Uninterruptible power supply system and method for supplying backup power

    公开(公告)号:US10103564B2

    公开(公告)日:2018-10-16

    申请号:US15181892

    申请日:2016-06-14

    IPC分类号: H02J7/00 H02J9/06

    摘要: A UPS system includes UPS devices and a common bus. The UPS devices are configured to output respective backup voltages. The common bus electrically interconnects the UPS devices for receiving the backup voltages, and is configured to output to the UPS devices a greatest one of the backup voltages as a dominant voltage. Each UPS device is operable to detect the backup voltage outputted thereby, to compare the backup voltage with the dominant voltage, to determine whether a power recovery signal is received from the power supply equipment, and to vary the backup voltage with a descending trend, where the varying of the backup voltage is conducted at least based on the dominant voltage and the backup voltage.

    POWER SUPPLY AND CALIBRATION METHOD

    公开(公告)号:US20170353121A1

    公开(公告)日:2017-12-07

    申请号:US15496208

    申请日:2017-04-25

    摘要: A power supply includes a boost converter, a capacitor, a step-down converter and a control unit. The boost converter, when activated, converts an input voltage into a boost voltage. The capacitor has a bulk voltage which is equal to the boost voltage when the boost converter is activated. The step-down converter converts the boost voltage into a step-down voltage for output. While the boost converter is deactivated, the control unit samples the input voltage and the bulk voltage, calculates an estimated value, and determines a calibration parameter. While the boost converter is activated, the control unit calculates a calibration value for enabling the boost converter to convert the input voltage with reference to the calibration value.