Samsung Electro-mechanics Co., Ltd.

Hak Ryong Kim

Don Sik Kim

Tae Won Heo

Dong Joong Kim

Jong Pil Kim

Sang Cheol Bong

Jae Sun Won

Gun Woo Moon

Hugh Wook Kim

Myung Hyun Sung

Jae Suk Sung

Jong Han Kim

Woo Jin Lee

Hee Seung Kim

In Wha Jeong

Dong Seong Oh

Chong Eun Kim

Sung Soo Hong

Sang Kyoo Han

Chung Wook Roh

Chang Ik Kim

Dong Wook Lee

Soon Joung Yio

Ki Bum Park

Yong Woon Park

Do Heung Na

Tae Seok Yang

Kyu Min Cho

Dong Ryul Lee

Woo Sung Jung

Moo Jong Kang

Tae Young Ahn

Young Do Kim

In Ho Cho

Myeong Chan Kim

A power supply device may be capable of wirelessly transmitting power at a plurality of resonance frequencies. The power supply device may include: a power conversion unit converting input power into first power; and a wireless power supply unit varying a switching frequency for switching the first power and wirelessly transmitting the switched first power at at least one of a plurality of resonance frequencies.

Power supply device

A conductive plate and an electronic device including the same are provided. A conductive plate to be included in a terminal and disposed on a side of a coil substrate for wireless charging the terminal includes metal members each having a plate shape and an insulating layer disposed on a surface of at least one of the metal members to insulate the metal members from each other, wherein the metal members are coupled to each other to complete a flat plate shape.

Conductive plate and electronic device having the same

Charger for mobile devices for use in automobile

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

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

Suwon-si, South Korea

Hak Ryong Kim