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Electric Power Applications, IEE Proceedings B

Issue 4 • Date Jul 1990

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Displaying Results 1 - 12 of 12
  • Tubular linear induction motor for use as a servo actuator

    Publication Year: 1990 , Page(s): 273 - 280
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (540 KB)  

    The authors describe the theory of a tubular linear induction motor (TLIM). The properties of this motor, with its high speed and low moving mass, make it attractive to use as a servo motor for linear mechanical movements. A laboratory built TLIM is analysed using the complex phasor method, giving a starting point for the design of a control strategy in the transient mode, while from this analysis... View full abstract»

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  • Dynamic flux controlled AC drive

    Publication Year: 1990 , Page(s): 259 - 264
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (468 KB)  

    A dynamic flux controlled drive for a cage induction motor uses a technique called `phase-decoupling' to improve significantly the transient response of a scalar-controlled drive while retaining all the inherent advantages of the method. The strategy requires a versatile PWM modulator, but it is applicable to a wide variety of applications, achieving a transient performance surpassing most other t... View full abstract»

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  • Dynamic performance analysis of reluctance motors using damping and synchronising torques

    Publication Year: 1990 , Page(s): 231 - 238
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (552 KB)  

    The authors analyse the dynamic performance of polyphase reluctance motors using damping and synchronising torques. A numerical algorithm has been applied to obtain these torque components in the time domain using detailed nonlinear models of reluctance motors. The effects of all electrical motor parameters have been examined and the optimum values of parameters, which give maximum damping of hunt... View full abstract»

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  • Series connected PWM GTO current/source convertor with symmetrical phase angle control

    Publication Year: 1990 , Page(s): 205 - 212
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (616 KB)  

    A series connected pulse width modulated current-source convertor (CSC) with symmetrical phase angle control, employing gate turnoff thyristors, is investigated for high voltage applications, where the sinusoidally modulated pulse width is kept sufficiently large to suppress the harmonics by employing a constant modulation index. It should be appreciated that in this system the power flow can be e... View full abstract»

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  • Compound, series, axial flux induction machines: single phase analogy

    Publication Year: 1990 , Page(s): 265 - 272
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (560 KB)  

    The characteristics of the single phase analogy of a pair of axial flux, polyphase induction motors having their respective stator windings and also their magnetic circuits in series, with provision for `out of balance' flux, arising due to differences in the two rotor speeds, to pass through a saturating magnetic shunt are investigated. Theoretical and experimental results show that when such a p... View full abstract»

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  • Implicit rotor position sensing using search coils for a self-commutating permanent magnet drive system

    Publication Year: 1990 , Page(s): 253 - 258
    Cited by:  Papers (3)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (472 KB)  

    A novel form of rotor position sensing is described that makes use of a simple search coil system in a permanent magnetic machine. It can be used for almost any field configuration and permanent magnet material provided that there is a reluctance variation between the direct and quadrature axes. Practical results are presented for a particular rotor configuration. A closed-loop speed control syste... View full abstract»

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  • Oscillating synchronous linear motor in electromechanical resonance

    Publication Year: 1990 , Page(s): 281 - 292
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (992 KB)  

    The symmetric double acting oscillating synchronous linear motor with longitudinal functional air gaps is very well suited to the system synthesis of the electronically controlled drive for working resonant machines used in industrial vibrational techniques. It can be designed for a stroke of up to a few centimetres and a working frequency ranging from about 6 to 70 Hz. What is important in practi... View full abstract»

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  • Analysis of power electronic circuits with feedback control: a general approach

    Publication Year: 1990 , Page(s): 213 - 222
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (744 KB)  

    An algorithm that is suitable for the development of general purpose simulation software for power electronic circuits is presented. The circuits can be arbitrarily configured and can incorporate feedback controls. The method of analysis uses an efficient nodal approach that allows the device switchings to be easily monitored. The basic nodal formulation, including the method used to monitor devic... View full abstract»

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  • Computer-aided selection of variable-reluctance stepping motors

    Publication Year: 1990 , Page(s): 223 - 230
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (668 KB)  

    The authors describe an interactive computer procedure for the selection of motor and power circuit parameters in variable-reluctance stepping motor systems. A system of prioritising aspects of the target performance provides an extremely flexible approach and ensures that the procedure can be used to specify either a complete system or just one component of the system. The versatility of the proc... View full abstract»

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  • Harmonic analysis of space vector modulated PWM waveforms

    Publication Year: 1990 , Page(s): 197 - 204
    Cited by:  Papers (8)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (528 KB)  

    While most traditional PWM inverters use the asymmetrical regularly sampled triangulation technique to generate waveforms, a recently reported space vector PWM method is rapidly gaining favour in the industrial drives arena as an alternative technique. The paper presents an analysis of the space vector PWM waveform to obtain its spectrum. The analysis is based on a novel decomposition technique, i... View full abstract»

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  • Novel technique for the optimal online control of a PWM voltage/source inverter

    Publication Year: 1990 , Page(s): 248 - 252
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (368 KB)  

    A new technique for the online identification of a communication pattern allowing harmonic loss minimisation in a PWM voltage/source inverter is presented. A control strategy based on it is developed and simulation results are included to demonstrate the feasibility of the proposed method View full abstract»

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  • Direct phase modelling of synchronous generators

    Publication Year: 1990 , Page(s): 239 - 247
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (620 KB)  

    Accurate nonlinear modelling of the synchronous generator in the dqo reference frame has been well documented. To extend the analysis to a wider range of loading conditions, the generator is modelled in the abc reference frame. The unsaturated static and dynamic saturated inductances of the machine in this reference frame are obtained using conventional dqo-abc transformation techniques. A new set... View full abstract»

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