Retaining system with basic element and fixing elements to fix a bus bar on stator or stator segment of dynamoelectric machine

Patent metadata

Field	Value
Publication number	US-12456895-B2
Application number	US-202117917176-A
Country	US
Kind code	B2
Filing date	Feb 9, 2021
Priority date	Apr 6, 2020
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A retaining system for bus bars includes a basic element for fastening to an end face of a stator or stator segment of a dynamoelectric machine, and a predefined number of fixing elements configured to fix the bus bars to the basic element, wherein, when assembled, the retaining system has openings to suppress eddy currents when the bus bars are energized.

First claim

The invention claimed is:

1 . A retaining system for bus bars, said retaining system comprising:
a basic element for fastening to an end face of a stator or stator segment of a dynamoelectric machine, wherein the basic element includes a plurality of notches; a plurality of fixing elements configured to fix the bus bars to the basic element, wherein the plurality of fixing elements each Includes feet and a drilled hole; a plurality of screws, wherein each one of the plurality of screws fastens each one of the plurality of fixing elements to the basic element via the drilled hole with the feet of each one of the plurality of fixing elements enclosing each one of the plurality of notches of the basic element; and a plurality of openings, wherein at least one of the plurality of openings is between each of the plurality of fixing elements and at least another one of the plurality of openings is between one of the fixing elements and the basic element so that there are no closed metallic connections between the plurality of fixing elements and the basic element and eddy currents are suppressed when the bus bars are energized.

2 . A stator or stator segment of a dynamoelectric machine, comprising:
a laminated core having substantially axially extending grooves; a winding system received in the grooves and forming winding overhangs at end faces of the laminated core; a support system for arrangement of the laminated core, said support system including pressure plates in a region of the end faces and connection elements to fix the pressure plates; bus bars; and a retaining system for the bus bars, said retaining system including a basic element for fastening to an end face of the laminated core, wherein the basic element includes a plurality of notches; a plurality of fixing elements configured to fix the bus bars to the basic element, wherein the plurality of fixing elements each includes feet and a drilled hole; a plurality of screws, wherein each one of the plurality of screws fastens each one of the plurality of fixing elements to the basic element via the drilled hole with the feet of each one of the plurality of fixing elements enclosing each one of the plurality of notches of the basic element; and a plurality of openings, wherein at least one of the plurality of openings is between each of the plurality of fixing elements and at least another one of the plurality of openings is between one of the fixing elements and the basic element so that there are no closed metallic connections between the plurality of fixing elements and the basic element and eddy currents are suppressed when the bus bars are energized.

3 . The stator or stator segment of claim 2 , wherein the bus bars extend substantially radially beneath the winding overhangs.

4 . The stator or stator segment of claim 2 , wherein the basic element of the retaining system is fixed to the pressure plates by screws.

5 . The stator or stator segment of claim 2 , wherein the bus bars include insulation elements, at least in a region of the basic elements and the fixing elements.

6 . A generator of a wind power plant, said generator comprising a stator or stator segment, said stator or stator segment comprising a laminated core having substantially axially extending grooves, a winding system received in the grooves and forming winding overhangs at end faces of the laminated core, a support system for arrangement of the laminated core, said support system including pressure plates in a region of the end faces and connection elements to fix the pressure plates, bus bars, and a retaining system for the bus bars, said retaining system including a basic element for fastening to an end face of the laminated core, wherein the basic element includes a plurality of notches; a plurality of fixing elements configured to fix the bus bars to the basic element, wherein the plurality of fixing elements each includes feet and a drilled hole: a plurality of screws, wherein each one of the plurality of screws fastens each one of the plurality of fixing elements to the basic element via the drilled hole with the feet of each one of the plurality of fixing elements enclosing each one of the plurality of notches of the basic element; and a plurality of openings, wherein at least one of the plurality of openings is between each of the plurality of fixing elements and at least another one of the plurality of openings is between one of the fixing elements and the basic element so that there are no closed metallic connections between the plurality of fixing elements and the basic element and eddy currents are suppressed when the bus bars are energized.

7 . The generator of claim 6 , wherein the bus bars extend substantially radially beneath the winding overhangs.

8 . The generator of claim 6 , wherein the basic element of the retaining system is fixed to the pressure plate by screws.

9 . The generator of claim 6 , wherein the bus bars include insulation elements, at least in a region of the basic elements and the fixing elements.

10 . A wind power plant, comprising a generator as set forth in claim 6 .

Assignees

• Flender Gmbh

Inventors

• Brenner Robin
• Deutsch Artur
• Schönbauer Norbert
• Weger Michael
• Koeszegi Attila
• Lindmeier Andreas
• Ratzisberger Dominik
• Schober Franz Xaver Michael

Classifications

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K7/183

  wherein the turbine is a wind turbine (adaptation of a wind turbine to an electric generator F03D9/25) · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title

• H02K3/505 Primary

  for large machine windings, e.g. bar windings (H02K3/51 takes precedence) · CPC title