Turbomachinery arrangement

Abstract

Turbomachine arrangement (10) comprising an electric machine (19) having a shaft (20), at least one compressor section (12a, 12b) for increasing the pressure of a working medium, wherein each compressor section (12a, 12b) has a compressor shaft (13a, 13b), and / or at least one expander section for expanding the working medium, wherein each expander section has an expander shaft, wherein the electric machine (19), the at least one compressor section (12a, 12b) and / or the at least one expander section are arranged in a common, hermetically sealed housing (21), wherein the shafts, i.e., the shaft (20) of the electric machine (19), the respective compressor shaft (13a, 13b) and / or the respective expander shaft, are all completely enclosed within the hermetically sealed housing (21) and are coaxial with each other, and wherein the shafts in the hermetically sealed housing (21) are supported by active magnetic bearings (22) are stored,with at least one electrical current source (24a, 24b) arranged outside the hermetically sealed housing (21), which is configured to electrically energize the windings of the electrical machine (19) and / or the magnetic bearings (22) for heating an interior space (23) bounded by the hermetically sealed housing (21) when the electrical machine (19) is stationary, wherein the same has at least one first electrical current source (24a) for energizing the windings of the electrical machine (19), and wherein the same has at least one second electrical current source (24b) for energizing the magnetic bearings (22), wherein the at least one first electrical current source (24a) is configured to electrically energize the windings of the electrical machine (19) such that a first phase (U) of the electric current supplied by the respective first electrical current source (24a) has a first current amplitude,a second phase (V) of the electric current supplied by the respective first electric current source (24a),

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