Essays about: "shaft current"

Showing result 16 - 20 of 34 essays containing the words shaft current.

  1. 16. Construction, testing and verification of a brushless excitation system with wireless control of the field current in a synchronous generator.

    University essay from Uppsala universitet/Elektricitetslära

    Author : Rickard Larsson; Kenny Andersson; [2018]
    Keywords : Brushless excitation; synchronous generator; bluetooth; torque ripple; Borstlös matning; synkrongenerator; blåtand; momentpulsationer;

    Abstract : Synchronous generators have been used in hydropower from more than a century where, traditionally, the field current is transferred to the rotor using slip rings and carbon brushes. There are some major disadvantages following the use static excitation; regular and expensive maintenance, as well as a source of carbon dust which, due to buildup, may cause short circuits. READ MORE

  3. 17. Bearing current and shaft voltage measurement in electrical motors

    University essay from Högskolan Väst/Avdelningen för data-, elektro- och lantmäteriteknik

    Author : Edo Kolic; [2017]
    Keywords : Modulated drive; electrical motors; production;

    Abstract : Due to the fast-rising voltage pulses of pulse width modulated drives, the generated shaft voltage of electrical motors causes electrical discharge currents in bearings. These discharges can cause bearing failure leading to costly maintenance and unexpected production stops. READ MORE

  4. 18. Velocity estimation in land vehicle applications - Sensor Fusion using GPS, IMU and Output-shaft

    University essay from KTH/Optimeringslära och systemteori

    Author : Christian Jonsson; [2016]
    Keywords : ;

    Abstract : In this project an alternative velocity-signal for Scania’s heavy-duty vehicles was investigated. The current velocity estimation is based on wheel-encoders obtained from other control-units like ABS- and EBSsystems. Furthermore the wheel-encoders may have poor properties at both high and low velocites. READ MORE

  5. 19. Shaft Current Protection

    University essay from KTH/Industriella informations- och styrsystem

    Author : Tin Rabuzin; [2015]
    Keywords : shaft current; Rogowski coil; generator protection; Merging Unit; process bus; axelströom; lagerströom; Rogowskispole; generatorskydd; Merging Unit; process bus;

    Abstract : Shaft current protection in hydro and turbo generators is an important generatorprotection issue. Currents owing in the generator shaft might damagegenerator bearings which, in turn, could reduce operating time and cause largenancial losses. Therefore, it is important to prevent operation of the generatorunder conditions of high shaft currents. READ MORE

  6. 20. Control of Double Inverted Pendulum First Approach

    University essay from

    Author : Teerapong DABRETAU; Ali DAREINI; [2015]
    Keywords : Double inverted pendulum; nonlinear system; unstable dynamic system; dc motor; Maxon device; Hough transform; edge detection; pattern recognition; vision system; NI MYRIO; LabVIEW; MATLAB; PSPICE;

    Abstract : An Inverted double pendulum is a combination of two individual pendulums which represents an example of a nonlinear and unstable dynamic system and it is also a good example of a physical system which can exhibit chaotic behavior.This document contains a first analysis of the model and the control of this system. READ MORE