公开(公告)号：US20130057275A1

公开(公告)日：2013-03-07

申请号：US13665624

申请日：2012-10-31

Applicant: ALPS Green Devices Co., Ltd.

Inventor： Manabu TAMURA ,  Masatoshi NOMURA ,  Hiroyuki HEBIGUCHI

IPC: G01R33/02

CPC classification number: G01R15/207 ,  B60L3/0038 ,  B60L11/182 ,  B60L11/1861 ,  B60L2240/549 ,  G01R1/203 ,  G01R19/0092 ,  Y02T10/7005 ,  Y02T10/7044 ,  Y02T10/705 ,  Y02T10/7072 ,  Y02T10/7088 ,  Y02T90/122 ,  Y02T90/14

Abstract: A current sensor includes a magnetic balance sensor including a feedback coil that is disposed in the vicinity of a magnetic sensor element whose characteristics are changed by an inducted magnetic field from a current to be measured and generates a cancellation magnetic field for offsetting the inducted magnetic field, a shunt resistant that is connected in series with a current line for circulating the current to be measured, and a switch circuit that switches to magnetic balance detection at the time of a small current and switches to shunt resistance detection at the time of a large current.

Abstract translation: 电流传感器包括磁平衡传感器，该磁平衡传感器包括设置在磁传感器元件附近的反馈线圈，该磁传感器元件的特性通过来自待测电流的感应磁场而变化，并产生用于抵消感应磁场的抵消磁场 ，与用于循环待测电流的电流线串联连接的分流电阻，以及在小电流时切换到磁平衡检测的开关电路，并在大时间切换到分流电阻检测 当前。