A reciprocating-type piston compressor that can operate at very low speed (<300 rpm) with the ability to pump liquids. It can be configured with one or more double-acting cylinders. A variable speed drive can be used to adjust the operating speed of the compressor to control system torque requirements throughout the compression cycle.
F04B 17/03 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
F04B 19/06 - Pumps for delivery of both liquid and elastic fluids at the same time
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
H02P 27/04 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
