US 12,222,378 B2
Ripple detection device and ripple suppression device
Qia Wang, Guangdong (CN); Jianping Zhou, Guangdong (CN); Guoxian Lin, Guangdong (CN); Shanshan Fan, Guangdong (CN); Ben E, Guangdong (CN); Wei Zhang, Guangdong (CN); and Mingming Liu, Guangdong (CN)
Assigned to ZTE CORPORATION, Guangdong (CN)
Appl. No. 18/013,236
Filed by ZTE CORPORATION, Guangdong (CN)
PCT Filed Jun. 28, 2021, PCT No. PCT/CN2021/102694
§ 371(c)(1), (2) Date Dec. 27, 2022,
PCT Pub. No. WO2022/001938, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 202010602401.X (CN), filed on Jun. 28, 2020.
Prior Publication US 2023/0273247 A1, Aug. 31, 2023
Int. Cl. H02M 1/14 (2006.01); G01R 19/25 (2006.01)
CPC G01R 19/2509 (2013.01) [G01R 19/2513 (2013.01); H02M 1/14 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A ripple detection device, comprising: a ripple sampling unit, at least two DC sampling units, and a digital signal processing unit,
wherein the ripple sampling unit includes at least two input ports and an output port, an i-th input port of the ripple sampling unit is connected to an i-th port of a non-isolated DC/DC bidirectional energy conversion unit, and the output port of the ripple sampling unit is connected to an input port of the digital signal processing unit, where i is an integer greater than or equal to 1;
one of the at least two DC sampling units includes an input port and an output port, the input port of the DC sampling unit is connected to a port of the non-isolated DC/DC bidirectional energy conversion unit, and the output port of the DC sampling unit is connected to an input port of the digital signal processing unit;
wherein the ripple sampling unit is configured to output a first voltage signal at an output port of the non-isolated DC/DC bidirectional energy conversion unit to the digital signal processing unit;
each of the DC sampling units is configured to output a first DC signal in a second voltage signal at the connected port of the non-isolated DC/DC bidirectional energy conversion unit to the digital signal processing unit, and to block an AC signal in the second voltage signal to be output to the digital signal processing unit;
the digital signal processing unit is configured to determine a ripple noise signal at the output port of the non-isolated DC/DC bidirectional energy conversion unit according to the first voltage signal and the first DC signal.