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IEE Proceedings B - Electric Power Applications

Issue 5 • Date September 1988

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Displaying Results 1 - 18 of 18
  • DC-to-utility interface using sinewave resonant inverter

    Publication Year: 1988, Page(s):193 - 201
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1039 KB)

    A line-current modulated high-frequency (HF) link DC-to-utility interface power conditioning (DC/UIPC) system using a sinewave output resonant inverter is proposed. The proposed system consists of a sinewave output HF resonant inverter, a rectifier and a line connected inverter (LCI). The system is modelled using a constant current model for the HF inverter, and a Step model for the DC link curren... View full abstract»

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  • Optimal designs for multilayer air-cored toroidal inductors with circular windows

    Publication Year: 1988, Page(s):202 - 209
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1087 KB)

    The problem of winding the greatest possible inductance with a given length of wire is solved for multilayered air-cored toroids with circular window sections. Calculations indicate significant improvements over single-layer designs, and are confirmed by measurements on devices using two different fabrication methods. The optimum designs are robust against fabrication errors: provided the wire len... View full abstract»

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  • Modelling of inverter-controlled asynchronous drives for system simulation in DC railways

    Publication Year: 1988, Page(s):210 - 217
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (958 KB)

    AC inverter drives are being increasingly used for DC-supplied railways. Since simulation techniques are now routinely used for the system design of railways, there is a need to accurately model this type of equipment which is being introduced by several railway organisations. This paper describes models developed for representing the tractive effort and the DC electrical terminal characteristics ... View full abstract»

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  • Simplified configuration of GTO current source inverter for induction motor drives

    Publication Year: 1988, Page(s):218 - 223
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (606 KB)

    A simplified current source inverter (CSI), employing gate turn-off thyristors in which one capacitor is removed from the conventional star or delta-connected bypass capacitor circuit, is presented. This simplification gives rise to an unbalanced load condition. To demonstrate the effect of this circuit, voltage and current waveforms of a simplified CSI-induction motor system under the optimal pul... View full abstract»

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  • Current pulses in switched reluctance motor

    Publication Year: 1988, Page(s):224 - 230
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (523 KB)

    At high speed there are single pulses of current in the windings of a switched reluctance motor. A statistical analysis of current data shows that simple mathematical models describe current as a function of rotor position. Peak values of current are shown to vary with the inverse of rotor speed when the two control angles have constant values. View full abstract»

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  • New dynamic inductance concept and its application to synchronous machine modelling

    Publication Year: 1988, Page(s):231 - 239
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (813 KB)

    The transformer voltage terms in the generalised equations that describe the performance of the saturated electrical machine under dynamic conditions, involve some error. In this paper, a method is presented for the calculation of dynamic saturated inductances that, when used instead of the static ones, removes this error. The rotational voltage terms are still correctly calculated using the conve... View full abstract»

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  • Computer-aided design of PWM power-electronic variable-speed drives

    Publication Year: 1988, Page(s):240 - 260
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2709 KB)

    Computer-aided design (CAD) techniques are presented which enable electrical machine models to be developed and included in circuit analysis CAD packages. The techniques are demonstrated using a 3-phase induction motor model as an example, based on the 2-axis machine equations. Simulation results produced from this motor model are shown to compare favourably with experimental results obtained from... View full abstract»

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  • Improvement of current loop response of thyristor DC drive by time-domain approximation

    Publication Year: 1988, Page(s):261 - 268
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (826 KB)

    The current-loop response of a DC thyristor drive contains significant nonlinearities, dependent upon operating conditions. Control methods based upon frequency-response analysis give imperfect results, but fully-developed time-domain analysis of the output waveform demands excessive computing power. An approximate time-domain approach has been identified and implemented which improves the control... View full abstract»

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  • Microprocessor implementation of new optimal PWM switching strategies

    Publication Year: 1988, Page(s):269 - 280
    Cited by:  Papers (35)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1616 KB)

    The microprocessor implementation of new optimal PWM switching strategies are presented, and the special features, characteristics and advantages of various microprocessor configurations are demonstrated. All the necessary microprocessor hardware/software techniques and algorithms required to implement and generate the new optimal PWM strategy on-line and in real time are developed in detail, and ... View full abstract»

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  • Microprocessor implementation of new optimal PWM switching strategies

    Publication Year: 1988, Page(s):269 - 280
    Cited by:  Papers (35)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1140 KB)

    The microprocessor implementation of new optimal PWM switching strategies are presented, and the special features, characteristics and advantages of various microprocessor configurations are demonstrated. All the necessary microprocessor hardware/software techniques and algorithms required to implement and generate the new optimal PWM strategy on-line and in real time are developed in detail, and ... View full abstract»

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  • Improvement of current loop response of thyristor DC drive by time-domain approximation

    Publication Year: 1988, Page(s):261 - 268
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (576 KB)

    The current-loop response of a DC thyristor drive contains significant nonlinearities, dependent upon operating conditions. Control methods based upon frequency-response analysis give imperfect results, but fully-developed time-domain analysis of the output waveform demands excessive computing power. An approximate time-domain approach has been identified and implemented which improves the control... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Computer-aided design of PWM power-electronic variable-speed drives

    Publication Year: 1988, Page(s):240 - 260
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1984 KB)

    Computer-aided design (CAD) techniques are presented which enable electrical machine models to be developed and included in circuit analysis CAD packages. The techniques are demonstrated using a 3-phase induction motor model as an example, based on the 2-axis machine equations. Simulation results produced from this motor model are shown to compare favourably with experimental results obtained from... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Current pulses in switched reluctance motor

    Publication Year: 1988, Page(s):224 - 230
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    At high speed there are single pulses of current in the windings of a switched reluctance motor. A statistical analysis of current data shows that simple mathematical models describe current as a function of rotor position. Peak values of current are shown to vary with the inverse of rotor speed when the two control angles have constant values View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • DC-to-utility interface using sinewave resonant inverter

    Publication Year: 1988, Page(s):193 - 201
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (808 KB)

    A line-current modulated high-frequency (HF) link DC-to-utility interface power conditioning (DC/UIPC) system using a sinewave output resonant inverter is proposed. The proposed system consists of a sinewave output HF resonant inverter, a rectifier and a line connected inverter (LCI). The system is modelled using a constant current model for the HF inverter, and a step model for the DC link curren... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New dynamic inductance concept and its application to synchronous machine modelling

    Publication Year: 1988, Page(s):231 - 239
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (480 KB)

    The transformer voltage terms in the generalised equations that describe the performance of the saturated electrical machine under dynamic conditions, involve some error. A method is presented for the calculation of dynamic saturated inductances that, when used instead of the static inductances, removes this error. The rotational voltage terms are still correctly calculated using the conventional ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal designs for multilayer air-cored toroidal inductors with circular windows

    Publication Year: 1988, Page(s):202 - 209
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (828 KB)

    The problem of winding the greatest possible inductance with a given length of wire is solved for multilayered air-cored toroids with circular window sections. Calculations indicate significant improvements over single-layer designs, and are confirmed by measurements on devices using two different fabrication methods. The optimum designs are robust against fabrication errors, provided the wire len... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modelling of inverter-controlled asynchronous drives for system simulation in DC railways

    Publication Year: 1988, Page(s):210 - 217
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (664 KB)

    AC inverter drives are being increasingly used for DC-supplied railways. Since simulation techniques are now routinely used for the system design of railways, there is a need to accurately model this type of equipment which is being introduced by several railway organisations. The authors describe models developed for representing the tractive effort and the DC electrical terminal characteristics ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simplified configuration of GTO current source inverter for induction motor drives

    Publication Year: 1988, Page(s):218 - 223
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    A simplified current source inverter (CSI), employing gate turn-off thyristors in which one capacitor is removed from the conventional star or delta-connected bypass capacitor circuit, is presented. This simplification gives rise to an unbalanced load condition. To demonstrate the effect of this circuit, voltage and current waveforms of a simplified CSI-induction motor system under optimal pulsewi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.