Search results for: ac

• Lingua ac Communitas

  Journals

  ISSN: 1230-3143

• Estimation of the uncertainty of the AC/AC transducer output voltage

  Publication

  • A. Dzwonkowski
  • A. Golijanek-Jędrzejczyk

  - Przegląd Elektrotechniczny - Year 2015

  The paper presents a methodology for estimating uncertainty of voltage transducers processing function, on the example of CYVS411D07 voltage transducers. The analysis was conducted using the method based on the GUM Guide propagation of uncertainty law and the determination of the coverage factor based on the effective number of degrees of freedom (t-Student distribution). The paper also presents example evaluation results of measured...

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• Single and Three -Phase PWM AC/AC Converters as Semiconductor Transformers

  Publication

  • R. Strzelecki
  • N. Strzelecka

  - Year 2020

  AC voltage transformation circuits contain pure or reactance PWM AC/AC converters. These circuits can be treated as AC/AC semiconductor transformers. This paper reviews single-phase and three-phase topologies: both non-isolated and isolated, single as well as two quadrant structure. Additionally, this paper present selected examples of their applications.

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• AC loss measurements in superconducting magnet

  Publication

  • P. Szwangruber

  - Year 2008

  This report contains ordered theoretical informations about AC loss in superconducting magnets and cables. A software program to evaluate data from AC loss measurements with V-I method was made and it is also described. Examples of measurement data and result data are shown here.

• Analiza i badania transformatora hybrydowego z przekształtnikiem AC/DC/AC współdziałającym z przełącznikiem zaczepów

  Publication

  • W. Matelski

  - Year 2023

  Rozprawa dotyczy badań nad układem transformatora hybrydowego, który oprócz możliwości regulacji ciągłej napięcia za pomocą przekształtnika energoelektronicznego, posiada układ regulacji skokowej w postaci przełącznika zaczepów. Badane urządzenie przeznaczone jest do stabilizacji napięcia w dystrybucyjnej sieci niskiego napięcia. Dzięki skoordynowanej pracy układów (ciągłego i skokowego) uzyskana zostaje tzw. Wielostrefowa Regulacja...

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• Hybrid stepless distribution transformer with four-quadrant AC/DC/AC converter at low voltage side - simulation tests

  Publication

  • R. Strzelecki
  • W. Matelski
  • V. Tomasov

  - Przegląd Elektrotechniczny - Year 2018

  The article presents the work of the stepless hybrid distribution transformer (HT), as an alternative to the so far applied Automatic Voltage Regulator (AVR) solutions, used to control the voltage in the power system in terms of the fundamental harmonic. The HT is a combination of a conventional distribution transformer and an AC/DC/AC converter connected in series with the transformers secondary winding. In the work the basic...

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• AC Motor Voltage and Audible Noise Dataset

  Publication

  • B. Pałczyńska

  - Year 2022

  The dataset titled AC motor voltage and audible noise waveforms in ship’s electrical drive systems with frequency converters contains the voltage and sound measurement results recorded in a marine frequency controlled AC drive system. The dataset is part of research focussing on the impact of the ship’s electrical drive systems with frequency converters on vibrations and the level of audible noise on ships. The dataset allows the...

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• Destructive impact of PWM inverters on traction AC motors

  Publication

  • J. Łuszcz
  • P. Dworakowski

  - ELECTROMOTION - Year 2010

  The electric traction drives with an AC motor fed by a frequency converter are used more and more often nowadays. The most significant side effects, of a converter's output voltage forming PWM method for AC motor windings, are steep voltage changes, which can initiate several destructive phenomena. The paper presents the adverse influence of a converter common mode voltage on the motor windings's increased voltage exposure and...

• High Performance Control of AC Drives with Matlab/ Simulink

  Publication

  • A. Haitham
  • A. Iqbal
  • J. Guziński

  - Year 2021

  Explore this indispensable update to a popular graduate text on electric drive techniques and the latest converters used in industry. The Second Edition of High Performance Control of AC Drives with Matlab®/Simulink delivers an updated and thorough overview of topics central to the understanding of AC motor drive systems. The book includes new material on medium voltage drives, covering state-of-the-art technologies and challenges...

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• Multiscalar Model Based Control Systems for AC Machines

  Publication

  • Z. Krzemiński

  - Year 2011

  Contents of the Chapter: Nonlinear transformations and feedback linearization. Models of the squirrel cage induction machine: Vector model of the squirrel cage induction machine. Multiscalar models of the squirrel cage induction machine.Feedback linearization of multiscalar models of the induction motor.Models of the double fed induction machine: Vector model of the double fed induction machine. Multiscalar model of the...