Patent ID: 6530756
Filing Date: 2003-03-11
Classification: F04B,H02K

Abstract:
An oscillation-type compressor comprising:a tightly closed casing having an inside space for storing coolant gas; a cylinder accommodated in said tightly closed casing; a motor including a stator and a mover; a piston connected to said mover of said motor; a movable element including said mover of said motor and said piston; a stationary element including said stator of said motor and said cylinder; an elastic element having a portion fixed to said movable element and another portion fixed to said stationary element; a piston position detecting sensor detecting the position of said piston; top dead center position calculating means for calculating a top dead center position of said piston based on a piston position signal obtained from said piston position detecting sensor; amplitude control means for controlling an amplitude of said mover in accordance with a difference between said top dead center position and a selected top dead center reference value; and top dead center reference value changing means for changing said top dead center reference value.