Authors: Walid Emar; Omar A. Saraereh
Addresses: Electrical Department, Faculty of Engineering, Isra University, Amman, 11622, Jordan ' Electrical Department, Faculty of Engineering, The Hashemite University, Zarqa, 13115, Jordan
Abstract: This paper deals with the problem of modelling, control and analysis of a doubly-powered induction machine (DPIM) using a three-level three-phase voltage source inverter known simply as diode clamped inverter (DCI) with a three-phase diode rectifier and a DC link in between. A mathematical model of DPIM and the associated DCI circuit is developed. The stator circuit of the DPIM is supplied directly from an ac system network while its rotor side is supplied via a variable frequency DCI. A multi-loop nonlinear field controller is developed to meet an accurate motor speed, regulation of the mechanical load torque and the overall system power. The results obtained from the simulation in the environment of Simplorer 7 show that the proposed DCI inverter offers great optimisation, little overshoot, and reduced voltage ripples. Consequently, the dynamic behaviour of the motor and the energy efficiency of the overall system are progressively improved and a complete suppress of the influence of the variation in the motor load on the speed of the motor is achieved.
Keywords: three-level three-phase inverter; space vector control; speed and voltage control; doubly-powered induction machine; DPIM; voltage source converter; VSC; Simplorer 7.
International Journal of Power Electronics, 2019 Vol.10 No.1/2, pp.173 - 185
Received: 09 Oct 2017
Accepted: 13 Apr 2018
Published online: 07 Nov 2018 *