Essays about: "low frequency currents"

Showing result 6 - 10 of 22 essays containing the words low frequency currents.

  1. 6. Quantifying Middle Frequency Transient Currents in Power Consuming Devices

    University essay from Uppsala universitet/Institutionen för elektroteknik

    Author : Alex Lundvall; Vincent Sollie; [2021]
    Keywords : ;

    Abstract : The complexity of electrical systems present in vehicles is continuously rising and the number of interconnected electrical devices is growing during the strive for optimization and reaching higher efficiency levels. Actuation of said devices have the possibility of injecting voltage and current harmonics into the system, thus negatively affecting neighbouring devices. READ MORE

  3. 7. Condition monitoring of induction machines using a signal injection technique

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Sathiya Lingam Senthil Kumar; [2020]
    Keywords : Condition monitoring; fault detection; fault diagnosis; stator winding fault; inter-turn fault.; Tillståndsövervakning; feldetektering; feldiagnos; statorlindningsfel; kortslutning mellan varv.;

    Abstract : Condition monitoring techniques can be employed to enhance reliability of electric machinery. The stator winding fault is one of the dominant causes for the failure of induction machines. In this work, the condition monitoring of an inverter-fed induction machine using high-frequency signal injection based technique is investigated. READ MORE

  4. 8. Impact of Surrounding Objects on Inductive Wireless Power Transfer

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Brenda Odhiambo; [2019]
    Keywords : Wireless power transfer; inductive coupling; Qi Specification; effect of metals; Technology and Engineering;

    Abstract : Many new models of smartphones and small electronic devices are using their wireless charging feature as a key selling point. This is due to the convenience of cable-free charging as well as not requiring multiple power adapters for charging different devices. READ MORE

  5. 9. Power cables in battery electric vehicles used in underground mining : Analysis of electromagnetic dynamics in high-power cables and development of application-specific design strategies for reduction of EMI

    University essay from Uppsala universitet/Elektricitetslära

    Author : Chisom Miriam Ekweoba; [2019]
    Keywords : ;

    Abstract : The electrification of the automotive industry is growing in popularity, considering the environmental impacts of the conventional diesel-powered automobile. However, from the electromagnetic compatibility (EMC) viewpoint, it is observed that the use of variable-frequency drives (VFD) and relatively high-power cables to propel electrical motors has led to a considerable rise in electromagnetic interference (EMI) within and outside the machine. READ MORE

  6. 10. An investigation of the relationships between electrotactile stimulus parameters, primary afferent response, and perceived sensation

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Jessica Sofie Louise Vidmark; [2018]
    Keywords : electrotactile stimulation; psychophysical sensation; primary afferent response; sensory feedback; prosthetics; elektrisk hudstimulering; psykofysisk respons; primärafferent respons; sensorisk återkoppling; proteser;

    Abstract : Sensory feedback possesses the possibility of adding a new dimension to many applications, including, but not limited to, prosthetics and surgical robots for improved control, virtual reality for incorporation of another sense, and phantom limb pain reduction for amputees. Electrotactile stimulation provides a compact, light-weight, energy efficient, highly responsive, and non-invasive option for sensory feedback; however, it has been found to commonly elicit unnatural or uncomfortable sensations for the user. READ MORE