METHOD FOR DETECTING INITIAL MAGNETIC POLE POSITION OF ROTOR IN PERMANENT MAGNET SYNCHRONOUS MOTOR

摘要

The present invention relates to a method for detecting an initial magnetic pole of a rotor in a permanent magnet synchronous motor. According to an embodiment of the present invention, the method for detecting an initial magnetic pole position of a rotor in a permanent magnet synchronous motor comprises steps of: generating three phase voltage vectors to be applied to u phase, v phase, and w phase of a stator winding; applying the three phase voltage vectors to the u phase, the v phase, and the w phase, respectively; calculating a current difference value of the u phase, a current difference value of the v phase, and a current difference value of the w phase using a current flowing in the direction of magnetization and a current flowing in the direction of non-magnetization in accordance with the application of the three phase voltage vectors; and determining the initial magnetic pole position of the rotor using the current difference value of the u phase, the current difference value of the v phase, and the current difference value of the w phase. According to the present invention, the initial magnetic pole position of the rotor in the permanent magnet synchronous motor can be accurately detected without using an additional magnetic pole sensor.;COPYRIGHT KIPO 2016