Lsis Co., Ltd.

Seoul National University

Ls Industrial Systems Co., Ltd.

Chun Suk Yang

Byung Woon Jang

Woo Sup Kim

Jae Ho Lee

Jae Hoon Jang

Jong In Sun

Sun Woo Lee

Ho Sang Jin

Chan Gi Park

Joong Ki Jung

Deokyoung Lim

Bo Hyung Cho

Bo Hyun Youn

Hu Jin Lee

Seoung Woon Lee

Deok Young Lim

A method for controlling temperature of an inverter system having an inverter and a cooling fan is provided, the method including: obtaining an internal temperature of the inverter and a DC (Direct Current)-link voltage of the inverter; and outputting a fan driving control signal for driving the fan or maintaining the fan being driven to the fan, when the internal temperature is above a predetermined fan drive setting temperature and the DC-link voltage is above a predetermined fan drive setting voltage.

Method for controlling temperature of inverter system by controlling a fan

According to an embodiment, a method of controlling an inverter including a rectification unit rectifying inputted AC power to DC power, a smoothing unit smoothing the DC power, and a power conversion unit received the DC power from the smoothing unit to convert the received DC power into AC power having a predetermined size and frequency, the method includes receiving an abnormal signal of the inverter or an electric motor for driving the inverter, determining whether a DC terminal voltage of the smoothing unit is equal to or greater than a low voltage failure level when the abnormal signal is received, determining whether the power conversion unit is operating, and blocking current output of the power conversion unit when the DC terminal voltage is equal to or greater than the low voltage failure level and the power conversion unit is operating.

Method of controlling an inverter

An inverter-charger integrated device for an electric vehicle is provided. The inverter-charger integrated device for the electric vehicle includes a motor; a power input unit; a rectifying unit; an inverter; and a control unit, wherein the inverter comprises a first group of switches including first and second switches, a second group of switches including third and fourth switches, and a third group of switches including fifth and sixth switches, the rectifying unit is directly connected to the first of the first to third groups of switches, and phases of the motor are respectively connected to the first to third group of switches.

Inverter-charger integrated device for electric vehicle

Disclosed is an inverter assembly without galvanic isolation, the inverter assembly including a PCB mounted with a power supply circuit unit, an inverter unit, an analogue circuit unit and a controller, a first ground circuit pattern to supply a ground power to the power supply circuit unit and the inverter unit, a second ground circuit pattern to supply the ground power to the analogue circuit unit, a third ground circuit pattern to supply the ground power to the controller, a first bead between the first ground circuit pattern and the second ground circuit pattern to isolate an impedance between the first ground circuit pattern and the second ground circuit pattern, and a second bead between the second ground circuit pattern and the third ground circuit pattern to isolate an impedance between the second ground circuit pattern and the third ground circuit pattern.

Inverter assembly without galvanic isolation

Disclosed is an inverter-charger combined device for electric vehicles configured to drive a 3-phase motor by charging a high voltage battery in case of charging mode, and switching a power of the high voltage battery in case of operation mode, the device including a first power supply unit for supplying a power to drive a switching unit of the rectifier, and a second power supply unit for supplying a power to drive a switching unit of the inverter, where the first power supply unit and the second power supply unit are configured to independently supply a power.

Inverter-charger combined device for electric vehicles and method thereof

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

An inverter is provided. The inverter includes a current providing unit providing a first axis current and a second axis current to an induction motor; a revolutions per minute (RPM) measuring unit measuring the RPM of the induction motor; and a control unit changing the second axis current according to the measured RPM.

Inverter and method of controlling same

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

Provided are a switching device for an electric vehicle and a method of controlling the switching device. The switching device includes a switch, a signal selection part, an inverter, and a controller. The switch generates a first or second switching signal according to an operation mode. The signal selection part receives the first or second switching signal, and selects the first or second switching signal according to the operation mode to output the selected switching signal. The inverter performs a direct current/alternating current conversion process on power according to the switching signal output from the signal selection part, and outputs the power. The controller determines the operation mode, and generates a control signal according to the operation mode such that the signal selection part selects the first or second switching signal.

Switching device for electric vehicle and method of controlling the switching device

Disclosed is a charger including a first rectifying portion that rectifies an alternating power and outputs the rectified power to a neutral point of a 3-phase motor; a second rectifying portion/inverter that charges output power of the first rectifying portion in a high-voltage battery in a charging mode and drives the 3-phase motor by switching the charged power of the high-voltage battery in a drive mode; a high-voltage charging controller that controls the first rectifying portion and second rectifying portion/inverter so as to charge the high-voltage battery in the charging mode; and a DSP (Digital Signal Processor) that controls the second rectifying portion/inverter so as to drive the 3-phase motor in the drive mode, and controls the high-voltage charging controller so as to charge the high-voltage battery in the charging mode.

Growing community of inventors

Seongnam-si, South Korea

Chun Suk Yang