Patent ID: 9000613
Filing Date: 2015-04-07
Classification: H02J

Abstract:
1. An uninterruptible power supply comprising: a rectifier coupled to an input of the uninterruptible power supply and converting a first alternating current having a first alternating current voltage to a direct current provided to a direct current bus; an inverter coupled to an output of the uninterruptible power supply and converting direct current provided by the direct current bus to an second alternating current having a second alternating current voltage; a bypass switch having a bypass state and a non-bypass state, wherein the bypass switch is configured to bypass the rectifier and the inverter and provide a bypass voltage from the input to the output when in the bypass state; and a control module that operates in a bypass mode and a UPS mode, wherein the control module switches the bypass switch to the bypass state when in the bypass mode and switches the bypass switch to the non-bypass state when in the UPS mode, wherein the control module, when in the UPS mode, further operates in a normal UPS mode and an adaptive voltage control mode, and wherein the control module, when operating in the adaptive voltage control mode, adjusts the second alternating current voltage from a first level to a second level upon switching from the bypass mode to the UPS mode.