Patent ID: 6984959
Filing Date: 2006-01-10
Classification: H02P

Abstract:
1. A control device for controlling a wound field synchronous machine having a field coil and permanent magnets for generating magnetic fields, said control device comprising: a flux command generator for producing a flux command based on an input turning speed of the synchronous machine; an armature flux linkage calculator for calculating the magnitude and phase of armature flux linkage and power angle from the values of armature currents and field current flowing in the synchronous machine taking into consideration magnetic fluxes produced by the permanent magnets; a divider for producing an armature current command by dividing a torque command by the armature flux linkage; a field current command calculator for calculating a field current command based on an error of the armature flux linkage calculated by said armature flux linkage calculator from the flux command and the power angle; and an armature current controller for controlling the synchronous machine in such a way that both an error of an armature current in a direction perpendicular to the direction of the armature flux linkage from the armature current command and an armature current in the direction of the armature flux linkage become zeros.