Uninterruptible power supply apparatus

An uninterruptible power supply apparatus comprising:

• a plurality of power conversion modules connected in parallel between an AC power supply and a load;
• a bypass module connected between the AC power supply and the load;
• an AC/DC converter that converts an AC voltage supplied from the AC power supply or an AC voltage supplied to the load into a first DC power supply voltage, and
• a power supply line that transmits the first DC power supply voltage generated by the AC/DC converter to the plurality of power conversion modules and the bypass module, wherein
• the bypass module includes
• a switch connected between the AC power supply and the load, and
• a first controller that operates upon receiving an operating power supply voltage based on the first DC power supply voltage to thereby control ON/OFF of the switch, and
• each of the plurality of power conversion modules includes
• a power converter that converts power supplied from the AC power supply or a power storage device into AC power and supplies the AC power to the load, and
• a second controller that operates upon receiving an operating power supply voltage based on the first DC power supply voltage to thereby control the power converter,
• the bypass module further includes a first control power supply, the first control power supply being connected to the power supply line and generating the operating power supply voltage for the first controller using the first DC power supply voltage, and
• each of the plurality of power conversion modules further includes a second control power supply, the second control power supply being connected to the power supply line and generating the operating power supply voltage for the second controller using the first DC power supply voltage, wherein
• the second control power supply includes a second DC/DC converter that converts the first DC power supply voltage into a third DC power supply voltage, and
• the second controller includes
• a second control circuit that operates upon receiving the third DC power supply voltage from the second DC/DC converter to thereby generate a control signal for controlling the power converter, and
• a second driver that operates upon receiving the first DC power supply voltage from the power supply line to thereby drive the power converter in accordance with the control signal output from the second control circuit.

An uninterruptible power supply apparatus comprising:

• a plurality of power conversion modules connected in parallel between an AC power supply and a load;
• a bypass module connected between the AC power supply and the load;
• an AC/DC converter that converts an AC voltage supplied from the AC power supply or an AC voltage supplied to the load into a first DC power supply voltage;
• and
• a power supply line that transmits the first DC power supply voltage generated by the AC/DC converter to the plurality of power conversion modules and the bypass module, wherein
• the bypass module includes
• a switch connected between the AC power supply and the load, and
• a first controller that operates upon receiving an operating power supply voltage based on the first DC power supply voltage to thereby control ON/OFF of the switch, and
• each of the plurality of power conversion modules includes
• a power converter that converts power supplied from the AC power supply or a power storage device into AC power and supplies the AC power to the load, and
• a second controller that operates upon receiving an operating power supply voltage based on the first DC power supply voltage to thereby control the power converter,
• the bypass module further includes a first control power supply, the first control power supply being connected to the power supply line and generating the operating power supply voltage for the first controller using the first DC power supply voltage, and
• each of the plurality of power conversion modules further includes a second control power supply, the second control power supply being connected to the power supply line and generating the operating power supply voltage for the second controller using the first DC power supply voltage, wherein
• the AC/DC converter is mounted on the bypass module.