| 摘要 |
<p>It provides a power unit including: a multi-phase bridge rectifier, having inputs being electrically connectable to a source of multi-phase AC power; a smoothing filter, being connected to an output of said multi-phase bridge rectifier; and a multiple of H-bridge inverters; wherein: input terminals of said multiple of H-bridge inverters are electrically connected in parallel with said smoothing filter; and output terminals of said multiple of H-bridge inverters are electrically connected in parallel and are adapted for providing a single-phase output to an AC load. By having the power unit, it has one three-phase bridge rectifier thus it is helpful for eliminating the current sharing issues occurring among more than one three-phase bridge rectifiers. In addition, by having three H-bridge inverters electrically connected in parallel in the power unit, the current rate for the power unit is increased as compared with that with one H-bridge inverter. Preferably, a multiple of pre- charging resistors can respectively arranged between said output of said respective one of said multiple of legs of said multi-phase bridge rectifier and said respective one of said multiple of capacitor banks.</p> |
