Essays about: "Frekvensomriktare"
Showing result 1 - 5 of 6 essays containing the word Frekvensomriktare.
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1. Condition monitoring of induction machines using a signal injection technique
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : Condition monitoring techniques can be employed to enhance reliability of electric machinery. The stator winding fault is one of the dominant causes for the failure of induction machines. In this work, the condition monitoring of an inverter-fed induction machine using high-frequency signal injection based technique is investigated. READ MORE
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2. Compensating the Changing Reactive Power in the Medium-Voltage Grid in Stockholm
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : A decline in inductive reactive power has been noted by several DNOs around Europe for the last decade. Why this is happening is unknown. One of the DNOs is the Swedish DNO Ellevio AB that has seen large decreases in demand of inductive reactive power from their primary substations. READ MORE
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3. Model Predictive Control of Electric Drives -Design, Simulation and Implementation of PMSM Torque Control
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)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
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4. Interconnection requirements for distributed electricity generation based on low temperature heat : Mapping of requirements and their possible effects on the HP150
University essay from KTH/EnergiteknikAbstract : The electricity generation is changing. In the grid there is more and more distributed generation installed and the expansion is expected to continue further. The main difference in production of distributed generation units in comparison to a classic power plant is the mass production. READ MORE
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5. Experimental Transient Behaviour Characterisation of Induction Motor fed by Variable Frequency Drives for Pump Applications
University essay from KTH/Elektrisk energiomvandlingAbstract : 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
