Essays about: "Variable Frequency Drive"

Showing result 6 - 10 of 11 essays containing the words Variable Frequency Drive.

1. 6. Model Predictive Control of Electric Drives -Design, Simulation and Implementation of PMSM Torque Control

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Levente Zsolt Pap; [2018]
   Keywords : PMSM; Field Oriented Control; Model Prediction Control; Inverter; Electric Drive; DSP;

   Abstract : The thesis deals with the design of a permanent magnet synchronous machine controller that isimplemented on an embedded platform to replace the off-the-shelf controller currently being used in theelectric race car of the KTH Formula Student team. Software implementation of the control algorithmwas tested in laboratory environment on the hardware prototype of a 2-level three-phase voltage sourceinverter. READ MORE

3. 7. Experimental Comparison of Losses in a Grid-connected and M2C-fed 11kW Induction Motor

   University essay from KTH/Elektrisk energiomvandling

   Author : GUSTAV MÖRÉE; [2015]
   Keywords : power losses; electric machines; AC-machines; induction machines; harmonic content; iron losses; modular multilevel converter M2C ; effektförluster; elektriska maskiner; AC-maskiner; asynkronmaskiner; övertonsinnehåll; järnförluster; modulär multinivå omvandlare M2C ;

   Abstract : This thesis analyzes the power losses in induction machines and how the losses depend on the harmonic content of the applied voltages. Two cases are compared, one case where a machine is fed with a sinusoidial voltage and one case with a modular multilevel converter (M2C). READ MORE

4. 8. Experimental Transient Behaviour Characterisation of Induction Motor fed by Variable Frequency Drives for Pump Applications

   University essay from KTH/Elektrisk energiomvandling

   Author : Amer Halilovic; [2014]
   Keywords : Variable Frequency Drive; Centrifugal Pump; Induction Motor; Volts-per-Hertz Control; Speed Control; Overdimensioning; Frekvensomriktare; centrifugalpump; asynkronmotor; skalärkontroll; hastighetskontroll; överdimensionering;

   Abstract : The use of variable frequency drives in centrifugal pump applications has raised the question of how to select a drive. Clogging obstacles in waste water applications create unknown transient loads for the pump system. A sudden load increase occurrence can clog the pump if the drive cannot supply enough current to reach the motor’s torque demand. READ MORE

5. 9. Investigating CVT as a Transmission System Option for Wind Turbines

   University essay from KTH/Energiteknik; KTH/Kraft- och värmeteknologi

   Author : Deniz Alkan; [2013]
   Keywords : Continuously variable transmission CVT ; wind turbine drive train; blade element momentum BEM ; frequency control of wind turbines; power electronics;

   Abstract : In this study, an innovative solution is examined for transmission problems and frequency control for wind Turbines. Power electronics and the gear boxes are the parts which are responsible of a significant amount of failures and they are increasing the operation and maintenance cost of wind turbines. READ MORE

6. 10. Evaluation of Economical Impact of Energy Optimization Functions in VFDs for Industrial Applications

   University essay from KTH/Elektrisk energiomvandling

   Author : Qiang Dong; [2011]
   Keywords : ;

   Abstract : Electric motor systems are the most important types of loads which consume up to 70% of total consumed electricity in industry, so the reduction of energy  consumption in electric motor systems has become an important goal for all countries. In many of these applications, big energy savings are possible if the motors operate at variable speeds rather than at a fixed speed. READ MORE