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Elevator Traction machine

Elevator Traction machines are the most common type of elevators. Elevator cars are pulled up by means of rolling steel ropes over a deeply grooved pulley, commonly called a sheave in the industry. The weight of the car is balanced by a counterweight. Sometimes two elevators are built so that their cars always move synchronously in opposite directions, and are each other's counterweight.

Geared traction elevators

Geared traction machines are driven by AC or DC electric motors. As the name implies, the electric motor in this design drives a worm-and-gear-type reduction unit, which turns the hoisting sheave. While the lift rates are slower than in a typical gearless elevator, the gear reduction offers the advantage of requiring a less powerful motor to turn the sheave. These elevators typically operate at speeds from 38 to 152 meters (125-500 ft) per minute and carry loads of up to 13,600 kilograms (30,000 lb). An electrically controlled brake between the motor and the reduction unit stops the elevator, holding the car at the desired floor level.

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Contemporary cheaper installations, such as those in residential buildings and low-traffic commercial applications generally used a single or two speed AC hoist machine. The widespread availability of cheap solid state AC drives has allowed infinitely variable speed AC motors to be used universally, bringing with it the advantages of the older motor-generator based systems, without the penalties in terms of efficiency and complexity. The older MG-based installations are gradually being replaced in older buildings due to their poor energy efficiency.

Gearless traction elevators

Gearless traction electric elevator first invented by Otis in 1903, first installed in Beaver Building in New York City, and the Majestic Building in Chicago. This type of drive system could be employed in buildings of any height and operated at much higher speeds than steam-powered elevators. This design has proven so durable that even now, when a building is modernized—while the elevator control system is replaced with the most up-to-date electronics—it is rarely necessary to replace a well-maintained gearless machine. These elevators typically operate at speeds greater than 500 feet per minute.

   OTHER NEWS
» Hisa received Excellent Brand 2015 [23 / 11 / 2015]
» Designed & installed elevator for TONGWEI VIETNAM GROUP [22 / 04 / 2015]
» [22 / 04 / 2015]
» [22 / 04 / 2015]
» [22 / 04 / 2015]
» Designed and installed elevators for DR.NUPAK Group [22 / 04 / 2015]
» Stiring board and office staffs in the commemorative photo [22 / 04 / 2015]
» INTERNATIONAL STANDARD CERTIFICATION BODY ISSUED ISO 9001-2008 TO HISA ELEVATOR COMPANY [18 / 03 / 2014]
» Elevator information [23 / 09 / 2013]
» “The staff is the driving force behind a successful company” [23 / 09 / 2013]
» How important are your employees for the success of your company? [20 / 09 / 2013]
» Car elevator system of Volkswagen [08 / 07 / 2013]
» Elevators in skyscrapers tower was broken unexpectly [21 / 06 / 2013]
» Hitachi build urban rail for HCM [18 / 06 / 2013]
» Research on elevator designs in Vietnam [18 / 06 / 2013]
» Solar powered elevator [14 / 06 / 2013]
» Outdoor escalator - 800m long [14 / 06 / 2013]
» Vacuum Elevators [14 / 06 / 2013]
» Do not use elevators from China for Tran Thi Ly Bridge [14 / 06 / 2013]
» Need to know how to use elevator [14 / 06 / 2013]
» The unique waterway elevators in the world [14 / 06 / 2013]
» Elevator industry is in the group have to tighten on safety [14 / 06 / 2013]
» Using Kone Ultrarope technology for elevators in the future [14 / 06 / 2013]
» Hisa build new factory at Cu Chi to increase capacity up to 500 elevators per month. [07 / 06 / 2013]
» ThyssenKrupp has introduced the new generation elevator collection [29 / 05 / 2013]
 
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HISA ELECTRICAL ELEVATOR COMPANY 
56 Tan Thoi Nhat 14 - Tan Thoi Nhat ward - District 12 - HCM City 
Phone : (+84-8) 5435 7228 - 6255 8165 - 6255 8166 - Fax : (+84-8) 6255 8164
Email: sales@hisaelevator.com