Inverter-integrated electric compressor and circuit board, and method for manufacturing circuit board

Abstract

To improve the accuracy of detecting a current flowing through an electric compressor after operation of the electric compressor, the electric compressor having a large change in temperature before and after operation. An inverter-integrated electric compressor () that compresses and discharges a refrigerant suctioned therein, includes an inverter device () provided with a circuit board () mounted with an inverter circuit (), the inverter device () being integrally incorporated in an inverter case. The circuit board () is provided with a current detection circuit () that detects an input current flowing through the inverter circuit (), and an offset correction circuit (). The current detection circuit () includes a shunt resistor () that is serially connected to the inverter circuit () and detects a current, and a first amplifier () that amplifies and outputs a voltage appearing as a voltage drop in the shunt resistor (). The offset correction circuit () includes a second amplifier () that performs an offset correction of the first amplifier (). The first amplifier () and the second amplifier () are integrated into a single integrated circuit.