Implementation and performance analysis of an elevator electric motor drive system

The focus of this paper is the implementation and performance analysis of an elevator three-phase induction motor drive and its comparison to the traditional dual stator winding line-supplied elevator motors. To carry-on this study, a scaled prototype elevator is designed and manufactured. The elevator system motion controller is implemented via a PLC. The elevator ASD (Adjustable Speed Drive) consists of a variable frequency converter driving the three-phase induction motor coupled to a gearbox. The implemented elevator motion control system is discussed in this paper. The per-phase equivalent circuit motor parameters and loss components are measured in case of variable frequency supply and compared to the 50-Hz sinsuoidal line supply case. The steady-state as well as dynamic performance of the elevator electric motor drive system is also evaluated.