Lsis Co., Ltd.

Ls Mtron Ltd.

Jin-Kyu Yang

Jong-Seo Yoon

Yoea-Sang Yoon

A device for protecting an inverter include a first power switch configured to be turned on when a first voltage signal from a first switch of a safety relay is applied thereto; a second power switch connected in series with the first power switch, wherein the second power switch is configured to be turned on when a second voltage signal from a second switch of a safety relay is applied thereto; and a power line for connecting the first power switch and the second power switch to each other in series and for connecting the series of the first power switch and the second power switch to a buffer of the inverter, wherein a third voltage signal is applied via the power line to the buffer.

Device for protecting inverter using a buffer operating according to a state of a safety relay

A parameter determining apparatus for estimating temperature of a switching element of an inverter is disclosed. The parameter determining apparatus of the present disclosure includes an inverter unit including a power semiconductor module configured with at least one or more switching elements, and a control unit configured to determine an initial collector-emitter voltage of each of the switching elements and collector-emitter resistance of each thereof by linearizing a collector-emitter voltage of each of the switching elements at a certain temperature.

Parameter determining apparatus for estimating temperature of switching element of inverter

Disclosed herein are a method and an apparatus for generating a random PWM voltage reference signal for driving an inverter, which can more simply generate random position PWM (RPPWM) in which a position of an active vector is changed to achieve the same effect as when a switching frequency is changed.

Method and apparatus for generating PWM signal

Disclosed is an apparatus for manufacturing an electrolytic metal foil, which includes an electrolytic cell containing electrolyte; an upper drum installed in an upper portion of the electrolytic cell to be rotatable and to which a negative potential is applied; a lower drum soaked in the electrolyte of the electrolytic cell and installed to be rotatable together with the upper drum; a cathode belt mounted around outer circumferences of the upper and lower drums to move along an endless track and electrically connected to the upper drum so that the negative potential is applied thereto; and an anode unit installed to form a space from a metal electroplating surface of the cathode belt soaked in the electrolytic cell so that a positive potential is applied thereto, the anode unit having a slit for supplying the electrolytic to the space. This apparatus may increase a production rate of electrolytic metal foils.

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Gyeonggi-do, South Korea

Jin-Kyu Yang