US 12,224,619 B2
Uninterruptible power supply apparatus
Ryogo Imanishi, Chuo-ku (JP); and Nobuyuki Momochi, Chuo-ku (JP)
Assigned to TMEIC Corporation, Chuo-ku (JP)
Appl. No. 18/250,182
Filed by TMEIC Corporation, Chuo-ku (JP)
PCT Filed Aug. 24, 2021, PCT No. PCT/JP2021/030957
§ 371(c)(1), (2) Date Apr. 21, 2023,
PCT Pub. No. WO2023/026357, PCT Pub. Date Mar. 2, 2023.
Prior Publication US 2024/0006911 A1, Jan. 4, 2024
Int. Cl. H02J 9/06 (2006.01)
CPC H02J 9/061 (2013.01) [H02J 9/068 (2020.01)] 4 Claims
OG exemplary drawing
 
1. 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 first control power supply includes a first DC/DC converter that converts the first DC power supply voltage into a second DC power supply voltage, and
the first controller includes
a first control circuit that operates upon receiving the second DC power supply voltage from the first DC/DC converter to thereby generate a control signal for controlling ON/OFF of the switch, and
a first driver that operates upon receiving the first DC power supply voltage from the power supply line to thereby drive the switch in accordance with the control signal output from the first control circuit.