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  • Direct digital speed control system for a DC motor using a minicomputer

    Creator:
    Evans, Donald LeRoy
    Abstract:
    Direct digital control is becoming quite common in the control of industrial processes. However, due to the relatively high accuracy of both analog and conventional digital systems for controlling the speed of a dc motor, there has been a reluctance to try DDC for this purpose. This thesis describes a...
    Resource Type:
    Masters Thesis
    Full Text:
    Direct digital speed control system for a DC motor using a

  • Prediction of brushless DC drive performance considering non-sinusoidal parameter variations and asymmetrical operating conditions

    Creator:
    Spee, Rene
    Abstract:
    A highly flexible numerical simulation model for the performance prediction of brushless dc drives is presented, which is capable of investigating unbalanced and asymmetrical operating conditions as well as drives with non-ideal parameters. Numerical speed-up procedures allow for the investigation of pulse-width modulated (PWM) drives using a personal computer. Experimental...
    Resource Type:
    Dissertation
    Full Text:
    (b) Measured Phase Current (5 A/div) 24. Motor Phase Current 48 (a) Computer Prediction (b

  • Digital simulation of a self-excited cumulative compound direct-current generator with variable load

    Creator:
    Maraqa, Abdel Muti
    Abstract:
    This thesis develops a simulation model for a cumulative connected compound direct-current generator to varify the operation of this machine under conditions of slowly and rapidly changing loads. The application of this simulation method will contribute to more exact modeling of power system components. The accuracy gained is in the...
    Resource Type:
    Dissertation
    Full Text:
    direct-current generator with variable load AN ABSTRACT OF THE THESIS OF ABDEL MUTI MARAQA for the

  • Real time predictive control of generating system using hybrid computer and a fast time adaptive model

    Creator:
    Heuch, Knut
    Abstract:
    A system consisting of two d-c generators, one exiting the other, is controlled with an EAI 690 hybrid computer in an on-line operation. The hybrid computer works as a predictive controller with an on-off actuating signal. A fast-time, second-order model is used to determine the switching time, and a small...
    Resource Type:
    Masters Thesis
    Full Text:
    Serial No. Function Power Volta _e Current 3? Induction Motor ve Induction Motor d-eo Generator d-c

  • Real-time predictive voltage control of a direct-current generating system, using a hybrid computer

    Creator:
    Nehrir, Mohammad Hashem
    Abstract:
    Real-time predictive voltage control of a direct-current (d-c) generating system is achieved with the aid of a hybrid computer. Some assumptions were required to adequately simplify the simulation of the d-c generating system. A predictive controller is used to maintain the load voltage of the d-c generating system (the controlled...
    Resource Type:
    Masters Thesis
    Full Text:
    ) Title: REAL-TIME PREDICTIVE VOLTAGE CONTROL OF A DIRECT-CURRENT GENERATING SYSTEM, USING A HYBRID

  • Hardware design and protection issues in an AC/AC converter

    Creator:
    Faveluke, Alex
    Abstract:
    An AC/AC converter has been designed and implemented for the purpose of providing a modular drive system with a Brushless Doubly-Fed Machine (BDFM.) This converter is to be used in laboratory testing and also as part of a demonstration system in the field. All hardware needed to start and run...
    Resource Type:
    Masters Thesis
    Full Text:
    financial support provided by the Electric Power Research Institute, Puget Sound Power and Light, and the

  • A low cost AC motor drive for battery powered applications

    Creator:
    Wiley, Brian
    Abstract:
    Environmental concerns have renewed the interest in electric vehicles. To gain widespread use, electric vehicles will also have to offer good performance and be reasonably priced. AC drive systems using modern semiconductors can provide efficient operation at the required power levels, but their cost at present is still too high....
    Resource Type:
    Masters Thesis
    Full Text:
    HARDWARE 12 Batteries 12 Motor 13 Inverter 15 Controller 19 Current Sensors 20 Position Sensor 21 DC/DC

  • Performance and parameter prediction of large synchronous machines from physical dimensions

    Creator:
    Heberle, David D.
    Abstract:
    A project funded by the Southern California Edison (SCE) Company, Research Center of Irwindale, California, has supported the development of a performance and parameter prediction software program for use during the refurbishment of large synchronous machines, turbine generators, and synchronous condensers. The computer program was developed for SCE to allow...
    Resource Type:
    Masters Thesis
    Full Text:
    eventually led to the production of direct current by Siemens in 1855 through the invention of the shuttle