The ALTERNATOR

À partir de l’énergie mécanique d’une turbine, the alternator crée une énergie électrique. Il est composé d’un stator et d’un rotor qui tourne à une vitesse de synchronisme.

Our products range

Low speed alternators from 10 to 500 rpm et d’une puissance allant de 100kVA to 20MVA

Our alternators are direct-drive without multiplication, which eliminates many rotating mechanical parts..

 

The benefits are :

  • High yield
  • Less noise pollution
  • High availability, less risk of breakdowns

Our expertise :

  • Electrical and mechanical design and engineering
  • Adaptations aux contraintes de site
    • Axes : Vertical, Horizontal, Inclined
    • Underwater equipment, Bulb
    • Cooling : Natural/forced air, Liquid
  • De nombreuses options possibles : 
    • Parking brake
    • Frame
    • Armoire d’excitation
    • Vibration control
    • etc…
  • Manufactured in our workshops in Saint-Etienne (F-42100)
  • Magnetic circuits are cut and assembled in our workshops
  • Windings in our workshops
  • Rotation tests for each unit in our workshops
  • On site: Assembly, turbine alignment, commissioning and maintenance..

Two solutions to suit your needs

Permanent magnets generator

  • Coupling cabinet (Load bank, Inverter or Direct)
  • Reduced sizes
  • From 100 kVA to 4 MVA
  • From 10 to 500 rpm

Wound poles generator

  • Possibility of static or brushless excitation with rotating diodes.
  • Cos φ regulation
  • From 100 kVA to 20 MVA 
  • From 75 to 500 rpm

10 steps to a successful project

Customer's needs
1.
Price offer
  • Product presentation
  • Review of requirements
2.
Specifications & Definitive offer
  • Constraint study
  • Advices
3.
Order agreement
  • Register your order & send a confirmation
  • Deadline validation
4.
Electrical dimensioning and mechanical design
  • Machine optimization to increase efficiency
  • General and interface drawings
5.
Validation of general drawing and electrical specifications
6.
Details drawings
7.
Manufacturing & Testing
  • Manufactured in our workshops
  • Magnetic circuits cutting
  • Assembly
  • Testing on test bed
8.
Transport & Customer reception

We organize the transport(s) and plan the delivery with the customer. We offer handling solutions adapted to your site constraints.

9.
On-site installation & Commissioning

Our technicians install and start up the generator.

10.
Equipment maintenance & monitoring

Our team provides maintenance and performance monitoring for all equipment sold. A full report is issued at the end of each intervention, detailing all work carried out, measurements taken and preventive recommendations.

Bernard Bonnefond it's also renovation!

Expertise and refurbished of your generator

Bernard Bonnefond and other manufacturer

  • Electromagnetic calculation to optimize electrical characteristics
  • Finite element simulation with Flux2D
  •  Repair or replacement of magnetic circuits and winding/poles.
  •  Check, machining or replace mechanical parts
  •  Replacement or redesign bearing system
  •  Modification du système d’excitation.
PXL_20230207_100752260 PXL_20230207_100635127
AAVANT Après

Technical upgrading of equipment

  • Added sensors for greater control.
  • Cooling system modification
  • Adding brake
  • Modernisation du design extérieur et amélioration de l’ergonomie.

Few examples of our works

  • Complete electrical testing before and after maintenance.
  • Reprise des connexions à partir des bobines jusqu’à la boite à bornes.
  • Rotor, Stator and exciter cleaning 
  • Drying. 
  • anti-flash varnish
  • Bearing change
  • Suppression du ventilateur à inertie monté sur l’arbre (voir photos, pièce au dessus du rotor).
  • Addition of two fans with inverters controlled by probes in the stator. Smoke test
  • Disassembly & Transport
  • Sandblasting
  • Dimensional and magnetic inspection
  • Welding rework
  • Electromagnetic calculation and efficiency optimization
  • Complete overhaul of stator magnetic circuit and winding
  • Cleaning & re-insulating rotor poles
  • Modification du système d’excitation
  • Cooling system reconditioning
  • Re-assembly and commissioning
  • Stator and rotor disassembly
  • Isolation measurement
  • Checking and reconditioning of stator winding wedge
  • Complete cleaning of stator and rotor
  • Etuvage sur site de l’ensemble
  • Application d’un vernis et d’un anti flash
  • Re-assembly and commissioning

We're interested in all your technical requirements

N’hésitez pas à nous solliciter, nous saurons relever vos défis !

Contact us !

Désolé, nos réalisations ne sont actuellement pas disponibles pour ce produit.