Patent ID: 11936237
Assignee: TOSHIBA MITSUBISHI—ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The uninterruptible power supply apparatus according to claim 2, further comprising:
a selector that selects one mode of the first and second modes;
a signal generating circuit that outputs a switch command signal in response to a mode selected by the selector being changed from one mode to the other mode; and
a timer that successively measures a first time, a second time, and a third time, in response to the switch command signal, wherein
in the switching period, the first controller executes the third mode from when the first time is measured by the timer to when the second time is measured by the timer, and
in the switching period, the second controller passes the second AC current from the first AC power supply to the rectifier from when the switch command signal is output to when the third time is measured by the timer.