Patent ID: 8596987

Claim:
An electric compressor control device which controls an electric power supply from an inverter having a semiconductor switching element to an electric compressor having a built-in motor, comprising: a temperature sensor disposed on an exterior surface of the electric compressor; means for calculating a starting current value required for starting said compressor from a pressure measured at a discharge side of said compressor and upstream of a condenser, said starting current value having a correlation with said pressure; means for calculating a permitted current value of said semiconductor switching element only from a temperature of the inverter determined by the temperature sensor, said permitted current value having a correlation with said temperature; and a start permissibility determination means for determining whether to permit a start of said compressor by comparison between said calculated starting current value for said compressor and said permitted current value for said semiconductor switching element, wherein said inverter is incorporated integrally into said electric compressor, and wherein said electric compressor is a compressor which is incorporated into a refrigeration circuit of an air conditioning system for vehicles.