Lg Electronics Inc.

Gilsu Lee

Kyunghoon Lee

Sungbae Song

Jungdae Lee

Naechun Park

Jongwon Kim

Namjoon Cho

Taejin Kim

Jaeyoon Oh

Sanggi Ko

The present specification relates to a motor control device, a motor control system, and a motor control method. The motor control device measures a ripple voltage of a DC link capacitor to determine an appropriate switching frequency according to the ripple voltage, and causes a plurality of arithmetic processing units to selectively control a switching operation of the switching unit according to the determined switching frequency.

Motor control device, motor control system, and motor control method

A power module of the present invention includes a power device for converting and outputting a frequency of an input power source, and a housing accommodating the power device therein and forming flow paths for a cooling fluid on both sides of the power device such that the cooling fluid can contact both sides of the power device. Accordingly, both plate surfaces of the power device can be in direct contact with the cooling fluid so as to be quickly cooled.

Power module and manufacturing method therefor, and inverter apparatus having power module

Embodiments provide a printed circuit board including a copper foil layer to form a circuit pattern on a base layer, and an insulation layer laminated on the copper foil layer, and wherein the circuit pattern includes a solder pattern, to which an inverter switch element is soldered to supply drive power to a motor, a heat radiation pattern spaced apart from the solder pattern and to contact with one surface of the inverter switch element so as to absorb and radiate heat in the inverter switch element, a heat circulation pattern, through which the heat absorbed by the heat radiation pattern is circulated, and an element pattern formed on both sides of the heat circulation pattern to allow a thermistor element, a resistance value of which is varied according to the heat, to be soldered to the element pattern.

Printed circuit board and motor drive apparatus including the printed circuit board

A motor driving apparatus including a motor including a stator and a rotor rotating in the stator, an inverter configured to supply a driving voltage to a stator coil wound on the stator so as to rotate the rotor, and a control unit configured to, when a target command value is received, change a predetermined reference start-up time point to a start-up time point corresponding to an electrical angle position of the rotor in correspondence with the target command value per rotation of the rotor and to control the inverter to supply the driving voltage at the start-up time point.

Motor driving apparatus

Methods and apparatus for controlling an inverter of a motor driving apparatus

Growing community of inventors

Seoul, South Korea

Gilsu Lee