Patent ID: 11923723
Assignee: TOSHIBA MITSUBISHI—ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The uninterruptible power supply according to claim 1, wherein
the controller selects a power supply mode from the first power supply mode, the second power supply mode, the third power supply mode, a fourth power supply mode and a fifth power supply mode and the controller executes power supply operations in accordance with the selected power supply mode such that:
when the fourth power supply mode is selected, the controller turns on the first switch and the second switch to supply AC power from the AC power supply to the load via the first switch and the second switch, and controls the second power converter to convert the AC power supplied from the AC power supply via the first switch and the second switch into DC power and store the DC power in the power storage device, and
when the fifth power supply mode is selected, the controller turns off the first switch, and controls the second power converter to convert the DC power of the power storage device into AC power and supply the AC power to the load.