Mitsubishi Electric Corp announced the overview of its ultra-high-speed elevator developed for the 632-meter Shanghai Tower under construction in Shanghai, China.
For the traction motor of the elevator, Mitsubishi Electric employed a parallel drive system that uses two three-phase winding coils for each motor and controls the two three-phases with two control panels. By using two compact control panels, the company enabled to design the layout of a machinery room more freely while increasing output power. The operation of the elevator is scheduled to begin in 2014.
To realize the world's fastest speed of 1,080 m per minute, Mitsubishi Electric used new technologies for higher safety, lifting height and comfort as well as for the motor for the winch. Specifically, to enhance safety, the company employed a two-tiered brake (the company's former product has a one-tiered brake) for emergency stop and used fine ceramic with a heat resistance of up to about 1,000°C for the brake shoe.
The buffer (shock absorber) at the bottom of the elevator shaft is comprised of three tiers (the former product has a one-tiered butter) and has a stroke of 7.3 meters, which is about 30% shorter than the stroke of the former product's buffer.
For the "sfleX-rope," a rope for the winch, Mitsubishi Electric employed a new structure so that it can hold a greater weight of a longer rope. The company improved the density of the rope by using a concentric-layered steel wire and filled the gap between the layers with plastic.
As a result, the company increased breaking load by 85% while increasing mass per unit length only by 18%. The new rope is less extensible. So, when people get in the elevator, it does not shake vertically much.
This time, Mitsubishi Electric newly developed a control cable that is 20% lighter than the one used for the former product.
For the comfort, the new elevator is equipped with the "active roller guide," which detects vibration and applies anti-phase vibration to it so that the vibration of the car is reduced. While two units of the active roller guide are installed in the bottom of the former product, Mitsubishi Electric added two more to the upper side of the new elevator because a different type of vibration is applied to the new product when it is moving at an ultra-high speed. As a result, vibration was reduced to about 1/3 that of the former product.
Furthermore, the new elevator is equipped with a streamlined aerodynamic car cover that reduces air resistance as well as an air pressure control device consisting of an air blower, a duct and a box for switching between air intake and emission. As a result, rapid changes in atmospheric pressure can be prevented, reducing passengers' feeling of fullness in the ear. BD+C
Related Stories
| Nov 15, 2010
Gilbane to acquire W.G. Mills, Inc.
Rhode Island-based Gilbane Building Company announced plans to acquire W.G. Mills, Inc., a construction management firm with operations based in Florida. The acquisition will dramatically strengthen Gilbane’s position in Florida’s growing market and complement its already established presence in the southeast.
| Nov 11, 2010
Saint-Gobain to make $80 million investment in SAGE Electrochromics
Saint-Gobain, one of the world’s largest glass and construction material manufacturers, is making a strategic equity investment in SAGE Electrochromics to make electronically tintable “dynamic glass” an affordable, mass-market product, ushering in a new era of energy-saving buildings.
| Nov 11, 2010
Saint-Gobain to make $80 million investment in SAGE Electrochromics
Saint-Gobain, one of the world’s largest glass and construction material manufacturers, is making a strategic equity investment in SAGE Electrochromics to make electronically tintable “dynamic glass” an affordable, mass-market product, ushering in a new era of energy-saving buildings.
| Nov 11, 2010
USGBC certifies more than 1 billion square feet of commercial space
This month, the total footprint of commercial projects certified under the U.S. Green Building Council’s LEED Green Building Rating System surpassed one billion square feet. Another six billion square feet of projects are registered and currently working toward LEED certification around the world. Since 2000, more than 36,000 commercial projects and 38,000 single-family homes have participated in LEED.
| Nov 10, 2010
$700 million plan to restore the National Mall
The National Mall—known as America’s front yard—is being targeted for a massive rehab and restoration that could cost as much as $700 million (it’s estimated that the Mall has $400 million in deferred maintenance alone). A few of the proposed projects: refurbishing the Grant Memorial, replacing the Capitol Reflecting Pool with a smaller pool or fountain, reconstructing the Constitution Gardens lake and constructing a multipurpose visitor center, and replacing the Sylvan Theater near the Washington Monument with a new multipurpose facility.
| Nov 9, 2010
Just how green is that college campus?
The College Sustainability Report Card 2011 evaluated colleges and universities in the U.S. and Canada with the 300 largest endowments—plus 22 others that asked to be included in the GreenReportCard.org study—on nine categories, including climate change, energy use, green building, and investment priorities. More than half (56%) earned a B or better, but 6% got a D. Can you guess which is the greenest of these: UC San Diego, Dickinson College, University of Calgary, and Dartmouth? Hint: The Red Devil has turned green.
| Nov 9, 2010
12 incredible objects being made with 3D printers today
BD+C has reported on how 3D printers are attracting the attention of AEC firms. Now you can see how other creative types are utilizing this fascinating printing technology. Among the printed items: King Tut’s remains, designer shoes, and the world’s smallest Rubik’s Cube.
| Nov 9, 2010
U.S. Army steps up requirements for greening building
Cool roofs, solar water heating, and advanced metering are among energy-efficiency elements that will have to be used in new permanent Army buildings in the U.S. and abroad starting in FY 2013. Designs for new construction and major renovations will incorporate sustainable design and development principles contained in ASHRAE 189.1.
