US 12,136,826 B2
Method for performing wireless charging, wireless power transmission device, and storage medium
Kyungmin Lee, Suwon-si (KR); Kiyoung Kim, Suwon-si (KR); Gun-Woo Moon, Daejeon (KR); Young-Dal Lee, Daejeon (KR); Dongmin Kim, Daejeon (KR); and Jaeil Baek, Daejeon (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed on Oct. 18, 2021, as Appl. No. 17/503,642.
Application 17/503,642 is a continuation of application No. PCT/KR2020/004980, filed on Apr. 13, 2020.
Claims priority of application No. 10-2019-0045665 (KR), filed on Apr. 18, 2019.
Prior Publication US 2022/0037927 A1, Feb. 3, 2022
Int. Cl. H02J 50/12 (2016.01); H02J 50/80 (2016.01)
CPC H02J 50/12 (2016.02) [H02J 50/80 (2016.02)] 11 Claims
OG exemplary drawing
 
1. A wireless power transmission device, comprising:
a coil circuit configured to generate a power signal for transmission of power to an electronic device;
an inverter configured to convert direct current (DC) power into alternating current (AC) power and provide the AC power to the coil circuit;
a coil-type detection unit comprising a coil disposed adjacent to the coil circuit and configured to detect a signal corresponding to the power signal;
a control circuit configured to adjust a switching frequency of the inverter to change AC power output from the inverter based on the detected signal;
a power factor corrector comprising circuitry configured to output power factor-corrected DC power to the inverter; and
a pulse width modulator configured to vary a duty cycle,
wherein the control circuit is further configured to adjust the power factor-corrected DC power by varying the duty cycle by controlling the pulse width modulator and to control the switching frequency of the inverter within a designated frequency range.