Essays about: "stator winding insulation"
Showing result 1 - 5 of 7 essays containing the words stator winding insulation.
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1. Dielectric Response and Partial Discharge Characteristics of Stator Winding Insulation System with SiC Stress Grading
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : The typical construction of a stator coil includes the use of end corona protection (ECP)coating, which is made of semi-conductive materials like silicon carbide (SiC). Thepurpose of ECP is to smooth the electric stress distribution near the slot exit, limitingthe electric field and partial discharge (PD) activity within the insulation system. READ MORE
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2. Real-time detection of stator resistance unbalances in three phase drives
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : An estimated 30% of the faults in Induction Machine (IM) are related to its stator. These faults are mostly in the form of an Inter-Turn Short Circuit (ITSC) fault i.e., when two winding inside the stator of IM are shorted due to insulation failure. READ MORE
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3. Implementing VLF as diagnostic test for HV motors and generators : A comparative study of diagnostic tests performed at different frequencies
University essay from Uppsala universitet/Institutionen för teknikvetenskaperAbstract : High voltage testing of the stator winding insulation is one of the most recognized methods used to determine the state of degradation in the insulation. HV tests performed at 0.1 Hz do have potential advantages compared to more traditional 50 Hz tests. READ MORE
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4. High-Frequency Voltage Distribution Modelling of a Slotless PMSM from a Machine Design Perspective
University essay from KTH/ElkraftteknikAbstract : The introduction of inverters utilizing wide band-gap semiconductors allow for higher switching frequency and improved machine drive energy efficiency. However, inverter switching results in fast voltage surges which cause overvoltage at the stator terminals and uneven voltage distribution in the stator winding. READ MORE
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5. Environmental stress of electrical machine winding insulation
University essay from Uppsala universitet/ElektricitetsläraAbstract : The conducting winding of an electrical machine is insulated in order to prevent any short circuits to occur within the machine. This insulation is during its lifetime exposed to several environmental stresses and therefore plays an important role in the life length of the machine. READ MORE