US 12,463,648 B2
Phase synchronization control circuit and power conversion device using the same
Daiki Mori, Chuo-ku (JP); Masamichi Kano, Chuo-ku (JP); and Kazunori Sanada, Chuo-ku (JP)
Assigned to TMEIC CORPORATION, Tokyo (JP)
Appl. No. 18/682,053
Filed by TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Tokyo (JP)
PCT Filed Jun. 17, 2022, PCT No. PCT/JP2022/024374
§ 371(c)(1), (2) Date Feb. 7, 2024,
PCT Pub. No. WO2023/243091, PCT Pub. Date Dec. 21, 2023.
Prior Publication US 2025/0007524 A1, Jan. 2, 2025
Int. Cl. H02M 1/08 (2006.01); H02J 9/06 (2006.01); H03L 7/085 (2006.01)
CPC H03L 7/085 (2013.01) [H02J 9/062 (2013.01); H02M 1/08 (2013.01)] 13 Claims
OG exemplary drawing
 
8. A phase synchronization control circuit that generates a second alternating-current signal in phase with a first alternating-current signal, comprising:
a phase difference detector that detects a phase difference between the first and second alternating-current signals;
a frequency control circuit that generates a first frequency control value to eliminate the phase difference;
an amount-of-change limiter that limits an amount of change of the first frequency control value per unit time to fall within a limit range to generate a second frequency control value; and
an alternating-current signal generation circuit that generates the second alternating-current signal with a frequency of a value corresponding to the second frequency control value.