METHOD FOR DETECTING CURRENT OF VARIABLE LOAD USING A TEMPERATURE COEFFICIENT OF SHUNT REGISTOR

摘要

In the present invention, a variable current measurement method using a temperature coefficient of a shunt resistor capable of accurately calculating a current amount of a load is disclosed. A current measuring method according to the present invention is a method for precisely measuring a current for a variable load using a temperature coefficient of a resistance, the method comprising the steps of: a) Calculating a current value Iofs_curr, updating the average current value Iofs_mv by averaging a pre-stored average current value Iofs_mv, and then estimating the average current value Iofs_mv as a current current value; B) calculating a current value (Itmp) according to the temperature coefficient when the operation for the variable load is performed, and assuming a result obtained by subtracting the average current value Iofs_mv as a current value (I); . Therefore, the present invention has the effect of improving the durability of the variable load such as the motor and securing the stability of the system by calculating the accurate current using the temperature coefficient of the shunt resistor.