US 12,231,061 B2
Power conversion system
Yasunori Ido, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/776,672
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Dec. 17, 2019, PCT No. PCT/JP2019/049464
§ 371(c)(1), (2) Date May 13, 2022,
PCT Pub. No. WO2021/124459, PCT Pub. Date Jun. 24, 2021.
Prior Publication US 2022/0399831 A1, Dec. 15, 2022
Int. Cl. H02M 7/49 (2007.01); H02M 1/00 (2007.01)
CPC H02M 7/49 (2013.01) [H02M 1/0003 (2021.05)] 9 Claims
OG exemplary drawing
 
1. A power conversion system comprising:
power conversion circuitry including a plurality of submodules connected in series to each other;
a host device to control each submodule included in the power conversion circuitry;
a terminal device to display internal information about each submodule; and
at least one repeating device to relay communication between the host device and each submodule and communication between the terminal device and each submodule, wherein
the repeating device
receives, from one or more submodules communicating with the repeating device, internal information about the submodules,
transmits, to the host device with a first cycle period, a first communication frame including aggregate information that is an aggregate of the received internal information, and
transmits, to the terminal device with a second cycle period longer than the first cycle period, a second communication frame including internal information selected from the received internal information,
stores the received internal information in a first memory, and
selects, from the internal information stored in the first memory, internal information satisfying a request from the terminal device,
wherein the repeating device generates the aggregate information by aggregating the internal information stored in the first memory, wherein
a cycle period for an internal process performed by the repeating device is shorter than the first cycle period, and
the internal process includes:
a first process performed by the repeating device to store, in a second memory, command information received from the host device;
a second process performed by the repeating device to generate the aggregate information based on the internal information stored in the first memory and store the aggregate information in a third memory; and
a third process performed by the repeating device to select internal information satisfying the request from the internal information stored in the first memory, and store the selected internal information in a fourth memory.