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US 2007/0164613 A1Published application
Power supply apparatus
AssigneeMisubishi Denki Kabushiki Kaisha
InventorsMasaki Yamada, Akihiko Iwata, Yoshihiro Hatakeyama
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Abstract
An uninterrupted power supply unit is provided with a straightforward switch connected between a power source and a load to supply or interrupt a power to a system. The combination of the outputs from two kinds of single phase inverters enables compensating for a variation in the system voltage in the normal condition and to supply a predetermined voltage to the load after decreasing in the system voltage and opening of a straight forward switch.
Claims16
An uninterrupted power supply unit comprising:
- a straightforward switch connected in series with a system which connects a power source to a load, and supplying or interrupting an electric power served from the power source to the load;
- a first single phase inverter connected in parallel with said system;
- a second single phase inverter connected in series with said system:
- and
- a battery connected to direct current side terminals of said the first and second single phase inverters.
2 more elements
Dependencies are inferred from the claim text.