| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller for three-phase rotary machines wherein torque fluctuation associated with switching from rectangular wave control to current control can be favorably suppressed when the current control in which a detection value of current passed through a three-phase rotary machine is feedback-controlled to a command value and the rectangular wave control are carried out. <P>SOLUTION: In PWM control, a command value on the dq-axis takes a value on a command current curve CL. A current vector Is symmetrical to an actual current vector Ir in the rectangular wave control with respect to the command current curve CL is computed. When the current vector Is and the actual current vector Ir symmetrical to each other substantially agree with each other, the control is switched to the PWM control. <P>COPYRIGHT: (C)2008,JPO&INPIT |
