Samsung Electro-mechanics Co., Ltd.

Wits Co., Ltd.

Sungkyunkwan University

Young Woon Choi

In Wha Jeong

Se Joo Kim

Ki Hong Kim

Tae Won Heo

Sang Won Lee

Sang Ho Cho

Byoung Woo Ryu

Young Seung Roh

Hyo Young Kim

Seong Wook Choi

Tae Seok Ko

Joung Ho Son

Jiho Lee

Su Jong Kim

Doo Young Song

Hyewon Shin

There is a stack visualization method using a stack visualization apparatus including a deposition head. The method comprises collecting a moving speed of the deposition head; collecting laser power information of the deposition head by which a laser is irradiated to a stack; selecting a virtual stack corresponding to the moving speed of the deposition head and the laser power information among a plurality of previously stored virtual stacks based on the moving speed of the deposition head and the laser power information; and visualizing the selected virtual stack through a digital twin model.

Stack visualization method, apparatus, and computer-readable recording medium storing instructions to perform stack visualization method

A wireless power transmission apparatus includes: an alternating current (AC) power output to convert input power into AC power and output the AC power; and a power transmitter including a plurality of resonators. The power transmitter receives the AC power and wirelessly transmits the AC power in a first operating mode in which two of the resonators are connected in series and the two resonators transmit the AC power, and in a second operating mode in which one of the resonators transmits the AC power.

Wireless power transmission apparatus

A wireless power transmitter includes a switch circuit including switches connected to a transmission resonator; a current detector configured to detect a transient current induced in the transmission resonator; and a controller configured to control the switch circuit and adjust an output of the wireless power transmitter based on an amplitude of the transient current.

Wireless power transmitter and method of controlling the same

A drive signal generating apparatus includes a transducer configured to convert electromagnetic energy of a signal received through a first port into a different type of energy, convert the different type of energy into electromagnetic energy, and transfer the converted electromagnetic energy to a second port, and a switching circuit configured to perform a gate switching operation, upon receiving a signal from the second port, to generate a drive signal.

Drive signal generating apparatus

A coil module includes a magnetic substance plate, a first coil, and a second coil. The magnetic substance plate includes a first area having a first magnetic permeability and a second area having a second magnetic permeability. The first coil is disposed on a surface of the magnetic substance plate. The second coil is disposed on the surface of the magnetic substance plate and partially overlapping the first coil. A portion of the first coil, not overlapping the second coil, is disposed on a surface of the first area, and a portion of the second coil, not overlapping the first coil, is disposed on a surface of the second area.

Coil module and wireless power transmission device using the same

A wireless power transmitter includes a common bridge circuit configured to apply a first alternating current (AC) voltage to a terminal of each of a first resonator and a second resonator of the resonators, a first sub-bridge circuit configured to apply a second alternating current (AC) voltage to another terminal of the first resonator while the first alternating current (AC) voltage is being applied to the terminal of the first resonator, and a second sub-bridge circuit configured to apply a third alternating current (AC) voltage to another terminal of the second resonator while the first alternating current (AC) voltage is being applied to the terminal of the first resonator.

Wireless power transmitter and method for controlling the same

A wireless power transmitting device includes: a rectifier configured to rectify alternating current (AC) power; a capacitor configured to store the rectified AC power as direct current (DC) power; a voltage divider configured to divide a voltage of the DC power; and a wireless power transmitter configured to wirelessly transmit power using the voltage divided by the voltage divider.

Wireless power transmitting device

There is provided a switching mode power supply including: a direct current (DC)/DC converting unit converting a DC power level; an auxiliary power supply unit discharged in a no load mode in which a load is not connected to an output terminal of the DC/DC converting unit; and a controlling unit sensing a change in impedance according to whether or not the load is connected to the output terminal to thereby determine whether or not the switching mode power supply is in the no load mode, and driving a pulse width modulation integrated chip (PWM IC) when a voltage level of the auxiliary power supply unit is at a preset level or less in the no load mode.

Growing community of inventors

Suwon-si, South Korea

Young Woon Choi