System for monitoring and controlling a brushless motor, the motor being three-phase and associable to an electric power source by means of a rectifier, the system being characterized by comprising at least: - an actuator assembly operatively associated to the motor and to the rectifier, the rectifier being arranged to provide a busbar voltage (Vbar) and a reference voltage (Vref) to the actuator assembly, the busbar voltage (Vbar) and the reference voltage (Vref) being continuous, the actuator assembly comprising switches (SW 1-6) arranged to energize two phases (FA,FB; FA,FC; FB,FC) of the motor simultaneously, the actuator assembly further being capable of maintaining the induced voltage in a non-energized phase (FC; FB; FA) of the motor at the value of the busbar voltage (Vbar) or at the value of the reference voltage (Vref) when a transient current occurs in the motor; - a voltage observer operatively associated to the motor and to the actuator assembly, the voltage observer being capable of permitting the monitoring of an induced voltage in a non-energized phase (FC; FB; FA) of the motor; and - a control unit operatively associated to the voltage observer, the control unit being arranged to permit a detection of the drop in voltage by the voltage observer, the control unit further being arranged to command the opening of a certain switch (SW 1-6) of the actuator assembly for a certain time interval to interrupt the power supply to the motor, when the reading of the induced voltage in the non-energized phase (FC; FB; FA) of the motor presents a value comprised within a preset voltage interval (dV), the preset voltage interval (dV) relating to the drop in voltage and indicating the occurrence of a transient current in at least one non-energized phase (FC; FB; FA) of the motor. - an actuator assembly operatively associated to the motor and to the rectifier, the rectifier being arranged to provide a busbar voltage (Vbar) and a reference voltage (Vref) to the actuator assembly, the busbar voltage (Vbar) and the reference voltage (Vref) being continuous, the actuator assembly comprising switches (SW 1-6) arranged to energize two phases (FA,FB; FA,FC; FB,FC) of the motor simultaneously, the actuator assembly further being capable of maintaining the induced voltage in a non-energized phase (FC; FB; FA) of the motor at the value of the busbar voltage (Vbar) or at the value of the reference voltage (Vref) when a transient current occurs in the motor; - a voltage observer operatively associated to the motor and to the actuator assembly, the voltage observer being capable of permitting the monitoring of an induced voltage in a non-energized phase (FC; FB; FA) of the motor; and - a control unit operatively associated to the voltage observer, the control unit being arranged to permit a detection of the drop in voltage by the voltage observer, the control unit further being arranged to command the opening of a certain switch (SW 1-6) of the actuator assembly for a certain time interval to interrupt the power supply to the motor, when the reading of the induced voltage in the non-energized phase (FC; FB; FA) of the motor presents a value comprised within a preset voltage interval (dV), the preset voltage interval (dV) relating to the drop in voltage and indicating the occurrence of a transient current in at least one non-energized phase (FC; FB; FA) of the motor.