Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Magnetic Ceramics Films for Smaller Transformers

14.10.2010
Siemens is developing magnetic ceramic films so that the high-performance electronic circuits used in lighting systems and other such devices can be made smaller and much easier to manufacture.

This type of circuit adapts the voltage, current, and frequency to the electrical consumer, for instance, a lamp. In order to save space, as many components as possible — resistors and coils, for example — are incorporated into the individual layers of ceramic printed circuit boards, thus creating metallic surfaces or conductors.



Until now, however, it has been difficult to embed magnetic cores, like those used for transformers, into ceramics. The new film solves this problem, thus saving space in car headlights that use discharge lamps, for example. Such headlights are fitted with ballasts to create the high voltage needed for generating light. The new system would make it possible to incorporate the ballast directly into the lamp in the future.

Transformers change the current and voltage of alternating current. They consist of a closed magnetic core with two windings. If the component is incorporated into a printed circuit board, the windings are created in two of the board’s layers and the magnetic core is installed into a drilled opening. Doing this in ceramic printed circuit boards is a very complicated and expensive process because the magnets and ceramics expand differently when heated, making separate sintering or firing procedures necessary.

However, the researchers at Siemens have now developed a magnetic ceramic film which is laid on the transformer winding between the printed circuit board’s individual layers, where it takes over the function of the magnetic core. The ferrite film is only a few tenths of a millimeter thick and can be fired together with the ceramic circuit board in a single process step at less than 900 degrees Celsius. A transformer embedded in this manner and having an edge length of about 1.5 to two centimeters and a height of 1.5 millimeters transfers an output of 120 watts at a frequency of 2.5 megahertz.

The new, flat high-frequency transformer technology is designed for applications in which space is at a premium and ambient temperatures are high. In addition to being used for lighting and industrial applications, the new film can overcome the difficulty posed by simultaneous inductive transmission of energy and of sensor and control signals between otherwise incompatible printed circuit board technologies for high-performance and control electronics.

Among the beneficiaries of the new film are quick-charging systems for electric cars. Such systems have to handle currents of about 100 amperes while providing power to the communication units linking the charging station with the battery. The German Federal Ministry of Education and Research is helping to fund the film’s development.

Dr. Norbert Aschenbrenner | Siemens ResearchNews
Further information:
http://www.siemens.com/researchnews

More articles from Materials Sciences:

nachricht Magnesium magnificent for plasmonic applications
23.05.2018 | Rice University

nachricht New concept for structural colors
18.05.2018 | Technische Universität Hamburg-Harburg

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Research reveals how order first appears in liquid crystals

23.05.2018 | Life Sciences

Space-like gravity weakens biochemical signals in muscle formation

23.05.2018 | Life Sciences

NIST puts the optical microscope under the microscope to achieve atomic accuracy

23.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>