| 摘要 |
PROBLEM TO BE SOLVED: To resolve an unstable state of an operation of a power conversion device due to vibration of DC voltage caused by small capacitance of a capacitor and various conditions.SOLUTION: A command value correction circuit 2 includes a correction request circuit 21 and a command reduction circuit 22. The correction request circuit 21 creates a signal SJ that increases corresponding to the length of a period during which a stability determination signal J is activated, and outputs a correction request signal K0 that is activated when the signal SJ is larger than a threshold TH0. The command reduction circuit 22 outputs, for example, a modified frequency command f** obtained by reducing a frequency command f* upon activation of the correction request signal K0. |
