CEFEM, specialist in passive components for energy conversion

 

Since 1987, our French company has been supporting hundreds of customers around the world.

INDUCTORS
INDUCTORS
TRANSFORMERS
TRANSFORMERS
FILM CAPACITORS
FILM CAPACITORS
COMBINED COMPONENTS
COMBINED COMPONENTS

OUR MISSION


To provide a bespoke product with the highest possible volume, weight and power ratio.

After years of R&D and experience, we are able to offer magnetic components with the following characteristics :
1kW to 1MW
1kW to 1MW
2
2
Up to 3000 A
Up to 3000 A
Up to 2000 A
Up to 2000 A
Up to 1 T
Up to 1 T
FERROVIAIRE
FERROVIAIRE

Our solutions to your needs in railway industry

CEFEM’s passive components are used in demanding applications such as trains and underground transport.

They are found in auxiliary and traction converters and in some electrical cabinets. The units are mounted on the roof, under the cabinet and/or inside the converters.

For many years now, CEFEM has been paying special attention to technical development, quality assurance and the environment.

We work closely with our customers to provide optimised and bespoke solutions.

Thanks to years of R&D and experience in the railway industry, our components are lighter and more efficient, while meeting the most demanding specifications. Our experts test all the components in extreme conditions: severe climatic conditions, shock and vibration resistance, etc.
Lighter and more efficient
Lighter and more efficient
Lighter and more efficient
severe climatic conditions
severe climatic conditions
Resist severe climatic conditions
shock and vibration
shock and vibration
Resist shock and vibration
1kW (5)
1kW (5)
Transformers and reactors according to
1kW (5)
1kW (5)
Pollution degree
 
1kW (6)
1kW (6)
Fire protection according to
 
1kW (7)
1kW (7)
1kW (8)
1kW (8)

Our products &our technical research resources

Passive components represent a dynamic area for the development of our solutions.

New materials and technologies have enabled innovative approaches on a continuous basis over the past years.

CEFEM is now involved upstream in the development process for its customers. This significantly reduces the time to market when developing new components. Simulation software offers a significant advantage in this process.
TRANSFO 18kHz
TRANSFO 18kHz

4 Air-cooled MF transformers in one assembly

P = 230 kVA (2 x 100 + 2 x 15 kVA)
F = 18 kHz
Weight = 65 kg
Design sans titre (2)
Design sans titre (2)

2X2 Coupled Snubber inductors

L = 500 µH
I = 12 A
F = 22 kHz
Weight = 4.8 kg
Design sans titre (3)
Design sans titre (3)

Combined component

P = 2x30 kW
L = 500 µH
F= 20 kHz
Weight = 15 kg
line inductor
line inductor

Line Inductor

L = 9.5 mH
I = 484 Arms / 500 Apeak
U =1500 Vdc
F = 300 kHz
Weight = 800 kg
Input inductor
Input inductor

Input Inductor

L = 4 mH
I = 120 A
Weight = 70 kg
1kW (9)
1kW (9)

Battery Charger Transformer

P = 20 kW
F = 20 kHz