METHOD FOR STARTING SYNCHRONOUS MOTOR

The invention relates to a method for starting a synchronous motor. The synchronous motor includes a rotor that generates a first magnetic field and a stator having a stator winding connected to an electrical energy converter that converts a supply voltage to a stator voltage. The method comprises the steps: applying a reference stator voltage to the stator winding; measuring a stator current in the stator winding; calculating an estimated rotor speed and an estimated rotor position of the rotor according to the applied stator voltage and the measured stator current; calculating a speed error by subtracting the estimated rotor speed from the reference rotor speed; determining a reference torque generation current component according to the speed error and modifying the reference current vector by using the reference torque generation current component; calculating a position error by subtracting the estimated rotor position from the reference rotor position; correcting the reference current vector by converti