DETERMINATION OF MOTION LAW OF THE TWO STAGE PISTON COMPRESSOR DRIVEN BY THE ASYNCHRONOUS ELECTRIC DRIVE

Abstract

To determine motion law of the two-stage piston compressor as a single mass system driven by an asynchronous electric motor both at it’s activation under load and for the established motion mode the improved static engine characteristic is used. Nonlinear differential motion equation was solved by the Adams-Krylov numerical method. As a result it was found that the inertial moment on the compressor shaft at its activation is 2.5 times higher than at the established motion. The compressor acceleration time and the established motion average speed were determined. The compressor shaft motion law was compared with motion law in case of the permanent motor torque. Both motion laws are qualitatively similar but the schedule of the motion law in case of using an asynchronous electric motor drive is shifted toward a smaller compressor shaft rotation angle and the shaft has a slightly higher average angular speed.