyond the apparatus on the other side of the central coil.
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公开(公告)号：US10305393B2
公开(公告)日：2019-05-28
申请号：US15021440
申请日：2014-09-10
摘要： This invention relates to current-fed resonant inverters for electrical power applications to change direct current (DC) into alternating current (AC). One application of the invention is to power supplies for inductive power transfer (IPT) systems. There is provided a resonant inverter including an input for supply of current from a DC power source, a resonant circuit including two coupled inductive elements and a tuning capacitance, the inductive elements being arranged to split current from the power source; a first switching means comprising two switching devices operable in substantially opposite phase to alternately switch current from the power source into the inductive elements; and a second switching means to selectively switch one or more control capacitances into or out of the resonant circuit dependent on a power factor of the resonant circuit.
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公开(公告)号：US10079510B2
公开(公告)日：2018-09-18
申请号：US15106642
申请日：2014-12-19
摘要： An inductive power transfer (IPT) pick-up circuit has a full-wave rectifier (D1-D4) coupled to a resonant circuit (L1 C1) and adapted to rectify an AC current received from the resonant circuit. A pair of inductors (L2 L3) are provided, being arranged to couple the rectifier to an output (VLoad) of the pick-up circuit and alternately store and release energy to the output.
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公开(公告)号：US09747792B2
公开(公告)日：2017-08-29
申请号：US14441682
申请日：2013-11-12
发明人： John Talbot Boys
CPC分类号： G08G1/056 , B60L11/182 , B60L11/1824 , B60L11/1829 , B60L11/1831 , B60L2270/147 , H01F38/14 , H02J7/025 , H02J17/00 , H02J50/10 , H02J50/40 , H02J50/60 , H02J50/90 , H04B5/0037 , H04B5/0043 , Y02T10/7005 , Y02T10/7072 , Y02T90/12 , Y02T90/121 , Y02T90/122 , Y02T90/125 , Y02T90/14
摘要： The present application relates to the detection of moving vehicles and other objects, in particular though not exclusively for the application of switching stationary charging pads for moving electric vehicle charging. There is provided an electric vehicle detecting apparatus for switching a charging pad for charging a vehicle transmitting a locating signal, the apparatus comprising two sensors separated in the direction of travel of the vehicle, and a detector arranged to detect the vehicle by comparing the locating signals received by each of the two sensors.
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公开(公告)号：US20160049232A1
公开(公告)日：2016-02-18
申请号：US14780102
申请日：2014-03-27
摘要： The present application invention relates to the control of electromagnetic fields. It has particular relevance to magnetic flux coupling apparatus such as inductive power transfer pads for wireless power transfer systems. There is provided a magnetic flux coupling apparatus comprising a coil for generating or receiving magnetic coupling flux and a leakage flux element comprising material of a relatively high magnetic permeability. The leakage flux element is separated from the coil by a region of relatively low magnetic permeability and positioned to provide a controlled path for leakage flux independent of coupling flux. There is provided an electromagnetic wave absorber comprising a high permeability magnetic material arranged in a first layer; and a conductive or low permeability material arranged in a second layer.
摘要翻译： 本发明涉及电磁场的控制。 它与诸如用于无线功率传输系统的感应功率传输焊盘的磁通耦合装置特别相关。 提供了一种磁通耦合装置，其包括用于产生或接收磁耦合通量的线圈和包括相对高磁导率的材料的漏磁通元件。 漏磁通元件通过磁导率相对较低的区域与线圈分离，并且定位成提供独立于耦合通量的漏磁通的受控路径。 提供了一种包括布置在第一层中的高磁导率磁性材料的电磁波吸收体; 以及布置在第二层中的导电或低磁导率材料。
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公开(公告)号：US11342598B2
公开(公告)日：2022-05-24
申请号：US16277364
申请日：2019-02-15
IPC分类号： H01M10/46 , B62H3/00 , B62M6/40 , H01Q7/06 , H01Q7/08 , B60L53/122 , B60L53/124 , B60L53/126
摘要： An inductive charging apparatus includes a primary conductor with at least one node for creating a magnetic field and at least one intermediate resonant circuit including a first coil for receiving inductive power from the node, a second coil operable in use to be driven by current from the first coil to generate a magnetic field for power transfer, and a tuning capacitor coupled to the first and second coils for resonance therewith.
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公开(公告)号：US10573445B2
公开(公告)日：2020-02-25
申请号：US14780102
申请日：2014-03-27
IPC分类号： H01F7/20 , B32B15/18 , H02J50/70 , H02J50/10 , H01F38/14 , H01F27/34 , B32B15/20 , H01Q17/00
摘要： The present subject matter relates to the control of electromagnetic fields and has particular relevance to wireless power transfer system devices and systems. In particular there is provided a magnetic flux coupling apparatus comprising a coil for generating or receiving magnetic coupling flux; and a leakage flux element separated from the coil by a region of relatively low magnetic permeability and positioned to provide a controlled path for leakage flux independent of coupling flux; wherein the leakage flux element comprises a lossy magnetic material of relatively high magnetic permeability which absorbs energy from a time varying magnetic field to thereby alternate attenuate leakage flux. The apparatus as disclosed herein aids in the suppression of the magnetic flux that leaks out of the air gap in such systems, or which leaks out of a region where magnetic flux is required for inductive power transfer.
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公开(公告)号：US10411613B2
公开(公告)日：2019-09-10
申请号：US15902978
申请日：2018-02-22
摘要： An inductive power transfer (IPT) control method is disclosed for controlling the output of an IPT pick-up. The invention involves selectively shunting first and second diodes of a diode bridge to selectively rectify an AC current input for supply to a load, or recirculate the AC current to a resonant circuit coupled to the input of the controller. By controlling the proportion of each positive-negative cycle of the AC input which is rectified/recirculated, the output is regulated. Also disclosed is an IPT controller adapted to perform the method, an IPT pick-up incorporating the IPT controller, and an IPT system incorporating at least one such IPT pick-up.
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公开(公告)号：US20190036348A1
公开(公告)日：2019-01-31
申请号：US16077219
申请日：2017-02-10
摘要： The present invention relates to a current multiplier primarily in the field of power conversion. The invention relates to a controlled current multiplier with a resonant winding to assist with, for example, power conversion. In particular, but not solely, the invention may broadly consist in a current multiplier comprising: a primary winding associated with a power source; a secondary winding associated with a load; a resonant winding associated with a capacitance; and a control means for controlling an output of the secondary winding to the load, the control means associated with the primary or resonant winding. This allows, for instance, control of the high current output to be placed on a low current winding.
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公开(公告)号：US10106046B2
公开(公告)日：2018-10-23
申请号：US15371788
申请日：2016-12-07
IPC分类号： B60L11/18 , H01F5/00 , H02J50/70 , H02J50/10 , H01F38/14 , H02J5/00 , H02J7/00 , H02J7/02 , H02J50/90 , H01F27/36
摘要： An apparatus for charging a battery, the apparatus including a first power transfer coupling arranged to selectively couple to the battery to charge at a high power transfer rate and a second power transfer coupling arranged to selectively couple to the battery to charge at a lower power transfer rate, wherein the second power transfer coupling comprises a pickup pad electrically coupled to the battery, wherein power is transferred to the pickup pad from a charging pad by inductive power transfer.
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