Essays about: "thermomechanical cycling"

Found 4 essays containing the words thermomechanical cycling.

  1. 1. Prognostics for Condition Based Maintenance of Electrical Control Units Using On-Board Sensors and Machine Learning

    University essay from Linköpings universitet/Fordonssystem

    Author : Gabriel Fredriksson; [2022]
    Keywords : machine learning; random forest; random survival forest; condition based maintenance; cbm; reliability; solder joint failure; thermomechanical cycling; ECU; lifetime prediction; data-driven; statistics; BGA; PCBA; field quality; maintenance; truck; bus; vehicle;

    Abstract : In this thesis it has been studied how operational and workshop data can be used to improve the handling of field quality (FQ) issues for electronic units. This was done by analysing how failure rates can be predicted, how failure mechanisms can be detected and how data-based lifetime models could be developed. READ MORE

  3. 2. Thermomechanical stress analysis of the main insulation system of traction electrical machines

    University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Author : Dahman Ismail; Alexis Andrei; [2020]
    Keywords : finite element analysis; thermo-mechanical stress; heavy-duty vehicle; electrical machine; insulation system; coupled-temperature displacement analysis; finita element analys; termomekaniska spänningar; lastbilar; elektriska motorer; isolering; termisk kopplingsförbindelse;

    Abstract : More efficiency heavy-duty vehicles are developed with higher range, updated electronic and mechanical parts. The fuel efficiency and pollution of carbon dioxide need to be lower to achieve new EU regulations. The global population increases with an increased number of heavy-duty vehicles. This, in turn, increases the emission. READ MORE

  4. 3. Optimization of through-silicon via structures in a fingerprint sensor package

    University essay from Lunds universitet/Avdelningen för Biomedicinsk teknik

    Author : Gustaf Onsbring Gustafson; [2017]
    Keywords : Through-silicon via; Fingerprint sensor; Semiconductor package; Technology and Engineering;

    Abstract : The through-silicon via (TSV) is a type of vertical electrical connection that can pass through a silicon wafer or die. By using TSVs, compared to using wire bonding as interconnections in a capacitive fingerprint sensor, the capacitive strength between the sensor die and the finger can be increased. READ MORE

  5. 4. Life Length and Stress Tests of Electric Machines for Electric Vehicles

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Raul Sanz Desco; [2017]
    Keywords : Electrical machines; winding insulation; power cycling; thermomechanical stresses; winding cooling;

    Abstract : Electrical machines have been widely used along the last decades with large life length under operating conditions. However, they will become more important in the upcoming years because of the emerging electric car industry. Thus, the maintenance cost of this technology can be reduced by extending the lifetime in the electrical machines. READ MORE