18825286. SHUNT-BASED CURRENT SENSOR (DENSO CORPORATION)
SHUNT-BASED CURRENT SENSOR
Organization Name
Inventor(s)
Shogo Kawahara of Nisshin-shi JP
Yoshikazu Furuta of Nisshin-shi JP
Tomohiro Nezuka of Nisshin-shi JP
SHUNT-BASED CURRENT SENSOR
This abstract first appeared for US patent application 18825286 titled 'SHUNT-BASED CURRENT SENSOR
Original Abstract Submitted
A shunt-based current sensor executes redundancy detection of a load current flowing through a load by using a shunt resistor. The shunt-based current sensor includes a reference resistor, a current excitation circuit, at least two voltage measurement circuits and a signal processing circuit. The reference resistor is connected to the shunt resistor in series. The current excitation circuit generates an AC excitation current and supply the AC excitation current to the shunt resistor and the reference resistor. At least two voltage measurement circuits measure a voltage across the shunt resistor. A signal processing circuit executes signal processing based on respective measurement voltages of the at least two voltage measurement circuits, and is operated in the load current redundancy detection mode or a shunt resistance measurement mode.