Method for producing a dynamoelectric rotary machine, and dynamoelectric rotary machine

Patent metadata

Field	Value
Publication number	US-10424985-B2
Application number	US-201414904272-A
Country	US
Kind code	B2
Filing date	Jul 8, 2014
Priority date	Jul 12, 2013
Publication date	Sep 24, 2019
Grant date	Sep 24, 2019

Abstract

The invention relates to a method for producing a rotor and/or a stator of a dynamoelectric rotary machine by means of the following steps: —producing pre-formed coils from an integral electrically conductive material or pre-insulated or coated electrically conductive wires, —fixing spacers to the pre-formed coil at predefinable intervals, —inserting the pre-formed coil, which is provided with spacers, into slots in a laminated core of a stator or rotor, —making contact with the individual pre-formed coils to form groups of coils and forming a winding system of a rotor and/or stator in accordance with a predefined circuit plan, —insulating the pre-formed coils or the winding system in the slots by complete encapsulation, in particular by complete vacuum encapsulation.

First claim

The invention claimed is:

1. A dynamoelectric rotary machine, comprising:
a stator and a rotor spaced from the stator to define an air gap there between, at least one of the stator and the rotor including a laminated core made from axially layered laminations and having slots configured to extend to the air gap;
pre-formed coils received in the slots, each said pre-formed coil being embedded in thermosetting encapsulation in the slots and having integral electrically conductive material or pre-insulated or coated electrical conductive wires;
spacers arranged in axially spaced-apart relationship to hold the pre-formed coils in the slots, each of said spacers having triangular teeth resting against a confronting flat side wall of the slot such as to define cavities between neighboring teeth and to secure the spacer in place b frictional force; and
insulating material received in the cavities between the teeth of the spacer and further strengthening a securement of the spacer in the slot.

2. The dynamoelectric rotary machine of claim 1 , wherein the spacers are made of thermosetting or thermoplastic material with inorganic or organic fillers.

3. The dynamoelectric rotary machine of claim 1 , wherein the spacers have a surface finish which is roughened, porous or coated or is soluble by way of encapsulation medium.

4. The dynamoelectric rotary machine of claim 1 , wherein the cavities are of triangular configuration.

5. A method for producing a rotor or stator of a dynamoelectric rotary machine as set forth in claim 1 , said method, comprising:
fixing spacers to the pre-formed coil of the dynamoelectric rotary machine at predefinable axial intervals;
inserting the pre-formed coils with the spacers into slots in a laminated core of the dynamoelectric rotary machine such that triangular teeth of the spacers rest against confronting flat side walls of the slots and secure the spacer in place by frictional force;
contacting the individual pre-formed coils such as to form groups of coils and forming a winding system in accordance with a predefined circuit plan; and
introducing insulating material into cavities between the teeth of the spacers to thereby insulate the winding system in the slots by encapsulation and further strengthening a securement of the spacer in the slot.

6. The method of claim 5 , wherein the winding system is insulated in the slots by vacuum encapsulation.

Assignees

• Siemens Ag

Inventors

• Grübel André
• Klaussner Bernhard
• Schirm Dieter
• Übler Matthias

Classifications

• H02K3/345

  between conductor and core, e.g. slot insulation · CPC title

• H02K15/12

  Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines · CPC title

• H02K3/38

  around winding heads, equalising connectors, or connections thereto · CPC title

• H02K15/02

  of stator or rotor bodies · CPC title

• H02K1/12

  Stationary parts of the magnetic circuit · CPC title