Cupertino F., Salvatore N., Cascella G.L.
 

This paper appears in: Power Electronics and Applications, 2005 European Conference on
On page(s): 10 pp. - P.10
Location: Dresden
Print ISBN: 90-75815-09-3
INSPEC Accession Number: 9046242
Digital Object Identifier: 10.1109/EPE.2005.219708
Date of Current Version: 07 August 2006

ABSTRACT

This paper proposes to use variable-saturation regulators for induction motor drives operating in field-weakening region, and presents a comparative dynamic-performance analysis between the traditional indirect rotor field oriented (IRFO) control scheme and a new stator flux oriented - sliding mode (SFO-SM) control scheme. The traditional IRFO control scheme has the d-axis current component, torque, rotor flux, and speed loops with four PI-type controllers. The SFO-SM control system is a direct torque control - space vector modulation (DTC-SVM) scheme with closed loops of torque and stator flux without current PI-type controllers. Both control schemes use regulators with variable-saturation in such a way that maximum dc-bus voltage utilization is reached and overcurrent problems are prevented. The experiments are carried out using dSpace digital controllers and comparative results show that the SFO-SM controlled induction motor (IM) drive and IRFO one are characterized by similar dynamic responses in spite of structural simplicity of the SFO-SM control scheme