Patent ID: 11940473
Assignee: HYUNDAI MOBIS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 6:
7. A method for compensating for an offset in switching current sensing, the method comprising:
receiving a current sensing signal from a phase current reconstruction unit configured to receive an output value of an integrator, which is configured to integrate a differentiated value received from a Rogowski coil configured to detect a switching current flowing through each of switching elements to output the differentiated value, to perform a phase current reconstruction function, which is a subtraction operation on the output value of the integrator, to derive a voltage value corresponding to a phase current, and to output the voltage value as the current sensing signal;
processing the current sensing signal using an offset calibration software;
compensating for an offset of the current sensing signal in real time; and
providing a reset signal to the integrator at a timing of an ON period of a pulse-width modulation (PWM) switching signal.