US 11,750,035 B2
Wireless power transfer device with electromagnetic interference (EMI) suppression
Yitao Xing, Guangdong (CN)
Assigned to SHENZHEN QITIAN TAIYI TECHNOLOGY CO., LTD., Guangdong (CN)
Filed by Shenzhen Qitian Taiyi Technology Co., Ltd., Guangdong (CN)
Filed on Jul. 19, 2021, as Appl. No. 17/379,029.
Application 17/379,029 is a continuation of application No. PCT/CN2020/072926, filed on Jan. 19, 2020.
Claims priority of application No. 201920087512.4 (CN), filed on Jan. 19, 2019.
Prior Publication US 2021/0344230 A1, Nov. 4, 2021
Int. Cl. H02J 50/12 (2016.01); H02J 50/80 (2016.01); H02J 50/70 (2016.01); H02M 1/00 (2006.01); H02J 7/02 (2016.01); H02M 1/44 (2007.01); H04B 5/00 (2006.01); H04B 15/02 (2006.01)
CPC H02J 50/12 (2016.02) [H02J 7/02 (2013.01); H02J 50/70 (2016.02); H02J 50/80 (2016.02); H02M 1/0064 (2021.05); H02M 1/44 (2013.01); H04B 5/0037 (2013.01); H04B 5/0087 (2013.01); H04B 15/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wireless power transfer device with EMI suppression, comprising:
a power conversion circuit board;
a wireless power transfer coil group assembly comprising a coil; and
an eddy current damper (ECD) with a stable electric potential, the ECD being made of a conductive material,
wherein the power conversion circuit board is connected to the wireless power transfer coil group assembly through a high-frequency power cable; the ECD is close to the wireless power transfer coil group assembly; and the ECD is connected to a low-alternating current (AC) impedance direct current (DC) plane of the power conversion circuit board through a conductor, and
wherein a maximum projection length (D) of the ECD along an axial line of the coil of wireless power transfer coil group assembly is greater than or equal to ⅛ of a maximum projection length (d) of the coil, and a distance (s) between a geometric center of the ECD and the axial line of the coil is less than or equal to the maximum projection length (d) of the coil.