Stator winding sections being manufactured in the Elektropromremont winding shop
  1. // ELEKTROPROMREMONT
  2. Spare parts manufacturing

Manufacturing of spare parts for electric machines

In-house production

Stator winding sections, rotor coils and mechanical parts

From a drawing or a sample

Reproduction of design documentation

AC / DC machines

Electric motors and generators

From one part to a full set

Manufactured for a specific repair

// WHAT WE MANUFACTURE

From a single part to a complete set of spares

Elektropromremont LLC manufactures spare parts and components for asynchronous and synchronous electric motors, DC machines, turbo- and hydrogenerators, traction motors and other industrial electric machines.

Parts are made to the Customer’s design documentation, to our own working drawings, or directly from a sample part. Where no documentation exists, we take measurements, carry out fault detection, establish the design parameters and reproduce the drawings required.

Components can be manufactured as part of a full overhaul of an electric machine, or supplied to the Customer as a standalone product.

Spare parts for rewinding the stator of a high-voltage electric motor// SET FOR A STATOR REWIND

// PRODUCT RANGE

The main groups of spare parts

Six manufacturing streams covering the winding, electrical and mechanical parts of an electric machine — from a single coil to a complete set for one specific repair.

Insulated stator winding sections for a high-voltage electric motor// 6 kV STATOR SECTIONS
Manufacturing a generator winding with conductor transposition// 6 kV STATOR SECTIONS
Finished stator coils in the winding shop// 6 kV STATOR SECTIONS
01

Stator windings and coil sections

We manufacture individual sections and complete stator winding sets to the electrical, geometric and insulation parameters of the specific machine. Forming, insulating, heat treatment and inspection of the finished sections are all done in-house.

stator winding sectionsstator coilsbar-type windingssections for high-voltage motorswindings with conductor transpositionwinding elements for generatorscomplete stator winding setsconnection busbars and winding leadsstator core lamination segments
Manufactured rotor shaft of an electric machine// ROTOR COMPONENTS
Rotor components of a synchronous electric machine// ROTOR COMPONENTS
Rotor coils being manufactured// ROTOR COMPONENTS
02

Rotor windings and components

We manufacture the winding and current-carrying elements of synchronous and asynchronous machine rotors to match the design and operating parameters of the equipment.

pole coils for synchronous machinesfield coilsrotor coilssquirrel-cage rotor barsshort-circuiting ringsslip ringscurrent leadspole system elementsrotor shaftsrotor core lamination segments
Commutator of a DC machine being manufactured// COMMUTATOR MANUFACTURING
In-house manufactured commutator segments// COMMUTATOR MANUFACTURING
Armature coil sections for a DC machine// COMMUTATOR MANUFACTURING
Armature of a traction motor// COMMUTATOR MANUFACTURING
03

Armatures and DC machine components

We manufacture and restore components of armatures, commutator and pole systems of DC machines — from individual elements to complete sets for a full rebuild of the machine.

armature coil sectionscomplete armature winding setscommutatorscommutator segments and componentsequalizer connectionsmain pole coilsinterpole coilscompensating windingsbrush holders and brush gear elementscontact and current-carrying elements
Manufacturing and restoration of commutators
  1. Calculation
  2. Part manufacturing
  3. Assembly
  4. Machining
  5. Inspection
In-house manufactured plain bearings and bearing assemblies// BEARING ASSEMBLIES
04

Plain bearings and bearing assemblies

We manufacture new bearing assemblies and restore existing ones. This includes re-lining plain bearings, machining the working surfaces, and manufacturing new segments and parts to drawings or from a sample.

plain bearingsbearing shellsbearing padsbearing pedestalsbearing housingssealing ringsoil-retaining ringslabyrinth sealsbearing coverslubrication system elements
Machining the shaft of an electric machine// MACHINING
Pressing a rotor core onto its shaft// MACHINING
05

Mechanical and housing parts

We manufacture and restore the mechanical and housing parts of electric machines, accounting for the fits, the geometry and the operating conditions of the particular assembly.

shafts and sleevesflangesend shieldscovers and housing partshubsfans and impellersfan cowls and coversfoundation and mounting elementscooling system partsfasteners and special structural elements
Fiberglass laminate insulating spacers made to drawing// INSULATING PARTS
Insulated winding rods packed for despatch// INSULATING PARTS
06

Insulation and electrical components

We manufacture the insulating and current-carrying elements required for the repair, modernization and restoration of electric machines.

slot wedgesslot insulationspacer and insulating elementsshims and insulating washersbanding and fastening elementscurrent-carrying busbarsflexible connectionswinding lead-outsinsulating parts to drawing

The list is not exhaustive. Whether a non-standard part can be manufactured is established after reviewing the drawing, the sample or the technical specification.

// NO DRAWING?

We reproduce the part from a sample

No factory drawing, or the equipment manufacturer no longer supplies the part you need? Our engineering and design department measures up the existing assembly, carries out fault detection and analysis, reproduces the working documentation, and defines the manufacturing process.

Insulating spacer blocks manufactured to a reproduced working drawing// THE PART AND ITS DRAWING
  1. STEP 01
    Sample
  2. STEP 02
    Measurements
  3. STEP 03
    Drawing
  4. STEP 04
    Manufacturing
  5. STEP 05
    Inspection
  6. STEP 06
    Finished part
// RESULT

The reproduced drawings stay with us, so making the same part again later needs neither the sample nor a second round of measurements.

// HOW WE MANUFACTURE

The manufacturing cycle of a stator section, drawn out

Every stage on the drawing is a real operation of the winding shop: calculation and layout, winding the bars, brazing the leads, insulating, and testing the finished set.

// MANUFACTURING STAGES

Seven steps from documentation to a finished component

The order of work is the same for a single part and for a full set: documentation and materials first, then manufacturing, and handover to the Customer only after inspection.

01Documentation
  1. 01
    Reviewing the documentation

    We study the drawings, the technical specification, or the sample part provided.

  2. 02
    Reproducing the drawings

    Where required, we measure up the part and develop the working documentation.

02Materials
  1. 03
    Selecting the materials

    We define the electrical, insulating and structural materials to be used.

03Manufacturing
  1. 04
    Manufacturing

    We carry out the winding, insulating, welding and machining operations.

  2. 05
    Heat treatment and impregnation

    Winding components go through the processes their technology calls for.

04Inspection
  1. 06
    Inspection

    We check the geometric, electrical and process parameters of the part.

  2. 07
    Testing and handover

    Finished components pass the testing their technology prescribes and are handed over to the Customer.

// QUALITY CONTROL

Quality is checked from incoming materials to the finished part

Each type of part gets its own set of checks — from measuring the geometry through to high-voltage testing of winding components.

STEP 01
Incoming inspection

Electrical, insulating and structural materials verified against their certificates.

STEP 02
Geometry and machining

Dimensional inspection of sizes and fits, plus the quality of the machined surfaces.

STEP 03
Electrical parameters

Electrical parameters, winding resistance and the condition of the insulation.

STEP 04
Testing and acceptance

High-voltage testing and a conformity check against the drawing and documentation.

// RESULT

The finished component is handed over to the Customer with an inspection report and confirmation that it conforms to the drawing.

Quality inspection of a manufactured electric machine shaft after machining// INSPECTING A MANUFACTURED SHAFT

Learn more about electric motor repair in knowledge base

Technical articles, diagnostic guides, and answers to common questions from Elektropromremont engineers.

Go to knowledge base

Need a spare part for an electric machine?

Send us a drawing, a photo, the equipment nameplate, or any details of the existing part. Our specialists will assess whether it can be restored or a new component made, and will propose a manufacturing solution.