Patent ID: 6208108
Filing Date: 2001-03-27
Classification: H02P

Abstract:
A controller includinga reluctance type synchronous motor having, inside a rotor, magnetic force insulation means such that magnetic reluctance caused on a surface of the rotor made of soft magnetic material is different in a rotation direction viewed from a stator, whereby magnetomotive force due to the stator is generated penetrating a magnetic pole, where the magnetic reluctance is weak, for generation of a torque to rotate the magnetic pole of the rotor to move in a direction of the magnetomotive force,detection means for detecting a rotor position of the rotor, and,current command calculation means for obtaining a current command by adding an armature current command and a field current command at the rotor position for supplying a current to the synchronous motor, the controller comprising:a calculator for obtaining a field current command by multiplying a field current command corresponding to the rotor speed, and a coefficient supplied from a field current compensation coefficient calculator, the coefficient corresponding to a torque command.