CONTROLLER AND CONTROL METHOD FOR ELECTRIC ROTATING MACHINE

摘要

PROBLEM TO BE SOLVED: To obtain a highly efficient stabilized controller for electric rotating machine by determining a dq axis current command such that the terminal voltage of an electric rotating machine does not exceed the possible output voltage of a power converter even at the time of current transience and correcting fluctuation of DC input voltage. SOLUTION: A dq axis current command table selecting means 301 selects an optimal current command table from a DC input voltage value and a dq axis current command table retrieving means 305 retrieves a d-axis current command Id* and a q-axis current command Iq* from that table using a torque command Tref and the r.p.m. of synchronous motor as parameters. When an AC three-phase voltage command operating means operates an AC three-phase voltage command, a dq-axis voltage command value is corrected using a DC voltage value detected by a DC voltage means. According to the arrangement, stabilized control can be realized without increasing the gain in the operation of dq-axis voltage compensation amount.