| 摘要 |
<p>A motion control system (10) includes an inverter (18) adapted to receive electrical power at a first DC voltage level and selectively provides power to a motor (22). A first DC-DC converter (29) receives electrical power at the first DC voltage level and provides electrical power at a second DC voltage level. A second DC-DC converter (32) receives electrical power at the second DC voltage level and provides electrical power at a third DC voltage level. A controller (20) receives electrical power at the third DC voltage level and provides control signals to the inverter (18). A switching circuit (36) is connectable to a second source of power (28) and provides electrical power to the second DC-DC converter (32) when the second DC voltage is less than a selected threshold.</p> |
