Variable-frequency air compressor detection system

The invention discloses a variable-frequency air compressor detection system. The detection system comprises a power analyzer, a sensing acquisition system and an industrial personal computer; the industrial personal computer is used for acquiring signals output by the sensing acquisition system and the power analyzer and controlling the sensing acquisition system and the power analyzer; measurement points of the power analyzer are located on an A-phase line and a B-phase line in a three-phase input line of a variable-frequency air compressor, a line between an AC/DC converter and an inverterin the variable-frequency air compressor, and an A-phase line, a B-phase line and a C-phase line between the inverter and a motor in the variable-frequency air compressor respectively; a motor signalinput end of the power analyzer is connected with a motor output end of the variable-frequency air compressor; the power analyzer is used for determining electric quantity parameters of the variable-frequency air compressor ac