| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the voltage stabilization effects of a power supply line in a system for driving an AC motor via an inverter with a system voltage, by allowing the power supply line to generate the system voltage, while stepping up a voltage of a DC power supply using a step-up converter. <P>SOLUTION: Second system-voltage stabilization control for suppressing variations in system voltage is executed by controlling the step-up converter 21, while executing first system-voltage stabilization control for suppressing the variations in system voltage by operating input power of the AC motor 14. the frequency band for suppressing the variations in system voltage by the first system-voltage stabilization control is separated from a frequency band for suppressing the variations in system voltage by the second system-voltage stabilization control. Consequently, while preventing interference between the first/second system-voltage stabilization control, the system voltage can be stabilized effectively by using both of the first/second system-voltage stabilization control. <P>COPYRIGHT: (C)2007,JPO&INPIT |
