The invention provides a foreign matter detection device. The foreign matter detection device is arranged between a power transmitting device and a power receiving device. The foreign matter detectiondevice comprises an excitation source, a resonance module and a detection control module, wherein the resonance module is respectively connected with the excitation source and the detection control module; the resonance module comprises at least two resonance units which are connected in parallel, one resonance unit comprises an inductance coil, a first capacitor and a change-over switch, the inductance coil of any resonance unit is connected with the first capacitor in parallel to obtain a resonance network, and the resonance network of any resonance unit is connected with the change-over switch in series; the inductance coil of any resonance unit and the inductance coils of at least one of the other resonance units form a decoupling coil group, and the mutual inductance coefficient between the inductance coils in the decoupling coil group is zero; the excitation source provides excitation current; the detection control module is used for determining whether a foreign matter exist between the power transmitting device and the power receiving device or not. According to the invention, the stability of foreign matter detection can be enhanced, and the safety of foreign matter detection is high.
本申请提供了一种异物检测装置,设置于功率发射装置和功率接收装置之间。上述异物检测装置包括激励源、谐振模块和检测控制模块,谐振模块分别与激励源和检测控制模块相连;谐振模块中包括并联的至少两个谐振单元,一个谐振单元中包括一个电感线圈、一个第一电容和一个切换开关,任一谐振单元的电感线圈与第一电容并联得到谐振网络,任一谐振单元的谐振网络与切换开关串联;任一谐振单元的电感线圈与其他至少一个谐振单元的电感线圈构成解耦线圈组,解耦线圈组中各电感线圈之间的互感系数为零;激励源提供激励电流;检测控制模块用于确定功率发射装置和功率接收装置之间是否有异物。采用本申请,可增强异物检测的稳定性,异物检测的安全性高。
Foreign matter detection device and wireless charging transmitting terminal equipment
异物检测装置及无线充电发射端设备
2020-10-27
Patent
Electronic Resource
Chinese
Foreign matter detection device and method and wireless charging transmitting terminal equipment
European Patent Office | 2022
|European Patent Office | 2021
|European Patent Office | 2021
|