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64 条记录 (耗时 0.021 秒)

    Foreign object detection circuit using mutual impedance sensing
    1.
    发明授权
    Foreign object detection circuit using mutual impedance sensing 有权

    公开(公告)号：US11815644B2

    公开(公告)日：2023-11-14

    申请号：US18059280

    申请日：2022-11-28

    申请人： WiTricity Corporation

    发明人： Hans Peter Widmer ,  Lukas Sieber

    IPC分类号： G01V3/10 ,  H02J50/12 ,  H02J50/60

    CPC分类号： G01V3/104 ,  H02J50/12 ,  H02J50/60

    摘要： The present disclosure describes techniques for detecting foreign objects. In some aspects, an apparatus for detecting objects is provided. The apparatus includes a plurality of sense circuits, each of the plurality of sense circuits including a primary sense coil having a first terminal and a second terminal, a secondary sense coil having a first terminal and a second terminal, and a capacitor having a first terminal and a second terminal. The first terminal of the capacitor is electrically connected to the second terminals of each of the primary sense coil and the secondary sense coil. The apparatus further includes a driver circuit electrically connected to the first terminal of the primary sense coil of each of the plurality of sense circuits. The apparatus further includes a measurement circuit electrically connected to the first terminal of the secondary sense coil of each of the plurality of sense circuits.

    Extended Foreign Object Detection Signal Processing
    4.
    发明申请
    Extended Foreign Object Detection Signal Processing 有权

    公开(公告)号：US20220085664A1

    公开(公告)日：2022-03-17

    申请号：US17538773

    申请日：2021-11-30

    申请人： WiTricity Corporation

    发明人： Andreas Daetwyler ,  Hans Peter Widmer ,  Lukas Sieber ,  Martin Ludwig Weber

    IPC分类号： H02J50/60 ,  H02J50/40 ,  H02J50/90 ,  H02J50/12

    摘要： Systems and methods are described for extended foreign object detection (FOD) signal processing. In aspects, an oscillator reset is implemented in a FOD system to mitigate the effects of intermodulation products. In addition, dynamic frequency allocation is implemented to avoid high noise desensitizing the FOD system. Also, a slow sampling mode is implemented to increase a tolerance to transient foreign objects. Reference tracking and auto-recovery is implemented to bridge power outages. Additionally, the FOD system is configured to support position finding for determining an alignment between the vehicle pad and the base pad using a passive beacon transponder circuit and to perform beacon response cancellation as needed in concurrent FOD operation.

    Foreign object detection circuit using current measurement
    5.
    发明授权
    Foreign object detection circuit using current measurement 有权

    公开(公告)号：US11046193B2

    公开(公告)日：2021-06-29

    申请号：US16226156

    申请日：2018-12-19

    申请人： WiTricity Corporation

    发明人： Lukas Sieber ,  Hans Peter Widmer ,  Mircea-Florian Vancu ,  Andreas Daetwyler

    IPC分类号： B60L53/124 ,  H02J50/12 ,  H02J50/60 ,  G01V3/10 ,  B60L53/12 ,  G01R19/00

    摘要： The present disclosure describes techniques for detecting foreign objects by detecting changes in an electrical characteristic of an array of sense elements for detection objects based on a current measurement approach. In some aspects, an apparatus for measuring changes in current for detecting objects is provided. The apparatus includes a plurality of sense circuits each comprising a sense coil, the plurality of sense circuits each electrically connected to a common output node. The apparatus further includes a driver circuit electrically connected to the plurality of sense circuits and configured to operate as a voltage source and selectively apply a voltage signal at an operating frequency to each of the plurality of sense circuits. The apparatus further includes a current measurement circuit electrically connected to the common output node. The current measurement circuit is configured to provide a measurement output proportional to an electrical current at the common output node.

    Extended foreign object detection signal processing
    8.
    发明授权
    Extended foreign object detection signal processing 有权

    公开(公告)号：US11513250B2

    公开(公告)日：2022-11-29

    申请号：US17538842

    申请日：2021-11-30

    申请人： WiTricity Corporation

    发明人： Andreas Daetwyler ,  Hans Peter Widmer ,  Lukas Sieber ,  Martin Ludwig Weber

    IPC分类号： G01V3/10 ,  H02J50/60 ,  H02J50/90 ,  H02J50/12

    摘要： Systems and methods are described for extended foreign object detection (FOD) signal processing. In aspects, an oscillator reset is implemented in a FOD system to mitigate the effects of intermodulation products. In addition, dynamic frequency allocation is implemented to avoid high noise desensitizing the FOD system. Also, a slow sampling mode is implemented to increase a tolerance to transient foreign objects. Reference tracking and auto-recovery is implemented to bridge power outages. Additionally, the FOD system is configured to support position finding for determining an alignment between the vehicle pad and the base pad using a passive beacon transponder circuit and to perform beacon response cancellation as needed in concurrent FOD operation.

    Wireless network pairing for wireless electric vehicle charging
    9.
    发明授权
    Wireless network pairing for wireless electric vehicle charging 有权

    公开(公告)号：US11452028B2

    公开(公告)日：2022-09-20

    申请号：US17128490

    申请日：2020-12-21

    申请人： WiTricity Corporation

    发明人： Markus Bittner ,  Lukas Sieber ,  Hans Peter Widmer

    IPC分类号： H04W48/08 ,  H04W60/04 ,  H04W72/04 ,  B60L53/126 ,  H04W36/00

    摘要： A vehicle is paired to a selected wireless charging station of a plurality of wireless charging stations by joining the vehicle to a first wireless network provided by a central access point, assigning a channel to use for pairing the vehicle to the selected wireless charging station by a network manager, transmitting a channel identifier to the vehicle over the first wireless network, and transmitting the channel identifier to the plurality of wireless charging stations. The vehicle then configures a beacon device coupled to the vehicle to use the assigned channel and moves into proximity of the selected wireless charging station. The selected wireless charging station detects a beacon signal of the beacon device, confirms that the beacon signal is using the identified channel, and transmits information identifying a second wireless network to the vehicle. The vehicle can then join the second wireless network using the transmitted information.