IEE Proceedings - Electric Power Applications

IEE Proceedings - Electric Power Applications

Online ISSN 1359-7043
Print ISSN 1350-2352

Published from 1994-2006, IEE Proceedings - Electric Power Applications contained significant and original contributions on the applications of electric power. The scope covered a wide range of applications and apparatus in the power field. In addition to papers focussing on the design and development of electrical equipment, papers relying on analysis were also included.

This journal was previously known as IEE Proceedings B (Electric Power Applications) 1980-1993. ISSN 0143-7038. more..

This publication is continued by IET Electric Power Applications 2007-. ISSN 1751-8660. more..

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Load-imposed instability and performance degradation in a regulated converter
- Author(s): M. Hankaniemi ; M. Karppanen ; T. Suntio
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- p. 781 –786 (6)
  The stability and performance of a regulated converter is analysed based on its closed-loop output impedance. System theory is used to obtain a set of transfer functions that define the internal stability of an interconnected system consisting of source and load converters. The internal stability is described in terms of the ratio of the output impedance of the source converter and the input impedance of the load converter known as the minor-loop gain. Thus, the closed-loop output impedance of a source converter can be used to define safe operating areas that avoid instabilities in the load impedance. It is shown that the margins associated with the minor-loop gain (i.e. the gain and phase margins) do not generally match the margins of the output-voltage loop gain. The relationship is especially weak at frequencies close to and beyond the crossover frequency of the loop gain. This means that the margins given to the minor-loop gain should be gradually increased as the voltage-loop-gain crossover frequency is approached so as to avoid performance degradation (i.e. changes in margins and crossover frequency) in the supply converter. Experimental evidence is provided based on a buck converter under voltage- and peak-current-mode control.
Simplified control method for parallel-connected DC/AC inverters
- Author(s): K.-D. Wu ; J.-C. Wu ; H.-L. Jou ; C.-Y. Chen ; C.-Y. Lin
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- p. 787 –792 (6)
  The parallel operation of several low-capacity inverters is better than a singular high-capacity inverter owing to the advantages of better extensibility and reliability. A simplified control method for parallel-connected inverters is proposed, which can balance the current distribution among the parallel-connected inverters with no interconnected communication lines. To verify the performance of the proposed control method, a prototype consisting of two inverters has been developed. The experimental results verify that the performance of the proposed control method is as desired.
Radial force density and vibration characteristics of modular permanent magnet brushless AC machine
- Author(s): J. Wang ; Z.P. Xia ; S.A. Long ; D. Howe
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- p. 793 –801 (9)
  The radial force density harmonics and vibrational characteristics of a three-phase modular permanent magnet brushless AC machine is investigated. It is shown that, owing to the presence of a large number of low- and high-order stator space harmonic magnetomotive forces, modular machines are more likely to exhibit higher low-frequency vibrations than conventional permanent magnet brushless machines. Experimental results support the analysis and its findings.
Classification and synthesis of power gyrators
- Author(s): A. Cid-Pastor ; L. Martinez-Salamero ; C. Alonso ; G. Schweitz ; J. Calvente ; S. Singer
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- p. 802 –808 (7)
  A systematic procedure to synthesise power gyrators for variable switching frequency operation is presented. Based on the gyrator equations, topological constraints are first established and two types of gyrators, i.e. G and R, are defined. A boost converter with an output filter and the Čuk converter are shown to have the unconditionally stable characteristics of G-gyrators with a controlled input current whereas a buck converter with an input filter and also the Čuk converter are shown to behave as G-gyrators with a controlled output current if damping networks are inserted and certain stability conditions are accomplished. Similarly, a boost converter with an output filter is shown to behave as a power R-gyrator with stable dynamics.
Integral variable-structure grey control for magnetic levitation system
- Author(s): H.-K. Chiang ; C.-A. Chen ; M.-Y. Li
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- p. 809 –814 (6)
  An integral variable-structure grey control for a magnetic levitation system for position tracking is presented. The sliding-mode control is insensitive to system uncertainties and disturbances when it is within expected limits. It produces chattering when uncertainty values are overestimated, or steady-state error when underestimated. The method uses a mathematically simple and computationally efficient grey compensator for the integral variable structure controller to reduce chattering and steady-state error. The stability of this magnetic levitation system is proven by using the Lyapunov function. The experimental results verify that the proposed controller is valid for a magnetic levitation system.

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IEE Proceedings - Electric Power Applications

Volumes & issues:

Volume 153 (2006)

Volume 152 (2005)

Volume 151 (2004)

Volume 150 (2003)

Volume 149 (2002)

Volume 148 (2001)

Volume 147 (2000)

Volume 146 (1999)

Volume 145 (1998)

Volume 144 (1997)

Volume 143 (1996)

Volume 142 (1995)

Volume 141 (1994)

Latest content

Load-imposed instability and performance degradation in a regulated converter

Simplified control method for parallel-connected DC/AC inverters

Radial force density and vibration characteristics of modular permanent magnet brushless AC machine

Classification and synthesis of power gyrators

Integral variable-structure grey control for magnetic levitation system

Most viewed content for this Journal

Most cited content for this Journal