| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor controller capable of effectively suppressing a motor current without degrading stability of motor control. <P>SOLUTION: A current command value restriction section 74 restricts a γ-axis current command value to be not more than a current command upper limit value Ilim calculated by a current command upper value calculation section 73. A switching control section 75 provided at the current command upper limit calculation section 73 determines whether or not a control state of a motor is stable, based on a basic component of an addition angle corresponding to a motor rotational angle variation per calculation cycle, namely, a first change component dθτ based on a torque deviation Δτ and an induced voltage (induced voltage square sum Esq_αβ) generated by the rotation of the motor. In addition, the switching control section 75, when its control state is determined to be unstable, determines that the current command upper limit value Ilim shall be changed to a higher value (Ilim_b) than a value (Ilim_a) when the control state is stable. <P>COPYRIGHT: (C)2013,JPO&INPIT |
