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公开(公告)号：US20190081516A1
公开(公告)日：2019-03-14
申请号：US15875127
申请日：2018-01-19
Applicant: Apple Inc.
Inventor： Behrooz Shahsavari , Weiyu Huang , Sneha Kadetotad , Baboo V. Gowreesunker , Jacob Mattingley
Abstract: A wireless power transmission system has a wireless power receiving device that is located on a charging surface of a wireless power transmitting device. The wireless power receiving device has a wireless power receiving coil and the wireless power transmitting device has a wireless power transmitting coil array. Signal measurement circuitry coupled to the coil array may make measurements while the control circuitry uses the inverter circuitry to apply excitation signals to each of the coils. Foreign objects on the coil array such as metallic objects without wireless power receiving coils can be detected using foreign object detection. When multiple wireless power receiving devices are present on the wireless power transmitting device, steps may be taken to isolate measurements from the coils associated with each wireless power receiving device. Foreign object detection may then be performed on these modified measurements.
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Patent Agency Ranking
公开(公告)号：US20190074722A1
公开(公告)日：2019-03-07
申请号：US15875418
申请日：2018-01-19
Applicant: Apple Inc.
Inventor： Behrooz Shahsavari , Weiyu Huang , Sneha Kadetotad , Baboo V. Gowreesunker
Abstract: A wireless power transmission system has a wireless power receiving device with a wireless power receiving coil that is located on a charging surface of a wireless power transmitting device with a wireless power transmitting coil array. Control circuitry in the wireless power transmitting device may use inverter circuitry to supply alternating-current signals to coils in the coil array, thereby transmitting wireless power signals. The control circuitry may also be used to detect foreign objects on the coil array such as metallic objects without wireless power receiving coils. For example, control circuitry may use inductance measurements from the coils in the coil array to identify segments of the coil array that correspond to potential wireless power receiving devices. The control circuitry may control wireless power transmission based on a comparison between the number of identified segments corresponding to potential wireless power receiving devices and a number of received device-identifiers.
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公开(公告)号：US10797534B2
公开(公告)日：2020-10-06
申请号：US15875127
申请日：2018-01-19
Applicant: Apple Inc.
Inventor： Behrooz Shahsavari , Weiyu Huang , Sneha Kadetotad , Baboo V. Gowreesunker , Jacob Mattingley
Abstract: A wireless power transmission system has a wireless power receiving device that is located on a charging surface of a wireless power transmitting device. The wireless power receiving device has a wireless power receiving coil and the wireless power transmitting device has a wireless power transmitting coil array. Signal measurement circuitry coupled to the coil array may make measurements while the control circuitry uses the inverter circuitry to apply excitation signals to each of the coils. Foreign objects on the coil array such as metallic objects without wireless power receiving coils can be detected using foreign object detection. When multiple wireless power receiving devices are present on the wireless power transmitting device, steps may be taken to isolate measurements from the coils associated with each wireless power receiving device. Foreign object detection may then be performed on these modified measurements.
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公开(公告)号：US20190074730A1
公开(公告)日：2019-03-07
申请号：US15875287
申请日：2018-01-19
Applicant: Apple Inc.
Inventor： Behrooz Shahsavari , Sneha Kadetotad , Weiyu Huang , Baboo V. Gowreesunker
Abstract: A wireless power transmission system has a wireless power receiving device with a wireless power receiving coil that is located on a charging surface of a wireless power transmitting device with a wireless power transmitting coil array. Control circuitry in the wireless power transmitting device may use inverter circuitry to supply alternating-current signals to coils in the coil array, thereby transmitting wireless power signals. The control circuitry may also be used to detect foreign objects on the coil array such as metallic objects without wireless power receiving coils. For example, control circuitry may use inductance measurements from the coils in the coil array to determine a probability value indicative of whether a foreign object is present on the charging surface. The control circuitry may compare the probability value to a threshold and take suitable action in response to the comparison.
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公开(公告)号：US11025098B2
公开(公告)日：2021-06-01
申请号：US15875287
申请日：2018-01-19
Applicant: Apple Inc.
Inventor： Behrooz Shahsavari , Sneha Kadetotad , Weiyu Huang , Baboo V. Gowreesunker
IPC: H02J50/60 , H02J7/02 , H02J50/12 , G08B21/18 , G06K9/62 , G01R27/26 , H01F38/14 , H04B5/00 , G08B3/10 , G08B5/22
Abstract: A wireless power transmission system has a wireless power receiving device with a wireless power receiving coil that is located on a charging surface of a wireless power transmitting device with a wireless power transmitting coil array. Control circuitry in the wireless power transmitting device may use inverter circuitry to supply alternating-current signals to coils in the coil array, thereby transmitting wireless power signals. The control circuitry may also be used to detect foreign objects on the coil array such as metallic objects without wireless power receiving coils. For example, control circuitry may use inductance measurements from the coils in the coil array to determine a probability value indicative of whether a foreign object is present on the charging surface. The control circuitry may compare the probability value to a threshold and take suitable action in response to the comparison.
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公开(公告)号：US10236725B1
公开(公告)日：2019-03-19
申请号：US15875418
申请日：2018-01-19
Applicant: Apple Inc.
Inventor： Behrooz Shahsavari , Weiyu Huang , Sneha Kadetotad , Baboo V. Gowreesunker
Abstract: A wireless power transmission system has a wireless power receiving device with a wireless power receiving coil that is located on a charging surface of a wireless power transmitting device with a wireless power transmitting coil array. Control circuitry in the wireless power transmitting device may use inverter circuitry to supply alternating-current signals to coils in the coil array, thereby transmitting wireless power signals. The control circuitry may also be used to detect foreign objects on the coil array such as metallic objects without wireless power receiving coils. For example, control circuitry may use inductance measurements from the coils in the coil array to identify segments of the coil array that correspond to potential wireless power receiving devices. The control circuitry may control wireless power transmission based on a comparison between the number of identified segments corresponding to potential wireless power receiving devices and a number of received device-identifiers.
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