US 12,413,135 B2
DC power supply and distribution system
Yusuke Kato, Tokyo (JP); Takuya Kataoka, Tokyo (JP); Tomoyuki Kawakami, Tokyo (JP); and Kikuo Izumi, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/276,045
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Feb. 26, 2021, PCT No. PCT/JP2021/007333
§ 371(c)(1), (2) Date Aug. 7, 2023,
PCT Pub. No. WO2022/180781, PCT Pub. Date Sep. 1, 2022.
Prior Publication US 2024/0106316 A1, Mar. 28, 2024
Int. Cl. H02M 1/00 (2007.01); H02M 3/155 (2006.01); H02M 3/335 (2006.01); H02M 7/08 (2006.01); H02M 7/23 (2006.01)
CPC H02M 1/007 (2021.05) [H02M 1/0032 (2021.05); H02M 7/23 (2013.01); H02M 3/155 (2013.01); H02M 3/335 (2013.01); H02M 7/08 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A DC power supply and distribution system comprising:
a power converter including a main AC/DC converter and an auxiliary AC/DC converter connected in parallel to the main AC/DC converter and characterized by a rated power capacity smaller than that of the main AC/DC converter for converting AC power inputted from an AC system into DC power to output it to a DC system;
switching command generating circuitry for controlling the power converter on the basis of DC output power outputted by the power converter; and
a DC/DC converter including a first DC/DC converting circuitry connected to the DC system and a DC power supply, and DC/DC conversion controlling circuitry for controlling the first DC/DC converting circuitry,
wherein under an assumption that an operation mode in which the main AC/DC converter is in an operating state and the auxiliary AC/DC converter is in a stopped state is a first operation mode, and an operation mode in which the main AC/DC converter is in a stopped state and the auxiliary AC/DC converter is in an operating state is a second operation mode, when the power converter is in the first operation mode and an absolute value of the DC output power outputted by the power converter is smaller than an absolute value of a threshold power set smaller than the rated power capacity of the auxiliary AC/DC converter, the switching command generating circuitry generates, for the power converter, a first switching command that is a switching command for switching from the first operation mode to the second operation mode, and when a voltage of the DC system is outside a preset first voltage range, the DC/DC conversion controlling circuitry controls the first DC/DC converting circuitry so as to supply charge/discharge power from the DC power supply to the DC system in such a way the voltage of the DC system is within the first voltage range.