Method and device for transmitting mechanical energy between a stirling machine and a generator or an electric motor

A method for transmitting mechanical energy between a transfer piston of a Stirling machine and a moveable member of a generator or of an electric motor, the transfer piston being mounted in a cylinder, according to which a working gas is periodically displaced between an expansion chamber (VE) and a compression chamber (Vc) constituting the working volume of said Stirling machine, with the aid of said transfer piston, said chambers being associated respectively with two working faces of said transfer piston, by making said gas pass through a hot, alternatively cold exchanger, linked to a heat source, a regenerator and a cooling exchanger linked to a heat sink and an elastic restoring force is exerted on this transfer piston, said piston constituting the only moveable item of said Stirling machine is disposed in said cylinder, one of said compression (Vc), expansion (VE) chambers is linked to a pneumatic resonator and a section ratio (aC/aE)≧0.35 is created between the two working faces of said piston so that the displacement of said piston along an axis X oriented toward the expansion volume (VE) produces a pressure component pX of said working gas opposed in phase to said displacement of said piston with a view to inducing a pressure wave in said pneumatic resonator able to transport energy of said working volume to this resonator so as to compensate for its losses and create in said working volume an amplified pressure variation out of phase with respect to said pressure component pX, in such a way as to transmit between this piston and said moveable member all of said mechanical energy produced.