Abstract: An electric machine, in particular a generator for a wind turbine, is provided. The electric machine has a rotor and a stator, wherein the rotor is arranged rotatably relative to the stator about an axis of rotation. The rotor and the stator are arranged in such a way that a stator surface of the stator and a rotor surface of the rotor are spaced apart from one another. The rotor surface is circular about the axis of rotation. The stator is deformable in such a way that the stator surface has a non-circular surface profile about the axis of rotation without any magnetic interactions between the rotor and the stator being exerted within at least one segment of the stator, and that, in the event that magnetic interactions between the rotor and the stator are exerted, the stator is deformed in such a way that the stator surface is circular about the axis of rotation, with the result that a spacing between the stator surface and the rotor surface is constant.

Abstract: A refrigerant compressor (1) includes a cylinder block (4), in which a cylinder (14) is arranged, and a cylinder head (16), which covers the front side of the cylinder (14) and is connected to the cylinder block (4) by a plurality of threaded bolts (18, 19). It is endeavored to achieve a good performance with a small mass of the refrigerant compressor. For this purpose, it is ensured that at least two threaded bolts (18) extend through the cylinder block (4) and are screwed into a common mating thread element (23) at the end projecting from the cylinder block (4).

Abstract: Provided is a simplified design for spring retainers in a hermetically enclosed refrigerant compressor. A hermetically enclosed refrigerant compressor includes a hermetically tight enclosure, and an electrical motor unit and a compressor supported relative to the enclosure by springs. The electrical motor unit and compressor include a first spring retainer and the enclosure includes a second spring retainer. The first and second spring retainers hold springs such that the electrical motor and compressor are supported relative to the enclosure. The first spring retainer is integrated with the electrical motor unit and the compressor.

Abstract: The invention concerns a hermetically enclosed refrigerant compressor with a housing comprising an electrical feed-through, a connection plate (10) arranged on the outside of the housing in the area of the electrical feed-through, and a base plate (15) supporting the bottom of the housing in the gravity direction. It is endeavoured to obtain low manufacturing costs. For this purpose, the connection plate (10) and the base plate (15) are made together as one part (16).

Abstract: A control system (12) for controlling a refrigeration system (17) comprising two or more compressors (13a, 13b) (e.g. a twin compressor system). Each compressor (13a, 13b) is connected to an electronic unit (14a, 14b), and the electronic units (14a, 14b) are adapted to communicate appropriate signals to each other when the corresponding compressor (13a, 13b) starts or stops operation. The electronics units (14a, 14b) are further adapted to control the operation of the corresponding compressor (13a, 13b) in response to a signal received from the other electronic unit (14a, 14b). Thereby the control system (12) is adapted to control the operation of the two or more compressors (13a, 13b) in a mutually dependent manner. When one compressor (13a, 13b) of a multi-compressor refrigeration system (17) stops operating, the remaining compressor(s) (13a, 13b) will build up a pressure difference between the pressure side and the suction side.

Abstract: The invention concerns a method and a blank (30) for manufacturing a compressor block of a small-type refrigeration appliance, particularly for a hermetically enclosed refrigerant compressor arrangement, the blank comprising a handling section (34) and at least two working areas (43, 46). The blank (30) is clamped in a working arrangement at a handling section (34), the blank being worked during maintenance of the clamping. It is endeavoured to reduce the dimensions of a compressor block, though maintaining the opportunity of performing several working steps during one clamping process. For this purpose, it is provided that the handling section (34) is removed after the working.

Abstract: The invention concerns a hermetically enclosed refrigerant compressor arrangement (1) having a hermetically tight enclosure (2), a unit (7) comprising an electrical motor (8) with stator (14) and rotor (15) and a compressor (9) with cylinder head cover (48), and springs (10-12) fixed on the unit (7) via first spring retainers and on the enclosure via second spring retainers (59). It is endeavoured to simplify the design of the spring retaining means. For this purpose, at least one of the elements cylinder head cover (48) and end plate (23) of the stator (14) comprises at least one integrated first spring retainer (49, 50).

Abstract: The invention concerns a refrigerant compressor arrangement (1) with a compressor block (21) comprising a compressor unit (9) with a cylinder formed in the compressor block, and with a motor (8) having a stator (12) and a rotor (13), the rotor being unrotatably connected to a drive shaft (31) driving the compressor unit (9), the drive shaft (31) being supported in a bearing section (32) of the compressor block (21). It is endeavoured to make the refrigerant compressor arrangement with a smaller total height. For this purpose, the bearing section (32) penetrates an active area of the stator (12) and that the rotor (13) and the drive shaft (31) are connected to each other outside the active area on the side of the rotor (13) facing away from the compressor unit (9).