公开(公告)号：US11313917B2

公开(公告)日：2022-04-26

申请号：US15929620

申请日：2020-05-13

Applicant: Lear Corporation

Inventor： Steven Cong ,  David A Hein ,  Ajmal Imran Ansari ,  Anthony Armento ,  Arthur Hurlburt ,  Ryan Cleveland ,  Matthew Zamieski

IPC: G01R31/52 ,  G01R15/20 ,  G01R19/00

Abstract: An electric current sensor for detecting a leakage current from an electric vehicle charger. The current sensor includes a magnetic core having a gap formed therein, a first conductor wound around the magnetic core to form a first coil, a second conductor wound around the magnetic core to form a second coil, and a tunnel-magnetoresistance (TMR) sensor element arranged in the gap of the magnetic core. A difference between electric current flow in the first and second conductors produces a magnetic field in the gap of the magnetic core proportional to a leakage current, and the magnetic field produces a voltage in the TMR sensor element indicative of a value of the leakage current.

公开(公告)号：US10594157B2

公开(公告)日：2020-03-17

申请号：US16431800

申请日：2019-06-05

Applicant: LEAR CORPORATION

Inventor： Steven Cong ,  David A Hein ,  Ryan Cleveland ,  Eric Salem

IPC: H02J7/02 ,  B60L53/12 ,  H02J50/12

Abstract: A wireless charger output protection system and method is provided for protecting a battery in an electric vehicle during wireless charging. A wireless power transfer system includes a wireless charger on the electric vehicle side that receives power wirelessly from a charging base. The wireless charger output protection system and method shuts down the wireless charger output and dumps energy in a receive antenna (e.g., a vehicle pad) when a charging error is detected before the charging base can be shut down. The system and method employs a zero-voltage switching (ZVS) scheme to shut down the wireless charger output, in response to the charging error, to protect the switching devices and enhance overall reliability.