초록 ▼

Power conversion apparatus for AC to DC to AC power conversion includes a rectifier bridge formed of rectifying devices (24,25) connected to an AC source (21) and providing a DC output to DC bus lines (27,28). A full bridge of active switching devices (30, 31, 34, 35) is connected across the DC bus

Power conversion apparatus for AC to DC to AC power conversion includes a rectifier bridge formed of rectifying devices (24,25) connected to an AC source (21) and providing a DC output to DC bus lines (27,28). A full bridge of active switching devices (30, 31, 34, 35) is connected across the DC bus lines to which a power source such as a battery (39) may also be connected. The load (36) and the AC power supply (21) share a common neutral line (33). The output of the bridge can provide AC output power to the load through a transformer (74). The power conversion apparatus allows full control of the currents on the load lines and AC input lines, even when the input and output are asynchronous. By providing an external DC power source such as a battery (39), uninterrupted power can be supplied to the load when the AC power source fails.

대표청구항 ▼

Power conversion apparatus for providing AC to DC to AC power conversion comprising: (a) AC input terminals adapted to be connected to a single phase AC power source and AC output terminals adapted to be connected to a load; (b) a pair of DC bus lines; (c) a rectifier bridge connected to one of the

Power conversion apparatus for providing AC to DC to AC power conversion comprising: (a) AC input terminals adapted to be connected to a single phase AC power source and AC output terminals adapted to be connected to a load; (b) a pair of DC bus lines; (c) a rectifier bridge connected to one of the AC input terminals to rectify the current supplied thereto and connected between the DC bus lines; (d) a DC power source operably connected to provide DC power to the DC bus lines; (e) an inverter comprised of gate controllable active switching devices connected in a full bridge configuration across the DC bus lines and having two output nodes, the output nodes of the bridge connected to the output terminals for the conversion apparatus; (f) a common neutral line being common to one of the input terminals to the apparatus, to one of the output terminals of the apparatus and to one of the output nodes of the inverter bridge; (g) control means for controlling the switching of the controllable switching devices to provide AC output power at a selected frequency at the output terminals of the power conversion apparatus.