| 摘要 |
<p>To provide a motor driving system that does not require a backup power supply apparatus. A motor driving system for converting an alternating current power supply (1) into a direct current power supply (2) and using the direct current power supply (2) to drive motors (11) and (12) by rotation-speed-controlling apparatuses (8) and (9), wherein the direct current power supply (2) supplies controlling power via a DC/DC converter (6) to external equipment (7) different from the rotation-speed-controlling apparatus. <IMAGE></p> |
