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公开(公告)号：US20240348099A1
公开(公告)日：2024-10-17
申请号：US18292648
申请日：2022-09-08
CPC分类号： H02J50/12 , H02J7/0029 , H02J7/0047 , H02J50/80
摘要： This disclosure provides systems, methods and apparatuses for a wireless power transmission apparatus to detect a fault of the wireless power reception apparatus. Various implementations relate generally to fault detection and mitigation in a wireless power system. In some aspects, a transmission (TX) controller of the wireless power transmission apparatus can detect a fault in the wireless power reception apparatus based on power transfer measurements or calculations in the wireless power transmission apparatus. The techniques may enable the wireless power transmission apparatus to detect faults such as an open circuit in the wireless power reception apparatus or a thermostat failure, among other examples. During the transmission of wireless power, the wireless power transmission apparatus may detect the fault and cease the transmission of wireless power.
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公开(公告)号：US20240146123A1
公开(公告)日：2024-05-02
申请号：US18546820
申请日：2022-02-14
摘要： This disclosure provides systems, methods and apparatuses for preventing power transfer in a secondary coil of a wireless power reception apparatus. Some implementations relate generally to the use of one or more switches. In some implementations, the one or more switches may be coupled in series to one or both ends of the secondary coil. The one or more switches may be controlled based on a handshake communication between the wireless power reception apparatus and a compatible wireless power transmission apparatus. The one or more switches may be controlled using bias power from a wireless communication interface that is separate from a power reception circuitry that includes the secondary coil. The one or more switches may disable power transfer in the secondary coil to protect one or more components of the wireless power reception apparatus or to enable measurement of a coupling factor during measurement periods.
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公开(公告)号：US20240094426A1
公开(公告)日：2024-03-21
申请号：US18264662
申请日：2022-02-16
发明人： Viswanathan Kanakasabai , Subbarao Tatikonda , Jayanti Ganesh , Joginder Yadav , Suma Memana Narayana Bhat
摘要： This disclosure provides systems, methods and apparatuses for foreign object detection (FOD) in a wireless power transfer (WPT) system. Some implementations relate generally to the use of detection coils that are excited to measure and compare a differential current through a coil pair that includes at least two detection coils. A foreign object may cause a change in impedance for one or more detection coils compared to one or more other detection coils. By detecting the differential current of the coil pair, a detection apparatus may determine that a foreign object is in proximity to one of the detection coils of the coil pair. This disclosure provides several options for the design, construction, layout, and operations of detection coils to improve foreign object detection.
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公开(公告)号：US20230387727A1
公开(公告)日：2023-11-30
申请号：US18447433
申请日：2023-08-10
发明人： Viswanathan Kanakasabai , Subbarao Tatikonda , Jayanti Ganesh , Joginder Yadav , Suma Memana Narayana Bhat
摘要： This disclosure provides systems, methods and apparatuses for foreign object detection (FOD) in a wireless power transfer (WPT) system. Some implementations relate generally to the use of detection coils that are excited to measure and compare a differential current through a coil pair that includes at least two detection coils. A foreign object may cause a change in impedance for one or more detection coils compared to one or more other detection coils. By detecting the differential current of the coil pair, a detection apparatus may determine that a foreign object is in proximity to one of the detection coils of the coil pair. This disclosure provides several options for the design, construction, layout, and operations of detection coils to improve foreign object detection.
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公开(公告)号：US20230283117A1
公开(公告)日：2023-09-07
申请号：US18006208
申请日：2021-07-16
CPC分类号： H02J50/402 , H02J50/80 , H02J50/90 , H02J7/00714 , H02J50/10
摘要： This disclosure provides systems, methods, and apparatuses for wireless power reception. Various implementations relate generally to a wireless power reception apparatus including multiple secondary coils that receive wireless power from corresponding primary coils of a wireless power transmission apparatus. When a secondary coil receives power form a primary coil, they form a latched coil pair. Initially, the wireless power reception apparatus receives via a number of latched coil pairs. Coil pairs may de-latch as they physically move out of alignment. If one or more coil pairs de-latch, voltage may drop in the latched coil pairs. The wireless power reception apparatus includes a power controller that can detect drops in voltage resulting from de-latching coil pairs. In response, the power controller can modify current drawn from the remaining latched coil pairs. By modifying current drawn from the remaining latched coil pairs, the power controller can avoid system failure.
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公开(公告)号：US11689056B2
公开(公告)日：2023-06-27
申请号：US16616409
申请日：2018-05-21
发明人： Suma Memana Narayana Bhat , Viswanathan Kanakasabai , Arun Kumar Raghunathan , Rahul Bhujade , Satishbabu Bhogineni , Somakumar Ramachandrapanicker
摘要： A transmitting assembly (114, 214, 334) configured to transmit electric power in a universal wireless charging device (102, 200, 302) is presented. The transmitting assembly (114, 214, 334) includes a first coil (116, 216, 316) embedded in a printed circuit board (220) and configured to transmit a first AC voltage signal having a first frequency. Also, the transmitting assembly (114, 214, 334) includes a second coil (118, 218, 318) disposed on the printed circuit board (220) and configured to transmit a second AC voltage signal having a second frequency, wherein the second frequency is different from the first frequency, and wherein the first AC voltage signal having the first frequency and the second AC voltage signal having the second frequency are used to wirelessly charge a plurality of receiver devices (104, 106) having different frequency standards.
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公开(公告)号：US11670449B2
公开(公告)日：2023-06-06
申请号：US17726291
申请日：2022-04-21
摘要： A receiver unit of a wireless power transfer system is presented. The receiver unit includes a main receiver coil, a plurality of auxiliary receiver coils disposed about a central axis of the main receiver coil, and a receiver drive subunit. The receiver drive subunit includes a main converter operatively coupled to the main receiver coil and having a main output terminal. The receiver drive subunit may include a plurality of auxiliary converters operatively coupled to the plurality of auxiliary receiver coils. The plurality of auxiliary converters may be operatively coupled to each other to form an auxiliary output terminal coupled in series to the main output terminal to form a common output terminal. In some implementations, the receiver drive unit may be formed on a substrate of an integrated electronic component. The integrated electronic component may further include a communication subunit and a controller disposed.
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公开(公告)号：US20220224161A1
公开(公告)日：2022-07-14
申请号：US17705782
申请日：2022-03-28
发明人： Viswanathan Kanakasabai , Suma Memana Narayana Bhat , Arun Kumar Raghunathan , Rahul Bhujade , Satishbabu Bhogineni , Somakumar Ramachandrapanicker
摘要： A wireless charging device includes a driver unit configured to generate one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency. Also, the wireless charging device includes a transmitting unit having a first coil and a first capacitor and configured to transmit the first AC voltage signal. Further, the transmitting unit includes a second coil and a second capacitor and configured to transmit the second AC voltage signal. Additionally, the wireless charging device includes a control unit configured to detect a first receiver device operating at the first frequency based on a change in a first voltage in the transmitting unit, and detect a second receiver device operating at the second frequency based on a change in a second voltage in the transmitting unit.
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公开(公告)号：US20210265864A1
公开(公告)日：2021-08-26
申请号：US17166857
申请日：2021-02-03
摘要： One innovative aspect of the subject matter described in this disclosure can be implemented in a wireless power reception apparatus. In some implementations, the wireless power reception apparatus may include a ferrite layer including a void. The wireless power reception apparatus may also include a first secondary coil configured to generate first power in cooperation with one or more primary coils of a wireless power transmission apparatus, where at least a portion of the first secondary coil resides in the void of the ferrite layer. The wireless power reception apparatus may also include one or more second secondary coils configured to generate second power in cooperation with the one or more primary coils of the wireless power transmission apparatus, where a portion of the second secondary coil is overlaying the portion of the first secondary coil residing in the void of the ferrite layer.
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公开(公告)号：US20210083526A1
公开(公告)日：2021-03-18
申请号：US17048415
申请日：2019-04-17
发明人： Suma Memana Narayana Bhat , Deepak Aravind , Viswanathan Kanakasabai , Pradeep Vijayan , Adnan Kutubuddin Bohori
摘要： A device for detecting a foreign object (112) in a WPT system is disclosed. The device includes an injection unit (122) to receive a DC power signal and generate a first AC power signal having a first frequency. Also, the device includes an array of coils (120) to receive the first AC power signal having the first frequency and generate a first electromagnetic field at the first frequency. Further, the device includes a detection unit (124) to measure a parameter of at least one of the DC power signal received by the injection unit (122) and the first AC power signal generated by the injection unit (122), and detect the foreign object (112) within the first electromagnetic field based on a change in the parameter of at least one of the DC power signal and the first AC power signal across at least one of the array of coils (120).
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