Method and system for calibrating a shunt resistor

摘要

A shunt resistor includes: two measuring terminals for applying a measuring current flowing through the shunt resistor along a main flow direction; slot structures dividing the shunt resistor along the main flow direction to include two side flow areas of respective first widths and a main flow area of a second width; and two calibration terminals connected to the side flow areas. A circuit connected to the measuring terminals is designed to detect, and generate a signal based on, a measuring current flowing through the shunt resistor. A calibration device connected to the calibration terminals is designed to apply a reference voltage or current to the calibration terminals, and ascertain a calibration voltage based on a falling voltage across those terminals. A correction circuit connected to the calibration device and the detection circuit is designed to correct the signal generated by the detection circuit based on the detected calibration voltage.

主权项

1. A shunt resistor, comprising:
two measuring terminals configured for application of a measuring current that flows through the shunt resistor along a main flow direction; slots that divide the shunt resistor along the main flow direction into (a) two side flow areas of respective first widths and (b) a main flow area of a second width, the flow of the measuring current being divided into three parallel flows, including respective flows in each of the two side flow areas and the main flow area; and two calibration terminals that are connected to the side flow areas transversely with respect to the main flow direction.