US 12,218,604 B2
Power converter, power conversion controller, and control method
Takumi Ito, Tokyo (JP); Kentaro Nabeshima, Tokyo (JP); and Masashi Nakamura, Tokyo (JP)
Assigned to TMEIC Corporation, Chuo-ku (JP)
Appl. No. 17/995,941
Filed by TMEIC Corporation, Chuo-ku (JP)
PCT Filed May 21, 2020, PCT No. PCT/JP2020/020172
§ 371(c)(1), (2) Date Oct. 11, 2022,
PCT Pub. No. WO2021/234923, PCT Pub. Date Nov. 25, 2021.
Prior Publication US 2023/0208308 A1, Jun. 29, 2023
Int. Cl. H02M 5/458 (2006.01)
CPC H02M 5/458 (2013.01) 6 Claims
OG exemplary drawing
 
1. A power converter comprising:
a converter that converts electric power supplied from a power supply side to DC power;
an inverter that is provided on an output side of the converter; and
a control unit configured to
calculate a control difference between a target value for a target control voltage in a DC section provided on the output side of the converter and a feedback value using a DC voltage of the DC section as the feedback value,
perform a nonlinear operation process on the control difference including a linear conversion to the control difference in a range where an absolute value of the control difference is less than a predetermined magnitude and a non-linear conversion to the control difference in a range where the absolute value of the control difference exceeds the predetermined magnitude, and
calculate an operation value based on a result of the nonlinear operation process and control the converter using the operation value.