Search for dissertations about: "power electronics 2010"

Showing result 1 - 5 of 15 swedish dissertations containing the words power electronics 2010.

2. 1. Electromagnetic characterization of power electronic systems

   Author : Mathias Enohnyaket; Mats Alaküla; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

   Abstract : Propelled by increased global awareness and demand for clean energy systems, there is a growing trend in transportation, utility, industrial, and residential applications towards the utilisation of power electronic systems with enhanced power ow controllability and eciency. Examples of power electronics applications include terminal converters in high-voltage direct Current (HVDC) transmission; exible AC transmission systems (FACTS); and converters to interface alternative energy systems such as wind turbines to the grid, variable-speed motor drives in pump systems, vehicular propulsion systems, air-conditioners, and refrigerators. READ MORE

4. 2. Enhancing Radio Frequency System Performance by Digital Signal Processing

   Author : Charles Nader; Peter Händel; Niclas Björsell; Thomas Eriksson; Högskolan i Gävle; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Elektronik;

   Abstract : In this thesis measurement systems for the purpose of characterization of radio frequency power amplifiers are studied. Methods to increase the speed, accuracy, bandwidth, as well as to reduce the sampling requirements and testing cost are presented. READ MORE

5. 3. Coordination of protection system and VSC-HVDC to mitigate cascading failures

   Author : Rujiroj Leelaruji; Lennart Söder; Jianping Wang; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric power engineering; Elkraftteknik;

   Abstract : The rapid development of the global economics has made power systems allover the world become large-scale interconnected grids. This increases the capabilityof power grids to transfer power over the long distance to serve the desiredpower demand with the minimum cost of operation. READ MORE

6. 4. On Inter-bar Currents in Induction Motors with Cast Aluminium and Cast Copper Rotors

   Author : Alexander Stening; Chandur Sadarangani; Ola Aglén; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Induction motors; Inter-bar currents; Copper rotors; Aluminium rotors; Starting torque; Asynchronous torques; Starting current; Stray losses; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Abstract : This thesis presents a study of the effects of inter-bar currents on inductionmotor starting performance and stray-load losses. The work is focused on theperformance differences between aluminium and copper casted rotors.A method to predict the stator current when starting direct-on-line isdeveloped. READ MORE

7. 5. Study of Wired and Wireless Data Transmissions

   Author : Allan Huynh; Shaofang Gong; Li-Rong Zheng; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Elektronik;

   Abstract : The topic of this dissertation is divided into two parts where the first part presents high-speed data transmission on flexible cables and the second part presents a wireless remote monitoring and controlling system with wireless data transmission.The demand on high-speed data communications has pushed both the wired and wireless technologies to operate at higher and higher frequencies. READ MORE