Title :
A Medium Voltage AC Drive with Parallel Current Source Inverters For High Power Applications
Author :
Xu, D. ; Zargari, N.R. ; Wu, B. ; Wiseman, J. ; Yuwen, B. ; Rizzo, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ryerson Univ., Toronto, Ont.
Abstract :
A power circuit topology suitable for large medium voltage AC drive applications is presented. The line side harmonics requirements are met by using an 18 pulse phase-controlled rectifier. The output horsepower of the drive is increased by connecting two inverters in parallel. The low switching frequency used in the inverters makes this approach especially attractive in very high power applications. A new control scheme is proposed to ensure proper current sharing between the two output inverters even when the power switching devices and the two bridges are severely asymmetric. The start up issues and the control response to transient conditions are analyzed and the boundaries of the controllability of the system are discussed. The proposed system is experimentally verified by a 208 V, 5 hp laboratory set up
Keywords :
AC motor drives; bridge circuits; controllability; harmonic analysis; invertors; phase control; switching convertors; 208 V; current sharing; high power applications; medium voltage AC drive; parallel current source inverters; phase-controlled rectifier; power circuit topology; power switching devices; system controllability; transient conditions; Bridge circuits; Circuit topology; Control systems; Controllability; Inverters; Joining processes; Medium voltage; Rectifiers; Switching frequency; Transient analysis;
Conference_Titel :
Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th
Conference_Location :
Recife
Print_ISBN :
0-7803-9033-4
DOI :
10.1109/PESC.2005.1581949
