| 摘要 |
<P>PROBLEM TO BE SOLVED: To materialize good weakish magnetic flux control when performing vector control, adopting a control shaft different from a d-axis and a q-axis. <P>SOLUTION: A motor controller makes the control shaft corresponding to the d-axis and the q-axis a γ-axis and a δ-axis, and determines a rotation axis whose direction conforms to the direction of a current vector to be supplied to a motor when materializing maximum torque control as a qm-axis. Then, the motor controller decomposes a motor current into a γ-axis current and a δ-axis current to perform vector control, and materializes maximum torque control by making the δ-axis follow the qm-axis. In the case of performing weakish magnetic flux control at high-speed revolution, the motor controller computes the γ-axis current command for weakish magnetic flux control, using the estimate value of the interlinked magnetic flux of the armature winding of the motor or the estimate value of the induced voltage generated by the above interlinked magnetic flux and the rotation of the motor. <P>COPYRIGHT: (C)2008,JPO&INPIT |
