Apparatus for inspecting electric components for inverter circuit.

摘要

An apparatus for inspecting an electric component in an inverter circuit has a DC power supply 14 for supplying a direct current to a given position in an inverter circuit, a voltage detector 16 for detecting a voltage at a given position in the inverter circuit, a current detector 18 for detecting a current flowing at a given position in the inverter circuit, a switching circuit 24 for changing positions at which the direct current is supplied from the DC power supply 14, positions at which the voltage is detected by the voltage detector 16, and positions at which the current is detected by the current detector 18, and a controller 26 for outputting a switching signal to the switching circuit 24. The switching circuit 24 is controlled by the controller 26 to charge an electrolytic capacitor in an inverter circuit with a current from the DC power supply 14. The electrolytic capacitor is determined as to its quality by determining whether the calculated electrolytic capacitance of the electrolytic capacitor falls within a preset range or not. Each of transistors of the inverter circuit is determined as to its quality by determining whether an VCE - IC curve thereof falls in a preset range or not. The electrolytic capacitor, the transistors, and also diodes connected across the transistors can be determined as to whether they acceptable or not while they are being connected in the inverter circuit. <IMAGE>