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
| Oct 25, 2011
MKK participates in BSA Engineering Merit Badge day
MKK principal Craig Watts attended the event as a representative of the MEP (mechanical/electrical/plumbing) engineering industry to give scouts an idea of what’s involved in becoming a mechanical engineer, and an overview of a typical day in the life of an engineer.
| Oct 24, 2011
FMI releases Adjust, Adapt, Act Study
The paper explores several case studies, including Sun Country Builders, Huen, BakerTriangle, Consigli, Skender Construction and Flatiron, and distills the key factors that make these companies unique and successful.
| Oct 24, 2011
BBS Architects & Engineers receives 2011 Sustainable Design Award from AIA Long Island Chapter
AIA LI also recognized BBS with the 2011 ARCHI Award Commendation for the St. Charles Resurrection Cemetery St. Charles Resurrection Cemetery Welcoming and Information Center in Farmingdale, NY.
| Oct 24, 2011
Kolbe adds 3-D models of direct set windows to BIM library?
Beveled Direct Set SketchUp and Revit Models available.
| Oct 20, 2011
UNT receives nation’s first LEED Platinum designation for collegiate stadium
Apogee Stadium will achieve another first in December with the completion of three wind turbines that will feed the electrical grid that powers the stadium.
| Oct 20, 2011
Process leads to new design values for southern pine and other visually graded dimension lumber
A summary of the process used to develop new design values will clarify many of the questions received by the SFPA.
| Oct 20, 2011
Johnson Controls appoints Wojciechowski to lead real estate and facilities management business for Global Technology sector
Wojciechowski will be responsible for leading the continued growth of the technology vertical market, while building on the expertise the company has developed serving multinational technology companies.
| Oct 20, 2011
Stellar hires Navy veteran Taylor as vice president
Stellar’s federal experience includes military exchanges (large retail stores on military bases), lodging facilities for military personnel, fuel stations, youth activities centers and recreational centers.