Lg Electronics Inc.

Rwth Aachen

Murat Senol

Rik W De Doncker

Junyoung Lim

Dongcheol Lee

Yohan Park

Youngjin Kim

Jungbum Kim

Anyeol Jung

Dongyup Lee

Rik De Doncker

A circuit assembly for linking different electrical voltage levels in a motor vehicle, comprising: an electric machine containing induction coils in a star circuit connection with a star point; a first switch unit containing switch elements for generating an AC voltage for the electric machine from a DC voltage of a first voltage level; a DC voltage of a second voltage level; and a second switch unit for a bidirectional electrical energy flow between the DC voltage of the first voltage level and the DC voltage of the second voltage level, wherein the second switch unit has two switch elements arranged in series in an auxiliary switch branch, wherein the auxiliary switch branch is connected in parallel to the DC voltage of the first voltage level, and each connection of the switch elements is connected to the star point.

Circuit assembly for linking different electrical voltage levels, as well as control method

A charging apparatus and an electric vehicle including the same are disclosed. The charging apparatus includes a converter for, in a charging mode, converting an input alternating current (AC) voltage into a direct current (DC) voltage and a controller for controlling the converter. The converter includes a motor and a switching unit that is connected to an additional coil wound on a stator of one phase of the motor, and that supplies the input AC voltage to the motor by performing a switching operation. The converter also includes an inverter that, in a motor operation mode, converts a DC voltage from a battery into an AC voltage by a switching operation and drives the motor. In the charging mode, the inverter converts the input AC voltage into the DC voltage using the additional coil of the motor and the switching unit and supplies the DC voltage to the battery.

Charging apparatus and electric vehicle including the same

A charging apparatus and an electric vehicle including the same are disclosed. The charging apparatus includes a converter for, in a charging mode, converting an input alternating current (AC) voltage into a direct current (DC) voltage, and a controller for controlling the converter. The converter includes a motor, and a switching unit for supplying the input AC voltage to the motor by performing a switching operation. The converter also includes an inverter for, in a motor operation mode, converting a DC voltage from a battery into an AC voltage by performing a switching operation of three-phase switching elements and driving the motor. In the charging mode, the inverter operates switching elements of at least one phase of the three-phase switching elements and converts the voltage received from the motor into a predetermined DC voltage.

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Seoul, South Korea

Murat Senol