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Wurth Electronics has announced a new standard for EFTB testing. Electrical fast transient burst (EFTB) is an electrical phenomenon, which plagues industrial environments. The EFTB waveform is a high-voltage, short-rise-time waveform different from typical surge or impulse requirements, which have longer rise times and duration. The specifics of the test can be found in IEC 61000-4-4. While this standard defines EFTB at the system level, Wurth Electronics has created a test method for the component level.
“All magnetic suppliers give information about attenuation, but most cannot answer the questions: Can a regular CMC attenuate an EFTB signal? Which CMCs are better at attenuating EFTB? Can you predict, or simulate, CMC attenuation of EFTB?,” explains Jared Quenzer, product development engineer at Wurth Electronics.
Quenzer is hoping this project will turn into regular testing for common mode chokes “This is why Wurth Electronics is the global leader in magnetics, to understand the “theory” while applying it in a practical way that can help our customers.”
Wurth Electronics and Schneider Electric have teamed up to research how common mode chokes attenuate this high-voltage, short-rise-time waveform.
Quenzer will be presenting at the Applied Power Electronics Conference (APEC) in March 2019, to explain this test method in more detail.
Dr. Ronald C. Lasky, Indium Corp.
It may be difficult to see any bright spots in the current and recent economic situation. We have all experienced the devastation of the pandemic, supply chain issues, and most recently, inflation. However, as a senior technologist for an international materials supplier (Indium Corporation) and a professor of engineering at an Ivy League research university (Dartmouth College), I offer these four silver linings for those of us in the electronics industry.
Chris Peters, USPAE
Events of the past two years have clearly demonstrated the value of strong trading relationships. When materials become constrained, as in the recent microchip shortage or any of the pandemic-driven supply chain snafus, the companies that have those materials have a choice to make. Which customers will be put at the front of the line, and which will be placed at the rear? Too often, company executives assume that since they are a large buyer, they automatically will be prioritized when supplies are constrained. Research has shown that this is not always the case, and that assumption can leave a company in a weakened position.
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