Abstract: Provided is an electric generator including a stator including: a stator yoke a plurality of teeth, a plurality of slots extending radially from the stator yoke to respective radial slot ends, the plurality of slots being circumferentially interposed between the teeth of the stator, each slot including a bottom portion adjacent to the stator yoke and a top portion adjacent to the respective radial slot end. The stator further includes a plurality of coils housed in the plurality of slots, each slot housing at least one coil in the bottom portion and at least another coil in the top portion, each coil housed in the bottom portion of a first slot of the plurality of slots being connected to another respective coil housed in the top portion of a second slot of the plurality of slots.

Abstract: A stator assembly including a frame structure having a stator teeth being circumferentially distributed around a longitudinal axis, wherein in between respective two neighboring stator teeth there is formed one stator slot; a winding system having a plurality of electric windings, wherein respectively one electric winding is wound around at least one stator tooth and is partially accommodated within two stator slots and each electric winding comprises an end winding portion which axially protrudes from the frame structure; and an insulation arrangement having a plurality of electric insulation devices, each insulation device surrounding a part of one electric winding is provided. Each insulation device includes an inner insulation portion being accommodated within the respective stator slot and an outer insulation portion protruding from the frame structure and surrounding a part of the respective end winding portion.

Abstract: An electrical machine is provided including a stator with a stator core, a plurality of stator teeth protruding radially from the stator core, and a plurality of stator coils, wherein each stator coil is wound around at least one stator tooth of the stator and includes at least one coil head protruding in axial direction beyond the stator core, wherein the stator includes a stator extension structure with a plurality of magnetic flux-guiding extension segments each protruding axially from a stator tooth into an area surrounded by at least one of the coil heads.

Abstract: Provided is a covering element for covering a slot between two adjacent teeth of an electromagnetic machine, a stator for an electromagnetic machine and a method of forming a covering element. The covering element comprises a first sub-element and a second sub-element. The first sub-element and the second sub-element are arranged adjacent to each other in a first direction. Further, the second sub-element is made of a different material than the first sub-element.

Abstract: A method of manufacturing a segment for a stator of an electrical generator includes manufacturing a segment body circumferentially extending between at least a first end slot and a second end slot, providing the coil concentrated winding in the slots of the segment body, providing a first pressure plate a second pressure plate for respectively holding the coil in the first end slot and the second end slot, applying vacuum pressure impregnation to the coil concentrated winding in the slots of the segment body, and removing the first pressure plate and the second pressure plate for obtaining the segment.

Abstract: A stator assembly including a frame structure having a stator teeth being circumferentially distributed around a longitudinal axis, wherein in between respective two neighboring stator teeth there is formed one stator slot; a winding system having a plurality of electric windings, wherein respectively one electric winding is wound around at least one stator tooth and is partially accommodated within two stator slots and each electric winding comprises an end winding portion which axially protrudes from the frame structure; and an insulation arrangement having a plurality of electric insulation devices, each insulation device surrounding a part of one electric winding is provided. Each insulation device includes an inner insulation portion being accommodated within the respective stator slot and an outer insulation portion protruding from the frame structure and surrounding a part of the respective end winding portion.

Abstract: Provided is an electric generator including a stator including: a stator yoke a plurality of teeth, a plurality of slots extending radially from the stator yoke to respective radial slot ends, the plurality of slots being circumferentially interposed between the teeth of the stator, each slot including a bottom portion adjacent to the stator yoke and a top portion adjacent to the respective radial slot end. The stator further includes a plurality of coils housed in the plurality of slots, each slot housing at least one coil in the bottom portion and at least another coil in the top portion, each coil housed in the bottom portion of a first slot of the plurality of slots being connected to another respective coil housed in the top portion of a second slot of the plurality of slots.

Abstract: Provided is a covering element for covering a slot between two adjacent teeth of an electromagnetic machine, a stator for an electromagnetic machine and a method of forming a covering element. The covering element comprises a first sub-element and a second sub-element. The first sub-element and the second sub-element are arranged adjacent to each other in a first direction. Further, the second sub-element is made of a different material than the first sub-element.

Abstract: Provided is a covering element for covering a slot between two adjacent teeth of an electromagnetic machine, a stator for an electromagnetic machine and a method of forming a covering element. The covering element comprises a first sub-element and a second sub-element. The first sub-element and the second sub-element are arranged adjacent to each other in a first direction. Further, the second sub-element is made of a different material than the first sub-element.

Abstract: Provided is a stator assembly including: i) a first stator segment, ii) a second stator segment, wherein the first stator segment and the second stator segment being arranged along a circumferential direction of the stator assembly, and wherein the first stator segment and the second stator segment are located adjacent to each other and are separated by a gap. The stator assembly further including: iii) at least one first coil set of a first multi-phase coil system, and iv) at least one second coil set of a second multi-phase coil system, wherein each coil set includes at least one coil for each phase of the respective multi-phase coil system. Each stator segment includes a first busbar arrangement having first busbar elements, and a second busbar arrangement having second busbar elements, each busbar element being assigned to one phase.

Abstract: Provided is a stator assembly including: i) a first stator segment, ii) a second stator segment, wherein the first stator segment and the second stator segment being arranged along a circumferential direction of the stator assembly, and wherein the first stator segment and the second stator segment are located adjacent to each other and are separated by a gap. The stator assembly further including: iii) at least one first coil set of a first multi-phase coil system, and iv) at least one second coil set of a second multi-phase coil system, wherein each coil set includes at least one coil for each phase of the respective multi-phase coil system. Each stator segment includes a first busbar arrangement having first busbar elements, and a second busbar arrangement having second busbar elements, each busbar element being assigned to one phase.

Abstract: Provided is a generator, in particular for a wind turbine, including: a stator with a plurality of teeth and slots for coil windings; and a rotor which is rotatable arranged around or inside the stator and comprises at least one permanent magnet. At least one tooth comprises a protrusion having at least one inclined structure. An associated method of manufacturing such a stator for the generator is also provided.

Abstract: A stator assembly, a wind turbine and a method for manufacturing a stator assembly for an electrical machine with a concentrated winding stator design is provided. The method includes (a) providing a stator coil having a first coil axis and a first spatial design with, a first length along a first direction and a first width along a second direction; (b) exerting on the stator coil a tension force along the first direction and/or a compressive force along the second direction such that the first spatial design transforms into a second spatial design with a second length and a second width, wherein the second length is larger than the first length and the second width is smaller than the first width; and (c) placing the stator coil having the second spatial design around a single stator tooth of a stator yoke of the stator assembly.

Abstract: Provided is a covering element for covering a slot between two adjacent teeth of an electromagnetic machine, a stator for an electromagnetic machine and a method of forming a covering element. The covering element comprises a first sub-element and a second sub-element. The first sub-element and the second sub-element are arranged adjacent to each other in a first direction. Further, the second sub-element is made of a different material than the first sub-element.

Abstract: A method of manufacturing a segment for a stator of an electrical generator includes manufacturing a segment body circumferentially extending between at least a first end slot and a second end slot, providing the coil concentrated winding in the slots of the segment body, providing a first pressure plate a second pressure plate for respectively holding the coil in the first end slot and the second end slot, applying vacuum pressure impregnation to the coil concentrated winding in the slots of the segment body, and removing the first pressure plate and the second pressure plate for obtaining the segment.

Abstract: A bearing system for a wind turbine with a generator with an outer rotor, the bearing system including: an inner bearing ring, an outer bearing ring, a first electrical insulation element, a second electrical insulation element, a plurality of roller elements, a first metal element and a second metal element is provided. Therein, the roller elements are arranged at an inner volume between the inner bearing ring and outer bearing ring. The first electrical insulation element includes the first metal element. The second electrical insulation element includes the second metal element. The first electrical insulation element is arranged at least partially around the inner bearing ring in order to provide an electrical shielding to the inner of the bearing system and the second electrical insulation element is arranged at least partially around the outer bearing ring in order to provide an electrical shielding to the inner of the bearing system.

Abstract: A bearing system for a wind turbine with a generator with an outer rotor, the bearing system including: an inner bearing ring, an outer bearing ring, a first electrical insulation element, a second electrical insulation element, a plurality of roller elements, a first metal element and a second metal element is provided. Therein, the roller elements are arranged at an inner volume between the inner bearing ring and outer bearing ring. The first electrical insulation element includes the first metal element. The second electrical insulation element includes the second metal element. The first electrical insulation element is arranged at least partially around the inner bearing ring in order to provide an electrical shielding to the inner of the bearing system and the second electrical insulation element is arranged at least partially around the outer bearing ring in order to provide an electrical shielding to the inner of the bearing system.

Abstract: A method for monitoring a synchronous machine is described. The method includes injecting a narrowband sinusoidal signal at a first end of a field winding of the synchronous machine. The method further includes monitoring a voltage at a second end of the field winding with respect to ground. The method then identifies a resonant frequency based on the monitored voltage, and generates a winding health indicator based on the identified resonant frequency and an expected resonant frequency.