| 摘要 |
PURPOSE: To reduce operation noise and enable operation with a small swing moment at best efficiency by series-connecting a phase coil considering the number of revolutions. CONSTITUTION: Individual phase coils, I, II, III, IV, V and VI are connected through two half-bridges W11, W12; W21, W22; W31, W32; W41, W42; W51, W52 and W61, W62. The respective two half-bridges of two phase coils are connected to each other by bistable switching elements S1 , S2 or S3 . The adjustment for the waveform of a current is performed by a current adjusting device C1. A controller C2 compares the actual value nist of a rotating machine with a target value nsoll to perform the changeover of the switching elements S1, S2, S3. |
