Samsung Electro-Mechanics Co., Ltd.

Hyundai Motor Company

Kia Corporation

Incheon National Uni. Research & Business Fdn

Dong Joong Kim

Don Sik Kim

Tae Won Heo

Jong Pil Kim

Sang Cheol Bong

Gun Woo Moon

Hak Ryong Kim

Chong Eun Kim

Dong Wook Lee

Ki Bum Park

Dong Seong Oh

Kyu Min Cho

Jong Han Kim

Woo Jin Lee

Jae Sun Won

Yoon Sung Lee

Sa Heum Kim

Seung Min Oh

Ik Kyu Kim

Ji Eun Lee

Sang Kyoo Han

Sung Soo Hong

Chung Wook Roh

Seong Wook Choi

Yeol Mae Yeo

Do Heung Na

Myung Hyun Sung

Tae Young Ahn

Nam Hyeong Kim

Jun Hwa Park

Yeong Don Park

In Ho Cho

Su Hyun Lee

Kang Hyun Yi

Mei Hua Hong

Jun Young Mun

Young Do Kim

Disclosed are an anode material for lithium secondary batteries, the anode material including an Si-based anode active material and a film layer formed as a double self-assembled monolayer as the result of an amino trimethoxy silane (ATS) SAM precursor and a fluoro ethylene carbonate (FEC) SAM precursor being sequentially bonded to the surface of the Si-based anode active material, and method of manufacturing the same.

Anode material for lithium secondary batteries and method of manufacturing the same

There is provided a transformer improved in leakage inductance including: a core having first, second and third legs electromagnetically coupled to one another; a primary winding formed of a conductor having one end and another end receiving power from the outside and dividedly wound around the first, second and third legs; and a secondary winding wound around at least one of the first, second and third legs and receiving induced power by electromagnetic induction with the primary winding.

Transformer improved in leakage inductance

A load sharing device for load balancing among a plurality of power supply modules connected in parallel to a single load includes a common voltage control signal output unit and output voltage control units corresponding to the power supply modules, respectively. The common voltage control signal output unit generates a common voltage control signal from output voltages of the power supply modules and outputs the common voltage control signal to the power supply modules. The output voltage control units detect output currents of the power supply modules and control the output voltages of the power supply modules to be in a predetermined voltage range according to the common voltage control signal and the detected output currents.

Load sharing device and parallel power supply therewith

There is provided a variable switching frequency type power supply that can achieve high efficiency by fixing a switching duty cycle to 50% and varying switching frequency. A variable switching frequency type power supply according to an aspect of the invention may include: a switching unit switching input power; a transformation unit converting a voltage level of the power switched by the switching unit into a predetermined voltage level; a rectification unit rectifying the power converted by the transformation unit; and a control unit fixing a switching duty cycle of the switching unit to a predetermined switching duty cycle, and varying switching frequency of the switching unit according to a voltage level of output power.

Variable switching frequency type power supply

A phase shift full bridge converter with a reduced current stress includes: a switching unit that switches an input voltage; a transformer that includes a first capacitor serially connected to, and having a primary side and a secondary side; an auxiliary circuit unit that includes a first switch, a second switch, and a second capacitor, which are connected in parallel to the secondary side of the transformer; and a rectification unit that is connected to the auxiliary circuit unit, with an output inductor being removed.

Phase shift full bridge converter with reduced current stress

There is provided a bridgeless power factor correction circuit that corrects a power factor by complementarily switching two switches according to phase of input power without using rectifier bridge diodes. A bridgeless power factor correction circuit according to an aspect of the invention may include: a switching unit having a plurality of switches and alternately switching input AC power; a stabilizing unit rectifying and smoothing the power switched by the switching unit; and a control unit controlling an alternate switching operation between the plurality of switches according to phases of the input power.

Bridgeless power factor correction circuit

In accordance with the present invention, the switching power supply device using a current sharing transformer includes an inverter switching unit for switching an input voltage; a set of share inductors connected to the inverter switching unit for distributing a current applied by the inverter switching unit; first and second transformers of which each primary side connected to the set of share inductors is connected in parallel to each other; and a rectifying unit connected to secondary sides of the first and second transformers.

Switching power supply device using current sharing transformer

Provided is a transformer having resonant inductance, the transformer including a core that includes a first leg formed in one side thereof, a second leg which is formed in the other side thereof so as to be electromagnetically coupled to the first leg, and a third leg which is formed between the first and second legs so as to be electromagnetically coupled to the first and second legs; a primary winding that is wound around one side of the third leg; a secondary winding that is wound around the other side of the third leg so as to induce power through electromagnetic induction with the primary winding; and a resonant inductance winding that is wound around the outside of the core so as not to be magnetically induced by magnetic fluxes generated from the primary and secondary windings.

Transformer having resonant inductance

Growing community of inventors

Gyeonggi-do, South Korea

Dong Joong Kim