Holtraf Theme Day "AC versus DC"on 19 April


Holtraf - Lecture on DC by Harry Stokman

TESLA vs. EDISON, or in technical jargon, alternating current (AC) vs. direct current (DC). Which form of electric current brings us further into the future? That is the central question on the AC versus DC theme day, which is organized by the association Holtraf (Dutch Transformers Manufacturers) on April 19, 2011 in Nieuwegein.

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Holtraf Theme Day "AC versus DC"

Article written on February 25, 2011


Holtraf Theme Day

"AC versus DC"

The preservation of raw materials in our world is unstoppable. Scarcity of raw materials will force us to put everything in the development of sustainable electric power generation, transportation and use of energy. What is the most efficient form of energy? Should we use centralized or decentralized power generation? Should we concentrate our focus on solar energy, bio-energy, or wind energy? And so on. These and many other questions will be discussed during the interactive theme afternoon on AC /DC.

Holtraf invites you to attend the theme afternoon on April 19, 2011 in Nieuwegein. The theme of this meeting, AC/DC, which holds very different opinions between the AC and the DC adversaries, will strongly engage the minds of producers to end users. In their presentations, our speakers will portray their opinions on how our future energy supplies will be given form. After the presentations subgroups will be formed to discuss the conclusions of the previous speakers. This AC/DC theme afternoon is a must for anyone involved with electric engineering!


The speakers are the following:

1) Mr. ing. Harry Stokman – Hellas Rectifiers BV and Direct Current BV

2) Mr. dr. ir. Sjef Cobben - Power Lab at TU - Eindhoven


Date: Tuesday, April 19, 2011

Time: 13.30 - 17.00 hrs (Reception from 13.00)

Location: Metaalunie

Einsteinbaan 1




13:00 Welcome with coffee

13:30 Presentation by Mr. Cobb and Mr. Stokman dealing with the question: Which form of electric current takes us further into the future?


14:50 Interactive discussions, divided in subgroups

15:45 Conclusions by Mr. Cobb and Mr. Stokman

16:30 Drinks


The contribution of this theme day is 35 Euros per person (excluding VAT). For students there is a reduced fee of 15 Euros per person (excluding VAT). Holtraf members can attend the afternoon for free.


Download article (in Dutch) on Hellas Rectifiers (PDF).

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