Essays about: "harmonic power factor"

Showing result 1 - 5 of 15 essays containing the words harmonic power factor.

1. 1. Research and Testing of an Electromechanical solution for Vibration Assisted Drilling of Aerospace Materials

   University essay from Uppsala universitet/Solcellsteknik

   Author : Jonathan Nordenholm; [2020]
   Keywords : vibration; drilling; chips; aerospace; advanced drilling unit;

   Abstract : This thesis considers vibration drilling in aerospace materials. The tolerances of the drilled holes in aerospace industry are very low since hole quality is an important factor. Conventional methods of drilling create long ribbon formed chips that increases the heat formation and decreases the hole quality. READ MORE

3. 2. Isolated Single-Stage Interleave Resonant PFC Rectifier with Active and Novel Passive Output Ripple Cancellation Circuit

   University essay from Uppsala universitet/Institutionen för elektroteknik

   Author : Abidemi Oluremilekun Eleyele; [2020]
   Keywords : single-stage AC DC converter; bridgeless power factor correction PFC rectifier; active passive ripple cancellation; zero current switching ZCS ; zero voltage switching ZVS ; Electric vehicle EV charger; LLC;

   Abstract : With the increasing demand for fast, cheaper, and efficient power converters come the need for a single-stage power factor correction (PFC) converter. Various single-stage PFC converter proposed in the literature has the drawback of high DC bus voltage at the input side and together with the shift to wide bandgap switches like GaN drives the converter cost higher. READ MORE

4. 3. Developing Verification Models for Corona Discharge Suppression in High Voltage Capacitor Banks

   University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

   Author : Mohammadjavad Javadi; [2020]
   Keywords : Corona discharge; Suppression ring; High voltage capacitor banks;

   Abstract : Due to the universal considerable population and economic growth rate, demands for energy have risen significantly over the past decade. This means that the integration of renewable energies in the power grid has escalated as well as requests for reactive power compensation, voltage stability, and mitigation of harmonic filters. READ MORE

5. 4. Digitally Controlled Oscillator for mm-Wave Frequencies

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Rikard Gannedahl; Johan Holmstedt; [2018]
   Keywords : RF; RFIC; oscillator; DCO; mm-wave; Technology and Engineering;

   Abstract : In the fifth generation of mobile communication, 5G, frequencies above 30 GHz, so-called millimeter-wave (mm-wave) frequencies are expected to play a prominent role. For the synthesis of these frequencies, the all-digital phase locked loop (ADPLL) has recently gained much attention. READ MORE

6. 5. Evaluation of power quality and common design concept for AC-DC converters in aircraft

   University essay from

   Author : Andreas Brolund; [2017]
   Keywords : AC-DC; converter; aircraft; power electronics; MOSFET; MEA; More electric aircraft; Delta-switch; ATRU; Auto-transformer rectifier unit; Auto-transformer; Vienna rectifier; passive rectifier; active rectifier; power factor correction; APFC; PFC; MATLAB; Simulink; THD; total harmonic distortion;

   Abstract : This master thesis has been carried out in collaboration with Saab, Avionics Systems in Jönköping, Sweden, during the spring of 2017. The thesis investigates unidirectional rectifier topologies in aircraft and the focus has been on evaluating the power quality requirements according to the aircraft standards, in the course of the More Electric Aircraft concept. READ MORE