发明名称 |
Shunt resistor based current sensor |
摘要 |
A temperature sensor (60) is placed positionally corresponding to a central portion of a shunt resistor portion (SR). According to the configuration, it is possible to detect an approximately average temperature of the shunt resistor portion (SR) while avoiding a temperature biased in the temperature distribution in the shunt resistor portion (SR). As a result, the temperature of the shunt resistor portion which is the base of the resistance is reliably detected to enable the accuracy of current detection to be improved. |
申请公布号 |
US9377491(B2) |
申请公布日期 |
2016.06.28 |
申请号 |
US201214358088 |
申请日期 |
2012.12.11 |
申请人 |
YAZAKI CORPORATION |
发明人 |
Sato Takashi |
分类号 |
G01R31/36;G01R19/32;G01R1/20;G01R35/00 |
主分类号 |
G01R31/36 |
代理机构 |
Morgan, Lewis & Bockius LLP |
代理人 |
Morgan, Lewis & Bockius LLP |
主权项 |
1. A shunt resistor based current sensor comprising:
a busbar that includes a shunt resistor portion, and that has a substantially planar plate shape; a circuit board that is disposed on the busbar; a pair of connection terminal portions that are disposed corresponding to both end portions of the shunt resistor portion, and that are electrically connected to the circuit board; a voltage detecting unit that is disposed on the circuit board, and that detects a value of a voltage which is applied to the circuit board through the pair of connection terminal portions, in order to detect a magnitude of a current to be measured flowing through the busbar; and a temperature detecting unit that is disposed on the circuit board, and that detects a temperature of a vicinity of the busbar in order to allow the voltage detecting unit to perform correction, wherein the temperature detecting unit is placed positionally corresponding to a central portion of the shunt resistor portion in the busbar; and wherein, interposed between the busbar and the circuit board is a connecting portion that thermally couples the busbar to the temperature detecting unit. |
地址 |
Tokyo JP |