METHOD OF ACCELERATED EXTINGUISHING OF RESIDUAL CURRENT AND METHOD OF DURATION CONTROL OF THE METHOD OF ACCELERATED EXTINGUISHING OF RESIDUAL CURRENT

Method of accelerated extinguishing of residual current of a phase that opens when changing an electric position during the driving of a BLDC motor (10), under high load conditions, comprising:using the unipolar pulse width modulation pattern ON_PWM to drive the BLDC motor (10);determining if there is residual current by means of monitoring the voltage of the phases that opens using a voltage observer (40);while there is residual current, applying a switching pattern, on the switches (S1-S6) of the BLDC motor (10), which superimposes the pulse width modulation pattern used and maximizes the voltage in the open phase for the accelerated extinguishing of said residual current,said switching pattern comprising:opening the switch of the phase maintained driven when changing the electrical position; andclosing the switch related to the phase that was driven when changing the electric position.