Sökning: "stress in electrical motor"

Hittade 5 uppsatser innehållade orden stress in electrical motor.

  1. 1. Elimination of Harmonic Disturbances in Softstarters

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

    Författare :Raheleh Mahdivand Avilagh; [2021]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Power system infrastructure has been facing many challenges when it comes to harmonics distortion, and power electronic devices are no exception considering their wide usage in the system. In this thesis the focus is on the impact of these system harmonics on the electrical motors which are vastly used in industry for different applications. LÄS MER

  3. 2. Implementing an agitator with a soft starter controlled by a new HMI

    Kandidat-uppsats, Lunds universitet/Högskoleingenjörsutbildning i datateknik

    Författare :Sara Malmström; Fredrik Johansson; [2017]
    Nyckelord :automation; plc; hmi; soft start; agitator; Technology and Engineering;

    Sammanfattning : When an agitator is in commission for an extended period of time the impellers can become clogged. In order to clean the impeller, the agitator is runned backwards. This is one of the main functions for a product that CG Drives & Automation is developing for a customer in the agitator business. LÄS MER

  4. 3. Damper Winding Fault Detection in Synchronous Machines

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Fredrik Holmgren; [2016]
    Nyckelord :Fault detection; condition monitoring; motor diagnostics; synchronous machines; synchronous motors; electrical machines; motor drives; damper winding; damper bars;

    Sammanfattning : This thesis aims to identify methods for detection of damper winding faults in synchronous machines (SMs) powered by variable frequency drives (VFDs). The problem of failing damper windings has received attention after reports of serious damage which have been discovered during maintenance checks. LÄS MER

  5. 4. Hardware Synthesis of Automated Electrical Fault Testing in Trucks

    Uppsats för yrkesexamina på avancerad nivå, KTH/Mikro- och nanosystemteknik

    Författare :Martin Orre; [2015]
    Nyckelord :;

    Sammanfattning : In modern trucks there is a number of control units, which tasks are varying; control of the engine, brakes, gearbox, etc. In order to ensure that these devices work properly, they must be thoroughly tested under normal conditions but also when they are exposed to stresses such as electrical faults (short circuit, breaks, etc.). LÄS MER

  7. 5. Automated control and test system for long time stess tests of microwave ovens

    Magister-uppsats, Institutionen för teknik och naturvetenskap; Tekniska högskolan

    Författare :Anders Appelgren; [2010]
    Nyckelord :;

    Sammanfattning : To be able to improve products extensive testing is required in order to find hidden flaws in the design. The earlier flaws are found the higher are the probability that they can be corrected before the product is released onto the market. LÄS MER