Electric compressor

Abstract

An electric compressor (110) capable of discharging electric charges of a capacitor (C1, C2) is provided. The electric compressor (110) includes: a compressing unit (115); an electric motor (116) for rotating the compressing unit (115); a driving circuit (100) for driving the electric motor (116); a housing (112) for accommodating the compressing unit (115) and the electric motor (116); and an inverter cover (144) for accommodating the driving circuit (100). An outline of the electric compressor (110) is formed by the housing (112) and the inverter cover (144). The driving circuit (100) includes: an inverter circuit (14) for receiving electric power from a power supply line (PL); a capacitor circuit (4) connected between the power supply line (PL) and a ground line (SL); and an electrically discharging circuit, connected to the capacitor circuit (4), for discharging electric charges accumulated in the capacitor circuit (4). The electric compressor (110) further includes a capacitor cover (201), disposed inside the inverter cover (144), for encompassing and accommodating at least the capacitor circuit (4) and the electrically discharging circuit.

Description

technical field [0001] The present invention relates to an electric compressor, in particular to an electric compressor formed by integrally assembling a drive circuit for driving a motor. Background technique [0002] In recent years, as compressors mounted in vehicles such as hybrid vehicles, electric vehicles, and fuel cell vehicles, electric compressors in which a drive circuit for driving a motor is integrated for downsizing are being developed. In such an electric compressor, an inverter unit is installed in a housing in which an electric motor and a compression mechanism are built. [0003] Here, when a vehicle such as an automobile collides with an obstacle and a large force is applied to the electric compressor, the drive circuit for driving the electric motor housed in the inverter unit will be damaged and a relatively large electric charge will be accumulated. Capacitors may leak current. Therefore, techniques for preventing this leakage are disclosed. [0004]...

AI Technical Summary

Problems solved by technology

[0005] However, when a car collides with an obstacle, etc., it is difficult to predict in which direction and angle the electric compressor will be impacted in consideration of various collision patterns

Therefore, according to the technology disclosed in Japanese Patent Application Laid-Open No. 2010-148296, depending on the form of the collision, there may be problems that the discharge member intrudes into the capacitor inappropriately, the charge of the capacitor is not discharged, or it takes time until it is discharged.

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