Which motor is used in escalator?
AC induction motors
Motors typically used are AC induction motors. All escalators have four gears; two drive gears on present on either side at the top and two return gears are there on either side at the bottom. The electric motor runs these four gears.
What is the best choice of electric motor for elevator?
For high-speed elevators, however, DC motors were used. This is because DC motors usually have higher starting torque than AC motors.
How do I choose an elevator motor?
Typical motor requirements are 15 to 75 horsepower. Inverters may be used on worm gear cable traction elevators operating at 100 to 150 FPM. These slower elevators typically require 7.5 to 10 horsepower motors. AC powered elevators that operate above 150 FPM should use a Baldor Vector Drive.
Why are DC motors used in escalator?
A DC motor can develop full torque within the operational speed range from zero to base speed (Figure 1). This allows the DC motor to be used on constant-torque loads such as conveyor belts, elevators, cranes, ski lifts, extruders and mixers.
Which motor is used in centrifugal pump?
The applications of different DC motors are: DC shunt motor: It is an almost constant speed motor. Hence it is used for driving constant speed line shafts, lathes, centrifugal pumps, small printing presses, paper making machines, etc.
What kind of motor is in an elevator?
Conventionally, there are, in general, three types of motors used in elevator systems: AC, DC and a hybrid between the two. The AC-2 motor is a primitive motor drive popular at least half a century ago for low-speed elevators. It is usually coupled with a worm gear to reduce speed and increase driving torque.
How many amps does an elevator use?
Many of the traction motor (cable) elevators are 60 amp at 480 or 100 amp feeds at 208/240. The 208/240 feeds usually use a step up transformer to get 480 to the drive. Depends on the manufacturer of the equipment.
What kind of motor does an escalator have?
The escalators mechanism with diagram. The core of an escalator is a pair of chains, looped around two pairs of gears. An electric motor turns the drive gears at the top, which rotate the chain loops. A typical escalator uses a 100 horsepower motor to rotate the gears.
Where are the drive wheels on an escalator?
Upper Sprocket / Lower Sprocket Drive wheels installed at the upper and lower parts of an escalator. The Upper Sprocket drives the Steps, while the Lower Sprocket turns the Steps.
How much oil does it take to run an escalator?
Each escalator contains two step chains on either side of the unit. These are basically similar in shape to a bicycle chain, but much larger, and attach the steps to the mechanical drive system which continuously pulls the steps. Historically these chains required constant lubrication, consuming up to 600 liters of oil in a 10-year period.
What are the safety devices on an escalator?
Safety Devices Types: there are so many safety devices included in the escalators as follows: 1- The Broken Drive Chain Device, or Step Chain Locking Device/Pawl Brake, is a ratchet- type device that prevents the escalator steps from sliding down from the weight of passengers if the drive chain breaks.