MACHINE TYPE IDENTIFICATION

摘要

For identifying the machine type of an alternating current (AC) machine (400), a direct current (DC) is first applied to the stator (401) for aligning the d-axis of the rotor (402) and the magnetic field direction of the stator (401). Secondly, a DC is applied to the stator (401) at a current angle q which causes the rotors (402) of a permanent magnet machine (PM) and a synchronous reluctance machine (Syn RM) to exert torque in different directions. The torque direction (406) of the rotor (402) is detected and the machine type is identified based on the torque direction information. The machine type is recognized as a PM or a Syn RM depending on the torque direction (406). If no torque is detected then the machine type is recognized as an induction machine (IM).