Patent ID: 7554281

Claim:
A synchronous machine control apparatus for generating an armature current command from a torque command and controlling an armature current of a synchronous machine by means of a power conversion unit based on said armature current command, said synchronous machine control apparatus comprising: a torque current command generator including: a torque current calculator for calculating a torque current command which is a torque component of said armature current command from said torque command and a flux command; a torque current limit generator for generating a maximum torque current command value which can be generated based on a magnetizing current command which is a magnetizing component of said armature current command and a current limit value of said power conversion unit such that said armature current does not exceed said current limit value; and a limiter for imposing limitations on said torque current command based on said maximum torque current command value; a flux command generator for calculating the flux command based on the torque current command fed from said torque current command generator; a flux calculator for calculating interlinked armature flux based on the armature current or on a combination of the armature current and an armature voltage of said synchronous machine; and a flux controller for generating said magnetizing current command such that said flux command and said interlinked armature flux coincide with each other and delivering said magnetizing current command to said torque current command generator.