COOLING SYSTEM OF ELECTRIC TURBO-CHARGER

摘要

Disclosed is a cooling apparatus of an electric turbocharger. According to the present invention, the cooling apparatus of an electric turbocharger has an electric motor installed on a shaft connecting a turbine wheel and a compressor wheel inside a center housing, and comprises: a coolant supply flow path allowing a coolant supplied from an engine to be supplied to a cooling fin chamber, which is formed at one side inside the center housing, through a radiator; a coolant discharge flow path discharging the coolant from the cooling fin chamber to the engine again; a coolant chamber formed at the other side inside the center housing, and penetrated by the shaft; a first bypass flow path bypass-connecting the coolant supply flow path and the coolant chamber; a second bypass flow path bypass-connecting the coolant discharge flow path and the coolant chamber; a pump impeller positioned inside the coolant chamber, installed on the shaft, and pumping the coolant inside the coolant chamber depending on the driving of the electric motor; and a first and a second shutoff valve installed on one side of the coolant supply flow path and the coolant discharge flow path respectively.