Search for dissertations about: "induction motor load"

Showing result 1 - 5 of 16 swedish dissertations containing the words induction motor load.

  2. 1. Voltage collapse in power systems : analysis of component related phenomena using a power system model

    Author : Magnus Gustafsson; Niclas Krantz; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; power system model; armature current limiter; reactive power; voltage collapse; OLTC; dynamic load; active power; field current limiter; voltage stability; load modelling; on-load tap changer; voltage instability; induction motor load;

    Abstract : .... READ MORE

  4. 2. Thermal Modelling of Small Cage Induction Motors

    Author : Gunnar Kylander; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermal network; thermal model; losses; TEFC; induction motor;

    Abstract : The loadability of electric machines is above all determined by temperature limits. In this work, thermal network models, suitable for totally enclosed fan cooled (TEFC) induction motors, are used to predict the machine temperatures. READ MORE

  5. 3. Investigation of Issues Related to Electrical Efficiency Improvements of Pump and Fan Drives in Buildings

    Author : Johan Åström; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent magnet motor; efficiency measurement; frequency converter; HVAC load profiles and saving potential; loss model; Induction motor;

    Abstract : This thesis deals with issues related to efficiency of building related pump and fan drive systems. Different motor technologies are analyzed and a more detailed study oninverter fed Induction Machines (IM) is presented. READ MORE

  6. 4. On Control of Back-to-Back Converters and Sensorless Induction Machine Drives

    Author : Rolf Ottersten; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active filtering; flux estimation; sensorless control; induction motor; back-to-back converter; pulsewidth-modulated rectifier; virtual flux; vector current control;

    Abstract : This thesis focuses on design and analysis of the control system structure for back-to-back converter squirrel-cage induction machine drives. Particularly, sensorless control of induction machines, meaning vector control without a mechanical shaft sensor, and vector control of pulsewidth-modulated (PWM) rectifiers are considered. READ MORE

  7. 5. On Fault Detection, Diagnosis and Monitoring for Induction Motors

    Author : Mohammed Obaid Mustafa; Mohamed El Hachemi Benbouzid; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Model based fault detection and diagnosis; Model free fault detection; Set Membership Identification SMI ; Uncertainty Bounds Violation Method; Model based Support Vector Classification; Linear and Nonlinear Classification; Minimum Volume Ellipsoid method; Broken Rotor Bars; Faults of Induction Motors; Three phase induction motor; Reglerteknik; Control Engineering;

    Abstract : In this thesis, multiple methods and different approaches have been established and evaluated successfully, in order to detect and diagnose the faults of induction motors (IMs). The aim of this thesis is to present novel fault detection and isolation methods for the case of induction machines that would have the merit to be implemented online and being characterized by specific novel capabilities, when compared with the existing techniques. READ MORE