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Power Electronics and Drive Systems, 1995., Proceedings of 1995 International Conference on

Date 21-24 Feb. 1995

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Displaying Results 1 - 25 of 148
  • Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95

    Publication Year: 1995
    Request permission for commercial reuse | PDF file iconPDF (179 KB)
    Freely Available from IEEE
  • Self-commutated SVC for electric railways

    Publication Year: 1995, Page(s):732 - 737 vol.2
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The authors have developed a self-commutated static VAr compensator (SVC) to suppress voltage fluctuations in the transmission line of the Tokaido Shinkansen railway. This is the first application of self-commutated SVCs for railway systems. The SVC, which has a system capacity of 48MVA, allows the compensation of three-phase voltage unbalance in addition to power factor improvement. A high power ... View full abstract»

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  • IGBT characterisation for their protection by fuses

    Publication Year: 1995, Page(s):59 - 64 vol.1
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The case of a power IGBT can be severely damaged by high fault currents. Fast fuses can eliminate this problem. Studies and tests show that a specially designed fuse can prevent an IGBT from exploding and keep the circuit inductance below acceptable values. A thermal model is proposed in order to see how an IGBT behaves thermally during short circuits and thus to select the appropriate fuse View full abstract»

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  • A high-pulse constant frequency inverter for DC and variable frequency generation sources

    Publication Year: 1995, Page(s):358 - 363 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    There are many possible sources of DC and variable frequency AC power, yet standard commercial appliances require constant frequency AC power. This paper present an alternative inverter principle, which simplifies control hardware and reduces switching losses compared to PWM techniques, yet provides acceptable voltage and current waveforms. This is achieved by the use of reinjection techniques, wh... View full abstract»

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  • Current ripple bounds in interleaved DC-DC power converters

    Publication Year: 1995, Page(s):738 - 743 vol.2
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    In distributed power supply systems, the parallelism of DC-DC power converters is a basic architecture. In this paper, the authors use the time domain method to show that the amplitude of the input/output current ripple of N(⩾1) parallelly interleaved modules is always upper bounded by that of the individual modules for buck, boost, flyback, Cuk, and SEPIC power converters if the phase shift a... View full abstract»

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  • Microprocessor based PWM inverter with third harmonic injection

    Publication Year: 1995, Page(s):555 - 559 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    The use of a microprocessor system the MC68020, to generate a real PWM scheme to control a three-phase voltage source inverter based on the asymmetric regular sampling technique is described. One of the shortcomings of this scheme, which is the limitation placed on the fundamental voltage that cannot exceed 50% of the input DC voltage at unity depth of modulation, is partially avoided by the injec... View full abstract»

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  • Analytical approach to analysis of steady-state processes in a single phase cycloconvertor

    Publication Year: 1995, Page(s):152 - 154 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    A new analytical method for the analysis of steady-state processes in single-phase cycloconverters has been developed. The z-transform is used to derive the equation governing the cycloconverter's current. An analytical solution of the problem is obtained. Physical experiments have been carried out to verify the results obtained. Good agreement between theoretical and experimental results is obser... View full abstract»

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  • Comparison of different methods of trajectory calculation for an industrial robot

    Publication Year: 1995, Page(s):449 - 453 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    A fast robot position control scheme with a sensor has been developed, which is completely based on a transputer network. This approach was made by interfacing each transputer directly to its associated drive. Different methods of trajectory calculation for a robot are compared. The rise of the acceleration follows a sine-square function, sinusoidal function, a block function and exponential funct... View full abstract»

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  • Safe operation of IGBTs in switching converters

    Publication Year: 1995, Page(s):65 - 70 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    IGBTs are fast replacing other devices in all industrial power control systems up to the hundreds of kW range. The IGBT has been considered as an efficient controllable switch which combines the advantages of both MOS and bipolar technologies. However, in order to ensure safe and reliable operation of the IGBT in actual circuit applications, numerous device aspects must be taken into account durin... View full abstract»

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  • DSP controlled power converter

    Publication Year: 1995, Page(s):364 - 369 vol.1
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A digital controller is designed and implemented by a digital signal processor (DSP) to replace the PWM and error amplifier compensation network in a two wheeler forward power converter. The DSP controller is designed using three approaches: (a) discretization of analog controller-the design is based on the transfer function of the error amplifier compensation network; (b) digital PID controller d... View full abstract»

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  • Self organising fuzzy controller for CSI fed induction motor

    Publication Year: 1995, Page(s):744 - 748 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    A self organising fuzzy controller is applied to the closed loop speed control system of an induction motor fed from an auto sequential current source inverter. The induction motor is controlled to operate in constant flux mode. The scaling factors of input to the controller and output are altered to modify the speed response. For obtaining better steady state response, nested control windows of a... View full abstract»

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  • A single phase parallel power processing scheme with power factor control

    Publication Year: 1995, Page(s):40 - 47 vol.1
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    With the enforcement of the agency standards such as IEC-555-2 for the harmonic components of the input line current, conventional single phase AC/DC power converters with rectifier-capacitor type input interface can no longer be used in switch mode power supplies except for power levels below 75 W. As a result, several alternative AC/DC converters, called power factor corrected (PFC) converters, ... View full abstract»

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  • A pulse pump controller for frequency-locked stepping position servo control system

    Publication Year: 1995, Page(s):616 - 621 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A frequency-locked stepping position servo system using a pulse pump controller (PPC) is presented. The proposed microprocessor-based PPC can adaptively generate a motion profile for a position locking system according to the periodically sampled position error. The slope-varied characteristic of the PPC can speed up the positioning response for long distance servo control. A system model is built... View full abstract»

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  • A novel PWM scheme for harmonic reduction in power converters

    Publication Year: 1995, Page(s):560 - 564 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    The harmonic content in the output of the rectifier can be reduced by employing pulse-width modulation. Sinusoidal pulse-width modulation (SPWM) is commonly used to reduce the harmonic content in the output and to vary the average voltage. However, the SPWM technique gives a large second harmonic component in the output and a low fundamental output voltage. The paper describes a novel PWM scheme c... View full abstract»

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  • Analysis, design and performance of magnetic couplings

    Publication Year: 1995, Page(s):634 - 638 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    The paper presents a critical review of existing design methods for magnetic couplings. Based on the analysis and design optimisation, a prototype synchronous type coupling is built and tested. The experimental performance is compared with theoretical performance and the agreement is quite good View full abstract»

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  • Robust chattering free sliding mode control of servo drives

    Publication Year: 1995, Page(s):202 - 207 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A new discrete-time control algorithm has been developed by combining variable structure systems (VSS) and Lyapunov design. It possesses all the good properties of the sliding mode control and avoids the unnecessary discontinuity of the control input, thus eliminating chattering which has been considered as a serious obstacle for applications of VSS. A unified control approach for the stator curre... View full abstract»

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  • Permanent magnet motor for EV

    Publication Year: 1995, Page(s):792 - 796 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Recently, in the midst of controversies concerning environmental problems and the necessity diversification, electric vehicles (EV) have been in the limelight for their features of environmental preservation, high energy efficiency, and, above all, high effectiveness in promoting the leveling of daily electric power loads. The EV under development by the authors use conventional 1500 [cc] class di... View full abstract»

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  • Design considerations for economical electronic ballasts

    Publication Year: 1995, Page(s):411 - 416 vol.1
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Electronic ballasts generating high frequency supply are being widely used for fluorescent lighting applications to reduce the power consumption of the circuit, improve lamp efficacy, eliminate flicker and provide instant start. Lighting represents quite a substantial amount of energy consumed and thus the technology of electronic ballasts is receiving wide acceptance. However, in order to compete... View full abstract»

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  • Simplification of transfer function in switching converter with general load impedance

    Publication Year: 1995, Page(s):155 - 161 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    Conventionally the small-signal characteristics of switching DC-DC converters have usually been analyzed on the assumption that the load is a pure resistance mainly for analytical simplicity. However, in many cases an actual load is not necessarily a pure resistance. This paper presents a simplified transfer function of duty ratio to output voltage of the forward switching converter with a general... View full abstract»

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  • Performance of power diode model for circuit simulation

    Publication Year: 1995, Page(s):519 - 524 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Accurate simulation of power electronic circuits involving power diodes requires mathematically-based power diode models to describe the forward recovery and reverse recovery characteristics realistically. Performance of practical implementations of a proposed model in widely-used versions of SPICE by hard-coding and by using user-defined controlled sources are presented with experimental data. Th... View full abstract»

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  • Performance evaluation of an emitter switched thyristor for resonant converter applications

    Publication Year: 1995, Page(s):13 - 15 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    This paper reports on the static and dynamic switching characteristics of an emitter switched thyristor (EST) for resonant power converter applications. Two-dimensional (2-D) mixed device and circuit simulations were used to study the carrier switching dynamics. It is shown that during turn-on, the EST has better performance than an IGBT with significantly enhanced drift region conductivity modula... View full abstract»

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  • Using computer simulation and robust design techniques to improve production yield [of electronic circuits]

    Publication Year: 1995, Page(s):454 - 460 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    This paper outlines the use of new tools in the design of electronic circuits. The techniques are illustrated using simple circuits. Simulation of these circuits is done with Saber software. The aim of the simulation is, apart from circuit performance evaluation, the identification of components which have a critical influence on the circuit performance and whose tolerance spread could have advers... View full abstract»

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  • Performance of harmonic current injection scheme applied to three phase bridge rectifiers

    Publication Year: 1995, Page(s):587 - 592 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    A scheme is described for reducing the harmonics associated with 3 phase 6-pulse bridge rectifiers using harmonic current injection. The performance of the new scheme is examined with fixed filters and varying load current for both controlled and uncontrolled bridge rectifiers View full abstract»

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  • Position and speed estimation of sensorless synchronous reluctance motor

    Publication Year: 1995, Page(s):844 - 849 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This paper presents a new technique of estimating both rotor position and speed of an ideal synchronous reluctance machine using only the measurements of current and voltage available at the stator terminals. Due to the variation in inductance with position, this technique is applicable even at standstill and no special startup procedure is required. The simulation results have shown the viability... View full abstract»

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  • Vector control of synchronous permanent magnet motors including stator iron loss

    Publication Year: 1995, Page(s):309 - 314 vol.1
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    To achieve the high-performance speed control of synchronous permanent magnet motors (PM motors), the influence of iron loss cannot be neglected as the driving frequency increases with high-speed operation. This paper presents a voltage equation and the vector control of PM motors including stator iron loss. The stator iron loss is introduced as an equivalent iron loss resistance in voltage equati... View full abstract»

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