Manufacturer of generators, electric motors, frequency converters and permanent magnet machines up to 13 MW
Marelli Motori Srl
Arzignano (IT) · Subsidiaries in Germany, Malaysia, South Africa, USA, United KingdomNew on Amplifa
About Marelli Motori
Marelli Motori Srl is an Italian manufacturer founded in 1891, producing generators, electric motors, frequency converters, AVR systems and permanent magnet machines. At its headquarters in Arzignano (Veneto), industrial machines are manufactured in vertically integrated production up to 13 MW, 15 kV and 50 t; the manufacturing combines mass production, research and development, and in-house service processes. The products are used, among other things, in marine applications, oil and gas, power plant and CHP systems, hydropower, wind turbine applications and industry, and increasingly for data centers. The company employs around 500 people (2023 figure: approx. 630) and supplies more than 120 countries through sales and service networks on four continents. Subsidiaries exist in Germany, Malaysia, South Africa, the USA and the United Kingdom. Since May 2019, Marelli Motori has been part of the British Langley Holdings plc (Power Solutions Division).
- Site
- Arzignano (VI), Italy
- Processes
- Manufacturing of generators/alternators, Manufacturing of electric motors (up to 13 MW, 15 kV), Overhaul & repair of low, medium and high voltage machines (brand-independent), VPI impregnation (VPI plants), Rotor balancing (precision balancing), Testing of motors and generators (vertical & horizontal, IEC/IEEE, ATEX, UL), Manufacturing of permanent magnet machines, Commissioning
- Materials
- Permanent magnets (PM technology), Permanent Magnet Technology, Copper (Windings)
- Certificates
- GWO certification (service engineers wind sector), Testing according to IEC / IEEE, ATEX / UL, Marine classifications, GWO-certified service engineers (wind)
- Founded
- 1891
- Employees
- approx. 500 (website
- Industries
- Marine, Oil & Gas, Power Generation, Combined Heat and Power (CHP), Hydropower, Wind
- 01
Design & Engineering
- 02
Winding Manufacturing
- 03
VPI Impregnation
- 04
Assembly of Generators/Motors
- 05
Rotor Balancing
- 06
Test Bench Testing (Test Room)
- 07
Commissioning & Service
Products & Technologies
Permanent Magnet Technology
Permanent magnet machines with high electromagnetic efficiency, compact design and wider speed range; strategic focus since 2021 (Going Green).
Copper (Windings)
Winding material for low, medium and high voltage generators and motors.
Manufacturing Site
Arzignano
ITHeadquarters with manufacturing plant, R&D and test room
- Part weight / size
- Machines up to 50 t
- Lot size
- Single-unit and mass production of machines
- Materials
- Generators, motors, permanent magnet machines
- Vertical & horizontal test benches (2,800 m², up to 4 MW / 10 MVA)
- Computerized machining centers
- VPI plants (Vacuum Pressure Impregnation)
- 3D measuring systems
- Rotor balancing facility
- Digital and infrared diagnostic tools
Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacturing of generators/alternatorsAssembly | – | – | 50 tons | – | Copper (derivable, windings) |
| Manufacturing of electric motors (up to 13 MW, 15 kV)Assembly | – | – | 50 tons | – | – |
| Overhaul & repair of low, medium and high voltage machines (brand-independent)Assembly | – | – | – | – | – |
| VPI impregnation (VPI plants)Surface | – | – | – | – | – |
| Rotor balancing (precision balancing)Testing | – | – | – | – | – |
| Testing of motors and generators (vertical & horizontal, IEC/IEEE, ATEX, UL)Testing | – | – | – | – | – |
| Manufacturing of permanent magnet machinesAssembly | – | – | – | – | Permanent magnets |
| CommissioningTesting | – | – | – | – | – |
| Predictive Diagnostics / vibration analysisTesting | – | – | – | – | – |
| Wind Generator Repair & ServicesAssembly | – | – | – | – | – |
4 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Test room/test benches for motors and generators (vertical & horizontal) | – | – | Test area 2,800 m²; LV 0-690V; MV/HV 1-15kV; Frequency 0-200 Hz (asynchronous) / 0-400 Hz | – | Arzignano |
| Computerized machining centers | – | – | – | – | Arzignano |
| VPI plants (Vacuum Pressure Impregnation) | – | – | – | – | Arzignano |
| 3D measuring systems | – | – | – | – | Arzignano |
Additional services
Reference customers
Quality & Testing
Testing is carried out in the in-house test room in Arzignano in the original mounting position (vertical and horizontal) in accordance with IEC, IEEE, customer specifications, marine classifications, ATEX and UL; in the service area, 3D measuring systems as well as digital and infrared diagnostics are used.
| Evidence | Arzignano |
|---|---|
| Testing according to IEC / IEEE | |
| ATEX / UL | |
| Marine classifications | |
| GWO-certified service engineers (wind) |
History
- 1891
Founded by Ercole Marelli in Milan (electric motors and equipment); in 1901, Antonio Pellizzari's workshop was founded in Vicenza.
- 1931
Pellizzari & Figli develops rapidly; several patents are registered.
- 1950
Pellizzari & Figli operates seven production facilities in Vicenza and two in South America; in 1953 the millionth motor is manufactured in Arzignano.
- 1970
Construction of the new plant in Arzignano, the basis of today's facility.
- 1991
Marelli Motori confirms its position on the world market.
- 2019
Acquisition by Langley Holdings plc (24 May 2019).
- 2021
Strategic initiative "Going Green" with a focus on permanent magnet technology.
- 2024
Generators for Bergen Engines power plant for the energy supply of the Dnipro region, Ukraine (UNDP-funded).