US 12,308,645 B2
Alternating-current power harmonic-based circuit state detection
Xiaohu Zhou, Sunnyvale, CA (US); and Dayu Qu, Cupertino, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 18/556,036
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Sep. 13, 2022, PCT No. PCT/US2022/076371
§ 371(c)(1), (2) Date Oct. 18, 2023,
PCT Pub. No. WO2024/058805, PCT Pub. Date Mar. 21, 2024.
Prior Publication US 2025/0079841 A1, Mar. 6, 2025
Int. Cl. H02J 3/01 (2006.01); H02J 1/00 (2006.01); H02J 3/00 (2006.01); H02J 3/14 (2006.01); H04N 7/18 (2006.01)
CPC H02J 3/01 (2013.01) [H02J 1/002 (2020.01); H02J 3/0012 (2020.01); H02J 3/14 (2013.01); H02J 2310/12 (2020.01); H04N 7/186 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a first current input/output (I/O) node configured to receive alternating current (AC) power;
a second current I/O node configured to receive the AC power;
a passive component comprising a first terminal coupled to the first current I/O node;
a bypass circuit comprising a first terminal coupled to the first terminal of the passive component, a second terminal coupled to a second terminal of the passive component, and a switch coupled between the first terminal and second terminal of the bypass circuit; and
a controller comprising a first terminal coupled to the second terminal of the passive component and the second terminal of the bypass circuit, a second terminal coupled to the second current I/O node, and an AC power harmonic-based circuit state detector configured to:
convert an AC voltage of the AC power received at the first terminal and second terminal of the controller to a direct current (DC) voltage;
filter the DC voltage to obtain a voltage of a harmonic of the AC power received at the first terminal and the second terminal of the controller;
compare the voltage of the harmonic of the AC power to a voltage threshold; and
determine a state of the bypass circuit based on the comparison of the voltage of the harmonic of the AC power to the voltage threshold.