| 摘要 |
PROBLEM TO BE SOLVED: To obtain a constitution such that a rush current does not flow to the input side of a DC voltage step-down means when a power converter such as a direct converter is fully cut off, and to expedite power saving, size reduction, weight reduction and cost reduction. SOLUTION: This control device of a power converter comprises: a power feed means 60A that includes rectifying circuits 61, 63 that are connected to AC input and output sides of the direct converter 10 at their AC sides, and connected to each other via a DC intermediate circuit; the DC voltage step-down means 73 that decreases a voltage of the DC intermediate circuit; a AC-DC conversion means 81 that converts an AC power supply voltage to a DC voltage; an abnormality detection means 50 that detects an abnormality of the AC power supply voltage; and a control means 41 that outputs a control command for generating a drive pulse to the direct converter 10. When the power supply voltage is normal, power is fed to the control means 41 from the AC-DC conversion means 81, and when the power supply voltage is abnormal, power is fed to the control means 41 from the DC intermediate circuit by operating the DC voltage step-down means 73. COPYRIGHT: (C)2006,JPO&NCIPI
|
