| 摘要 |
<p>Pulse Width Modulated Inverter for Unbalanced and Variable Power Factor Loads An n-phase inverter for developing polyphase AC power from DC power developed by a DC source over first and second DC bus lines and a neutral line includes circuitry for preventing the return of regenerative currents developed by a load connected to the output of the inverter to the DC source. The circuitry includes means for sensing the presence of regenerative currents, and switches which are operated when a regenerative current is sensed to disconnect the DC source from the inverter and to shunt the regenerative current back to the load. The inverter may therefore by used with DC sources which cannot accept regenerative currents. Furthermore, the size of a DC bus filter between the DC source and the inverter may be substantially reduced.</p> |
