| 摘要 |
PURPOSE:To secure the necessary motor output by a method wherein driving current is vector-controlled to an initial state when the battery voltage is considered to be the reference minimum voltage and at a point of time when the battery voltage becomes stable after the vector control of the driving current, the driving current is vector-controlled according to the stabilized battery voltage. CONSTITUTION:When a current conditions calculating section (CC) 16 determines that a torque command T* and the number of rotations of a motor change a specified amount or above, it outputs, to a current controlling section 18, an optimum exciting current component ID and an optimum torque current component Iq at the time when the battery voltage Vdc is the reference minimum value Vdcmin, as current command values (Id*, Iq*). By this, the current of the motor 14 is vector-controlled. After the battery voltage Vdc is stabilized, the CC16 corrects the current command values based on the stabiiized battery voltage and supplies the corrected current command values (Id*, Iq*) to the current controlling section 18. |
