| 摘要 |
PROBLEM TO BE SOLVED: To provide a power source circuit for driving a three-phase AC motor without necessity of altering a design even in the case of changing number of shafts. SOLUTION: The power source circuit for driving a three-phase AC motor for a machine having a drive source of three-phase SC motors 9a, 9b at respective shafts of two shafts comprises a DC-DC switching regulator having a transformer, a primary side switching element provided at a primary side of the transformer and a primary side driving circuit for driving the element, and a secondary side power source having a plurality of secondary side driving circuits per one shaft provided at the one shaft provided at the secondary side of the transformer and a plurality of secondary side switching elements for three-phase connected to a plurality of secondary side driving circuits. The regulator and the secondary side power source are modularized and constituted as the same circuits, and the modularized same circuits are mounted adjacently on a printed circuit board. |
