Lg Electronics Inc.

Seungwoo Chae

Sanghyeon Kim

Jeongeon Oh

Jinho Cho

Taeyoung Park

A converter for an air conditioner includes a substrate, an inductor that is disposed in one side of the substrate and includes a core and a coil wound around the core, a switching element that is disposed in one side of the substrate and selectively controls a flow of a circuit, and a heat sink for absorbing heat generated from the switching element by contacting the switching element. A lead-in hole is formed in one side of the substrate, and at least a portion of the inductor is disposed in the lead-in hole, thereby quickly discharging the heat generated by the inverter and more efficiently using a space.

Converter

The present invention relates to a power conversion device and an air conditioner comprising the same. The power conversion device may include: an interleaved boost converter; a dc terminal capacitor; a load; and a controller for controlling the interleaved boost converter, wherein the controller controls the phase difference between a first boost converter and second boost converter of the interleaved boost converter so that the phase difference is a first phase difference in a first mode, and if a current ripple flowing in the dc terminal capacitor is a predetermined value or greater, the controller enters a second mode and controls the phase difference between the first boost converter and second boost converter so that the phase difference varies. Accordingly, the ripple current flowing into a capacitor disposed at the output terminal of an interleaved boost converter can be reduced.

Power conversion device and air conditioner comprising same

A circuit and a system may drive switching modules. The driving circuit and system are capable of controlling a detection level of a protection voltage of a switching module, by controlling a voltage of a detection circuit for detecting the protection voltage. This may be done based on control of a variable resistance.

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Seoul, South Korea

Seungwoo Chae