Sökning: "Coupling"

Visar resultat 1 - 5 av 440 uppsatser innehållade ordet Coupling.

  1. 1. Testing Direct Coupling Analysis on HP Model Proteins

    Kandidat-uppsats, Lunds universitet/Teoretisk partikelfysik; Lunds universitet/Institutionen för astronomi och teoretisk fysik

    Författare :Mustafa Kadhim; [2018]
    Nyckelord :Direct Coupling Analysis HP model proteins; Physics and Astronomy;

    Sammanfattning : Direct coupling analysis (DCA) models correlations in sets of related (homologous) protein sequences using a Potts-like spin model ansatz. From the couplings of the Potts model, derived by inverse statistical mechanics, residue-pair contacts in the 3D structure of the protein are predicted. LÄS MER

  2. 2. On SPMSM rotor position estimation from standstill and for low speeds - Evaluation of techniques for estimating position and speed of an SPMSM

    H-uppsats, Chalmers tekniska högskola/Institutionen för elektroteknik

    Författare :Victor Johansson; [2018]
    Nyckelord :Sensorless; position; estimation; surface-mounted; permanent; magnet; machines; SPMSM;

    Sammanfattning : Knowing the rotor position is essential for performing field-oriented control of permanentmagnet synchronous machines. Sometimes, sensorless strategies are employedinstead of using sensors in order to estimate the rotor position. LÄS MER

  3. 3. High-Frequency Voltage Distribution Modelling of a Slotless PMSM from a Machine Design Perspective

    Master-uppsats, KTH/Elkraftteknik

    Författare :Patrik Brauer; [2018]
    Nyckelord :Windings; drives; transients; surges; steep-fronted; slotless; litz-wire; effective relative permeability; Lindningar; elektriska drivlinor; transienter; spänningspulser; litz-tråd; effektiv relativ permeabilitet;

    Sammanfattning : 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. LÄS MER

  4. 4. Millimeter Wave Antenna Array Calibration and Validation for 5G New Radio Access

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Manuel Jose Lopez Morales; [2018]
    Nyckelord :Technology and Engineering;

    Sammanfattning : This Master thesis work was performed in Ericsson AB, Lund. It studies and validates two classes of algorithms to be used in mm-wave massive MIMO antenna arrays, for their use in the future 5G mobile communication systems. LÄS MER

  5. 5. Assembly of a tire and a vehicle model to predict vibrations at the bushings

    H-uppsats, Chalmers tekniska högskola/Institutionen för arkitektur och samhällsbyggnadsteknik

    Författare :Michael Westers; Rosholm Johan; [2018]
    Nyckelord :patial audio; spatial enhancenment; upmix; primary ambience extraction; adaptive filtering;

    Sammanfattning : This Master’s thesis targets the prediction of vibrations at the bushings of vehicle rear chassis due to an excitation at the tire patch for early analysis in the devel-opment stage at the Volvo Car Group. In the past a hybrid model has been used, which included a FEM model of a new vehicle design proposal and through mea-surements obtained spindle forces of an existing tire vehicle combination. LÄS MER

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