Essays about: "PWM"

Showing result 31 - 35 of 71 essays containing the word PWM.

  1. 31. Mitigation of Background Harmonic Amplification at PCC Using Active Filtering of STATCOM

    University essay from KTH/Elkraftteknik

    Author : Luai Malki; [2017]
    Keywords : FACTS; Hybrid-STATCOM; TSC; TSR; VSC; passive filter; active filter; PWM; MMC; passivity; input admittance; resonance; harmonics; ABB;

    Abstract : Shunt compensation devices have been a powerful candidate for expanding the limits of transmission facilities, allowing more active power transport and supporting voltage and overall stability of the network. An example of such devices is the Static Synchronous Compensator (STATCOM) which is based on Voltage Source Converter (VSC) which synthesizes output voltage and current for mainly reactive power compensation. READ MORE

  3. 32. Development of a Class D motor amplifier for a next-generation mechanism control electronics

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Juan Camilo Garcia Hernandez; [2016]
    Keywords : Power; electronics; satellites; BLDC; sinusoidal; commutation; control; PID; class D amplifier; PWM;

    Abstract : This thesis was written at Airbus DS GmbH in Friedrichshafen, Germany, as part of a project which aims to develop a new generation of class-D power amplification circuits for sinusoidal commutating motors controlling the movement of different mechanisms in satellites. Currently used topologies have disadvantages such as high power loss, analog controlling and high degree of signal distortion. READ MORE

  4. 33. Charging time estimation and study of charging behavior for automotive Li-ion battery cells using a Matlab/Simulink model

    University essay from KTH/Skolan för elektro- och systemteknik (EES)

    Author : Wenzhuo Wu; [2016]
    Keywords : Charging time estimation; HIL; Li-ion battery; Passive balancing; Hardware-in-the-loop; laddtid; litiumjonbatteri; passiv balansering;

    Abstract : An accurate estimation of the charging time of an automotive traction battery is possible only with the knowledge of different parameters of the battery and the vehicle. If this information is not available to the driver, the full time needed for charging of the battery may have to be assessed only from experience. READ MORE

  5. 34. Implementation of PID control using Arduino microcontrollers for glucose measurements and micro incubator applications

    University essay from Uppsala universitet/Fasta tillståndets elektronik

    Author : Hugo Andersson; Viktor Mattsson; Aleksandar Senek; [2015]
    Keywords : ;

    Abstract : The task is to build a low-cost thermostat and design necessary elements to perform a study on water mixed glucose-impedance at different temperatures and cell growth in a temperature-controlled incubator housing a magnetic field of up to 3 mT. The incubator was designed in solidworks and made to fit petri dishes of two relevant sizes and necessary wiring. READ MORE

  6. 35. Grey-Box Modelling of a Quadrotor Using Closed-Loop Data

    University essay from Linköpings universitet/Reglerteknik

    Author : Marcus Bäck; [2015]
    Keywords : System identification; Grey-box model; closed-loop identification; Two-stage method; multirotor; quadrotor; VTOL; IMU;

    Abstract : In this thesis a quadrotor is studied and a linear model is derived using grey-box estimation, a discipline in system identification where a model structure based on physical relations is used and the parameters are estimated using input-output measurements. From IMU measurements and measured PWM signals to the four motors, a direct approach using the prediction-error method is applied. READ MORE