| 摘要 |
PROBLEM TO BE SOLVED: To suppress torque ripples when torque demand for a motor is increased suddenly. SOLUTION: The voltage of a battery is estimated when the motor is controlled by a torque instruction T* by using a voltage estimation internal resistance Rin being the resistance of the battery, the torque instruction T*, battery voltage Vb and a motor revolutions Nm when the high frequency voltage of a shorter period than at the start in a current instruction decision processing routine is applied to the battery (S100-S108), and current instructions Id*, Iq* are determined by estimated battery estimation voltage Vbs, the torque instruction T* and the motor revolutions Nm (S110). The torque ripples produced when the current instructions Id*, Iq* are not suitable for the battery voltage Vb since the battery voltage is estimated and the current instructions Id*, Iq* are determined even when the torque instruction T* is increased suddenly. |
