Power

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Author: search.filters.author.Metidji, Brahim (Supervisor)Subject: search.filters.subject.Induction Motors

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    Variable frequency drive (VFD)
    (2019) Ghazi, Abdenour Adel; Hamaili, Lyazid; Metidji, Brahim (Supervisor)
    A variable frequency drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor. Other names of a VFD are variable speed drive, adjustable speed drive, adjustable frequency drive, AC drive, Mi-crodrive, and inverter. One of the most recent variable frequency drive control methods is the Vector control also known as Field oriented control, which can be implemented through direct or indirect approaches. Indirect rotor field-oriented control (IRFOC) is a very popular technique in industries due to its simple designing and structure, in compar-ison to the direct method since it requires flux and torque estimators. In this proposed project IRFOC is simulated using MATLAB/Simulink and an implementation is carried out.
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    Nine-switch inverter for driving two induction motors independently
    (2019) Laloui, Mahdi; Rebbouh, Khaled; Metidji, Brahim (Supervisor)
    Industrial applications require large numbers of motors supply in the industrial world; therefor it is necessary to design system with low cost, reduced losses and higher efficiency. The nine-switch inverter is a recent reduced semiconductor topology which is developed to dual output converter. It can be used to drive two three-phase induction motors independently. As a substitute of two separate voltage source inverters, the nine-switch inverter has been already proposed in various industrial applications to reduce the number of semiconductor switches and energy losses. In this context, a scalar control method is developed to ensure the separate control of both induction motors. Simulations then implementation are carried- out to show that the developed independent control is effective and provides a simple configuration with high performance in terms of speed and torque responses.