Energy efficient technologies for railway escalators

This paper is to present the reviewing results on the design and implementation of energy efficient technologies and their future development and applications of the vertical transportation system -escalator in the railway industry. Two alternative methods [1] are introduced to reduce energy consumption of escalator in the railway industry. The first one called "VSD" method, by installation of a variable frequency drive to link up with the scheduling control scheme. The second is to design a special "VVC" controller to reduce the energy by controlling the motor voltage and improving motor power factor when only fewer people using the escalator but keeping the speed constant.