Patent Number: 8,502,415

Title: Uninterrupted power supply unit

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.

Inventors: Yamada; Masaki (Tokyo, JP), Iwata; Akihiko (Tokyo, JP), Hatakeyama; Yoshihiro (Tokyo, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha

International Classification: H02J 7/00 (20060101)

Expiration Date: 2021-08-06 0:00:00