US 11,984,723 B2
Multi-mode power supply system
Takuya Kataoka, Tokyo (JP); Kikuo Izumi, Tokyo (JP); Yusuke Higaki, Tokyo (JP); Takushi Jimichi, Tokyo (JP); and Tsuguhiro Takuno, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/603,341
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jun. 5, 2019, PCT No. PCT/JP2019/022381
§ 371(c)(1), (2) Date Oct. 13, 2021,
PCT Pub. No. WO2020/245951, PCT Pub. Date Dec. 10, 2020.
Prior Publication US 2022/0181879 A1, Jun. 9, 2022
Int. Cl. H02J 3/12 (2006.01); G05B 15/02 (2006.01); H02M 7/04 (2006.01)
CPC H02J 3/12 (2013.01) [G05B 15/02 (2013.01); H02M 7/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A power supply system to supply power to a load, the power supply system comprising:
a converter to convert AC power or DC power received from a main power source into power with a voltage in accordance with a voltage command value and supply the converted power to the load;
a detector to detect an operating state of the load; and
a controller to operate in an operation mode selected from among a plurality of operation modes and generate the voltage command value,
the operation modes including
a first mode in which the voltage command value is generated based on the operating state of the load detected by the detector such that power consumption of the load is reduced, and
a second mode in which the voltage command value is a fixed value that is generated based on predetermined setting information or external command information acquired from an external device such that there is no excess or deficiency of the voltage of the power output from the converter, and
the converter converting AC power or DC power received from the main power source into DC power with a voltage in accordance with the voltage command value and supplying the converted DC power to the load,
wherein the controller selects the second mode when a sudden change of the operating state of the load is detected, and the controller selects the first mode when it is detected that the operating state of the load has shifted to a steady operation.