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公开(公告)号：US11796709B2
公开(公告)日：2023-10-24
申请号：US17096054
申请日：2020-11-12
发明人： Mou He , Wei Chen , Yongfa Zhu
摘要： A detection coil includes a first group of coils, a second group of coils, and a third group of coils that are continuously wound and coaxial, and the second group of coils is located between the first group of coils and the third group of coils. A coil that generates the first magnetic field is coaxial with the first group of coils, the second group of coils, and the third group of coils. A sum of the induced electromotive forces of the first group of coils, the second group of coils, and the third group of coils is zero. When a metal foreign matter exists, a sum of the induced electromotive forces of the first group of coils, the second group of coils, and the third group of coils is not zero.
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公开(公告)号：US11329521B2
公开(公告)日：2022-05-10
申请号：US17209484
申请日：2021-03-23
发明人： Mou He , Wei Chen , Yongfa Zhu , Shaojie Feng
摘要： This application provides a wireless charging foreign object detection apparatus, applied to the field of wireless charging technologies. The detection apparatus includes: an excitation coil configured to provide a time-varying magnetic field, detection coils configured to detect a foreign object, and a processor configured to determine whether a foreign object exists. The detection coils may include two detection coils, or may include at least three detection coils. The at least three detection coils may be further configured to eliminate a detection blind spot.
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公开(公告)号：US20210063599A1
公开(公告)日：2021-03-04
申请号：US17096054
申请日：2020-11-12
发明人： Mou He , Wei Chen , Yongfa Zhu
摘要： A detection coil includes a first group of coils, a second group of coils, and a third group of coils that are continuously wound and coaxial, and the second group of coils is located between the first group of coils and the third group of coils. A coil that generates the first magnetic field is coaxial with the first group of coils, the second group of coils, and the third group of coils. A sum of the induced electromotive forces of the first group of coils, the second group of coils, and the third group of coils is zero. When a metal foreign matter exists, a sum of the induced electromotive forces of the first group of coils, the second group of coils, and the third group of coils is not zero.
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