Passive components and solutions for medium frequency applications
CEFEM, specialist in medium frequency inductive components
Since its founding, CEFEM has continuously evolved from low-frequency magnetic components (50/60 Hz) to specializing, for over 20 years, in medium-frequency inductive components from 1 to 300 kHz. This evolution delivers cost-effective solutions while supporting more energy-efficient and sustainable applications.
CAPABILITIES
1 kW to 1 MW
1 kHz to 300 kHz
Up to 3 000 A
Up to 2 000 V
Up to 36 kV Insulation
MF INDUCTIVE COMPONENTS
Our medium-frequency inductors enable higher power density and improved efficiency in demanding power electronics applications. We deliver custom designs tailored to your electrical, thermal, and mechanical constraints, with cooling options including natural air, forced air, or water.
By combining advanced magnetic materials with a design-to-cost approach, we help you reduce footprint while controlling total system cost.
Choosing medium frequency means:
The lightness
The compactness
The lightness
The compactness
Tailored design for ultimate performance component
At CEFEM, we consider several factors, such as the environment of the component, its constraints, in order to provide the solution that fits perfectly in your system while operating efficiently.
Depending on the requirements, whether high saturation resistance, frequency-stable inductance, low power dissipation, high power density or high short-term power, any type of winding can be combined with any type of core.
With our wide selection of materials and solution concepts, we always offer you the optimal solution for your application.
With a wide range of winding and core materials, we can develop and manufacture transformers and inductors tailored to your needs.
Magnetic materials
- Ferrite
- Iron Powder
- Amorphous
- Nanocrystallin (cut or uncut)
- Silicon Steel (0.1 to 0.5 mm)
Conductors
- Litz wire
- Copper or Aluminium foil
- Copper or Aluminium round wire
- Copper or Aluminium flat wire
COOLING
As the frequency increases and therefore the size of the components decreases, heat dissipation is a parameter that must be considered. Even without additional fans, our optimized designs allow for high power densities. The more compact solution is required, power density can be significantly increased by adding a fan or a water cooled system. Low weight and simple cooling are the advantages of air‑cooled winding products.
Natural air cooling
Forced air cooling
Liquid Cooled
Heat sink
LOSSES MANAGEMENT
Rising switching frequencies come with increased losses—CEFEM POWER is built to manage them. By combining precise modeling, simulation, and proven design know-how, we minimize core and copper losses to maximize overall efficiency.
Examples of medium frequency inductive components
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.
4 Legs Inductor
L= 4 x 120 µH
I= 360A
F= 20kHz
Weight= 70 kg
Low Losses Choke
L= 85 µH
I= 273 A
F= 7 kHz
Weight= 12 kg
3 Water Forced Inductors
L = 3 X 80 µH
I = 170 A
F = 40 kHz
Weight = 30 kg
HF Inductance & Transformer
P / L = 36 kVA / 5,4 µH
F = 40 kHz
Weight = 9 kg
Applications
CEFEM provides MF components to several markets with a focus in railway, green technologies, datacenters, drive technologies, industry and electrification.
CEFEM is your ideal partner: from advisory services to manufacturing process of medium frequency magnetic components, we are with you every step of the way.