We Continue the Work of Those
Who Were the First.

  • Electrical Engineering
  • Light & Lighting
  • Power Engineering
  • Transportation
  • Automation
  • Communication
  • Smart Buildings
  • Industry
  • Innovation

Current issue

ELEKTRO 11/2017 was released on November 6th 2017. Its digital version will be available on November 27th 2017.

Topic: Electrical distribution switchboards and switchboard technology; Rotating electrical machines

Main Article
Analysis of the CFD settings for simulating the temperature field of sinusoidal filter
On-line optimisation of current commutation angles in phases of BLDC motor

SVĚTLO (Light) 5/2017 was released on September 18th 2017. Its digital version will be available on September 18th 2017.

Luminaires and luminous apparatuses
MAYBE STYLE introducing LED design luminaires of German producer Lightnet
TREVOS – new luminaires for industry and offices
How many types of LED panels produces MODUS?
Intelligent LED luminaire RENO PROFI

Interiors lighting
The light in indoor flat interior – questions and answers

How to Build a Space Elevator From Scratch

31.08.2015 | Spectrum IEEE | spectrum.ieee.org

The idea of a space elevator has been around for over a century. The basic concept is simple: a tether descends from a spacecraft in geostationary orbit to a floating platform at the equator, probably in the eastern Pacific Ocean.

Because of a counterweight that would extend far into space, the space elevator’s tether would be gravitationally stable, allowing electric elevator cars to make the week-long climb to orbit powered by solar panels and ground-based lasers.

Are we on the verge of building the space elevator?

Researchers from the International Space Elevator Consortium (ISEC) believe, that such a system could eventually slash the cost of raising a kilogram of payload into geosynchronous orbit from roughly US $25,000 to $300 or less. The key word, of course, is “eventually”. Technical challenges are legion, including building the aircraft carrier-size floating platform, designing safe, speedy climbers, and avoiding space debris and other satellites. But the truly fundamental obstacle is the lack of a material strong and resilient enough to form the elevator’s tether.

In current designs, the space elevator’s tether is not a thick round cable as originally proposed, but a paper-thin ribbon, a meter wide and 100,000 kilometers long. Even with such a slimmed-down approach, the strain of simply keeping its own mass aloft would instantly shred any tether made from steel, Kevlar, carbon composites, or even the best carbon nanotubes we can currently make.

Read more at Spectrum IEEE

Image Credit: ISEC

-jk-