US 11,722,072 B2
Inverter circuit control method and device thereof
Houlai Geng, Hefei (CN); Xing Li, Hefei (CN); Menglin Cao, Hefei (CN); and Lin Cheng, Hefei (CN)
Assigned to Sungrow Power Supply Co., Ltd., Hefei (CN)
Filed by Sungrow Power Supply Co., Ltd., Hefei (CN)
Filed on Feb. 4, 2022, as Appl. No. 17/592,544.
Claims priority of application No. 202110394426.X (CN), filed on Apr. 13, 2021.
Prior Publication US 2022/0329176 A1, Oct. 13, 2022
Int. Cl. H02M 7/49 (2007.01); H02M 7/483 (2007.01); H02M 7/501 (2007.01)
CPC H02M 7/501 (2013.01) [H02M 7/49 (2013.01); H02J 2300/24 (2020.01)] 20 Claims
OG exemplary drawing
 
1. An inverter circuit control method comprising:
determining a direct current DC bus voltage and an output leakage current of a target inverter circuit;
determining, according to the DC bus voltage, whether the target inverter circuit satisfies a preset modulation condition; and
adjusting, according to the DC bus voltage or the output leakage current, a modulation harmonic wave to be injected into a sinusoidal pulse width modulation (SPWM) signal in a case that the target inverter circuit satisfies the preset modulation condition, such that total harmonic distortion of a current of the target inverter circuit is within a preset range.