Lsis Co., Ltd.

Lg Electronics Inc.

Seoul National University

Woo Sup Kim

Jae Ho Lee

Chun Suk Yang

Chul Woo Park

Jong In Sun

Hong Tae Park

Young Min Kim

Jun Seok Eom

Jae Beom Kim

Sung Sik Park

Ki Hyun Yoon

Bo Hyung Cho

Bo Hyun Youn

Seoung Woon Lee

Seok Eom Jun

Dong Su Lee

A reverse battery protection device and an operating method thereof are provided. The reverse battery protection device includes a signal generating unit measuring a voltage of a battery, and, when the measured voltage is not smaller than a reference voltage, generating an electrical signal, a signal converting unit converting the generated electrical signal into a DC voltage, and a switch unit switching to allow a current to flow between the battery and a converter, when the converted DC voltage is received.

Reverse battery protection device and operating method thereof

A power conversion device for charging first and second batteries is provided. The power conversion device includes an input unit, a first power conversion unit, a second power conversion unit, a third power conversion unit, and a switching unit connecting the first power conversion unit to the second power conversion unit in the first operation mode according to a control signal supplied from the outside, the switching unit connecting the second power conversion unit to the third power conversion unit in the second operation mode according to the control signal supplied from the outside.

Power conversion device

A low voltage DC/DC converter (LDC) control apparatus for controlling an LDC including a transformer and a PWM controller is provided. The low voltage DC/DC converter (LDC) control apparatus includes an input current calculating unit calculating an input current of the LDC by using magnetization inductance information on the transformer and effective duty information on the PWM controller; an output current calculating unit calculating the instantaneous value and average value of an output current based on the input current calculated by the input current calculating unit; and an LDC control unit generating a control signal for over current protection (OCP) or power limit based on the instantaneous value and average value of the output current calculated by the output current calculating unit, wherein the LDC control unit outputs the generated control signal to the PWM controller.

Apparatus and method for controlling low voltage DC/DC converter by using input current information on low voltage DC/DC converter

A transformer module for an electric vehicle is provided. The transformer module includes a bobbin round which a primary-side coil is wound, a printed circuit board, and a secondary-side bus bar disposed between the bobbin and the printed circuit board, wherein a pattern part formed of an electrically conductive material to contact the bus bar is provided on the printed circuit board to electrically connect the pattern part to the bus bar in parallel.

Transformer module for electric vehicle

A driving device of a synchronous rectification apparatus is provided. The driving device includes a voltage detection part disposed on a power input terminal to detect a voltage value of a power inputted through the power input terminal, an adjustment part receiving the voltage value detected through the voltage detection part, the adjustment part adjusting the receive voltage value to output the adjusted voltage value, and a comparison part receiving the voltage value adjusted through the adjustment part into a positive terminal and a synchronous rectification starting value into a negative terminal, the comparison part outputting an command value of the synchronous rectification apparatus, which is obtained by comparing the received voltage value with the synchronous rectification starting value.

Driving device of synchronous rectification apparatus

Provided is an apparatus for charging battery in electric vehicle that includes a DC-DC converter unit formed in two channels for converting a charge of the low voltage battery to a power source by receiving a power source from the high voltage battery.

Apparatus for charging battery in electric vehicle

Disclosed is a DC-DC converter. The DC-DC converter includes a power input unit to which power is applied, a first module comprising a first transformer and a second transformer to output a first output power transformed according to operations of a first switch and a second switch connected with the first transformer and the second transformer by using the applied power, a second module comprising a third transformer and a fourth transformer to output a second output power transformed according to operations of a third switch and a fourth switch connected with the third transformer and the fourth transformer by using the applied power, an output unit to output a sum of the first output power and the second output power, and a controller to control an interleaving operations between the first module and the second module.

DC-DC converter utilizing output power to turn off switches

The embodiment relates to a transformer. A transformer according to an aspect includes: a first coil assembly including a first core, a first bobbin coupled to the first core, and a first coil provided on the first bobbin; and a second coil assembly coupled to the first coil assembly, and including a second core, a second bobbin coupled to the second core, and a second coil provided on the second bobbin.

Transformer

A low temperature sintering microwave dielectric composition which can be sintered at a temperature of below 1250.degree. C. The composition includes a composition of xLiO.sub.1/2 --yCaO--.sub.z SmO.sub.3/2 --wTiO.sub.2 --qBO.sub.3/2 where 13.00.ltoreq.x.ltoreq.16.00, 11.00.ltoreq.y.ltoreq.13.00, 18.00.ltoreq.z.ltoreq.21.00, 45.00.ltoreq.w.ltoreq.51.00 and 0&lt;q.ltoreq.12.0 wherein the numeric values are based on mol % with respect to the entire composition.

Growing community of inventors

Seoul, South Korea

Woo Sup Kim