| 摘要 |
PROBLEM TO BE SOLVED: To make substantially constant an intermediate circuit voltage by a three-point DC voltage middle circuit. SOLUTION: A converter circuit facility is the one for matching a variable DC voltage to a drive circuit, making a drive signal, and having a three-point DC voltage middle circuit (2). The three-point DC voltage middle circuit (2) is made of a first capacitor (3) and a second capacitor (4) connected in series with it, one connection of the first capacitor (3) forms the upper connection (5) of the three-point DC voltage middle circuit (2), the first capacitor (3) forms a center point connection (6) at the junction with the second capacitor (4), and one connection of the second capacitor (4) forms the lower connection (7) of the three-point DC voltage intermediate circuit (2).
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