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

Claim 12:
13. The uninterruptible power supply apparatus according to claim 12, wherein
the second controller includes
a gain generating circuit that sets the gain to a first value when the terminal-to-terminal voltage of the capacitor is lower than the reference voltage, and sets the gain to a second value lower than the first value by reducing the gain in accordance with a difference between the terminal-to-terminal voltage of the capacitor and the reference voltage when the terminal-to-terminal voltage of the capacitor is higher than the reference voltage,
a reference voltage generating circuit that sets the reference voltage to the first voltage value in the first and second modes, and sets the reference voltage to the second voltage value higher than the first voltage value from when the switch command signal is output to when the third time is measured by the timer, and
a voltage detector that detects the terminal-to-terminal voltage of the capacitor, and

the second controller
obtains the first and second feed forward components by multiplying the load current by the gain set by the gain generating circuit, and
obtains the first and second feedback components based on deviation between the reference voltage set by the reference voltage generating circuit and a detected value from the voltage detector.