METHOD FOR DETECTING PHASE CURRENT OF MOTOR

摘要

PURPOSE: A method is provided to achieve improved accuracy of detection of current by obtaining three-phase current values from the two currents having high accuracy regardless of the waveform of the pulse width modulation. CONSTITUTION: A method comprises a step(S501 to S503) of permitting a control unit to sequentially read three-phase current values sensed through the phase current sensing units; a step(S504) of discarding the current of the C phase having the highest duty ratio from among the three-phase current values, and detecting currents of A and B phases; and a step(S505) of detecting the current value of the C phase by taking the negative value of the sum of the current values of A and B phases.