Abstract—Regenerative motor-drive systems are nowadays widely applied in numerous industrial applications. This paper is centered on comparing the application of the two well-known and recently used types of drives for AC gearless elevators. This paper presents a comparative evaluation of the regenerative Permanent Magnet Synchronous Motor (PMSM) and AC Variable Voltage Variable Frequency (VVVF) drives. The study includes a detailed analysis of energy consumption, line running, accelerating and peak current and peak demand for each elevator control system. This paper shows the simulated results of output power, hoisting power, regenerative power, power savings which are compared for these drives along with the implementation of Automatic Rescue Device (ARD) for emergency operation using a battery with ultra capacitor combination which is charged by the regenerated power using converters.

Index Terms—Elevator, Electric drive, Regenerative drives PMSM, AC VVVF, ARD, Lithium ion battery ultra Capacitor, Inverter, Peak demand

Cite: Mopidevi Raghava and M Gopi Chand Naik, "COMPARATIVE STUDY OF RECENT ADVANCEMENTS IN REGENERATIVE DRIVES IN ELEVATOR SYSTEMS," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 3, No. 2, pp. 56-68, April 2014.