Air compressor is used as reliable system for conversion of diesel or gasoline engine generated or electric motor produced power into energy which is stored as pressurized or compressed air. As part of its frequency conversion technology, this air compressor allows its operator to set operating pressure randomly. Set pressure is maintained constantly for production of compressed air. This system is also equipped with permanent magnet motor that has prolonged service life. This system has been checked as per its performance, operating cost and safety features.