US 12,081,112 B2
Power conversion device
Takuya Kajiyama, Tokyo (JP); Toshiyuki Fujii, Tokyo (JP); Shuhei Fujiwara, Tokyo (JP); Ryosuke Uda, Tokyo (JP); and Shigeo Hayashi, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/785,596
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Dec. 25, 2019, PCT No. PCT/JP2019/050873
§ 371(c)(1), (2) Date Jun. 15, 2022,
PCT Pub. No. WO2021/130911, PCT Pub. Date Jul. 1, 2021.
Prior Publication US 2023/0018083 A1, Jan. 19, 2023
Int. Cl. H02M 1/12 (2006.01); H02M 1/00 (2006.01); H02M 1/32 (2007.01); H02M 7/483 (2007.01); H02M 7/5395 (2006.01)
CPC H02M 1/12 (2013.01) [H02M 1/0025 (2021.05); H02M 1/325 (2021.05); H02M 7/4833 (2021.05); H02M 7/4835 (2021.05); H02M 7/5395 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A power conversion device comprising:
a power converter including at least one arm having a plurality of converter cells cascaded to each; and
a control device to control the power converter,
each of the converter cells including
a pair of input/output terminals,
a plurality of switching elements, and
a power storage element electrically connected to the input/output terminals through the switching elements,
the control device including
an individual cell controller to generate a control signal for controlling on and off of the switching elements of each of the converter cells,
wherein the individual cell controller generates the control signal by pulse width modulation control based on a modulation command signal including an AC component having a predetermined first frequency and corresponding to a command value of an output voltage between the input/output terminals, in each converter cell, such that a harmonic component included in the output voltage and having a predetermined frequency that is an integer multiple of the first frequency is suppressed.