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Filtering by: Subject Variable speed drives Remove constraint Subject: Variable speed drives Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • The doubly-excited generator and its utilization in a variable-speed generating system

    Creator:
    Agha-Mirsalim, Mojtaba
    Abstract:
    The doubly-excited machine can be used as a variablespeed generator or as a variable-speed-drive motor. In this thesis the focus is on the aspects associated with generating electric power (real and reactive) from erratic energy resources such as water or wind. In such cases, the power input to the prime...
    Resource Type:
    Dissertation
    Full Text:
    generator or as a variable-speed-drive motor. In this thesis the focus is on the aspects associated with

  • Voltage controller for a variable speed generation system

    Creator:
    Weigand, Claus H.
    Abstract:
    An important task of a Variable Speed Generation (VSG) system is the capability to maintain and control the terminal voltage at some desired value as determined by the reactive power dispatch strategy.The main objective is to design a sub-optimal fixed-parameter controller in the sense that constraints with respect to practical...
    Resource Type:
    Masters Thesis
    Full Text:
    Voltage controller for a variable speed generation system

  • Supervisory control of a doubly-fed machine

    Creator:
    Werahera, Priya N.
    Abstract:
    An EMCON-D distributed process controller is evaluated for control and monitoring of an experimental doubly-fed machine system. A closed-loop control circuit is implemented to operate the doubly-fed machine with constant rotor current. A standard PID algorithm as well as an algorithm tailored to the doubly-fed machine are evaluated.
    Resource Type:
    Masters Thesis
    Full Text:
    Control System 5 2.2 Host Computer 6 3.1 Variable Speed Drive Setup for the Doubly-fed 14 Machine 3.2

  • Investigation and mitigation of the adverse effects of PWM adjustable speed drives

    Creator:
    Zhang, Haoran
    Abstract:
    With the introduction of high speed semiconductor power devices and the increased application of adjustable speed drives (ASDs) for efficient speed control of ac motors, there has been a growing number of costly motor-drive related process failures. It has been found that the high dv/dt and high switching frequency have...
    Resource Type:
    Dissertation
    Full Text:
    adjustable speed drive (ASD) system employing a 2-level inverter 4 1.2. Conventional inverter output

  • A DSP controlled multi-level inverter providing DC-link voltage balancing, ride-through enhancement and common-mode voltage elimination

    Creator:
    Dai, Shaoan
    Abstract:
    With the development of high performance power electronic and semiconductor technologies, Adjustable Speed Drive (ASD) systems are increasingly applied in residential, commercial and industrial applications. Due to the advantages at higher power ratings, the three-level Neutral-Point-Clamped (NPC) Voltage Source Inverter (VSI) is being employed in industrial and traction applications, static...
    Resource Type:
    Dissertation
    Full Text:
    electronic and semiconductor technologies, Adjustable Speed Drive (ASD) systems are increasingly applied in

  • Design procedure for brushless doubly-fed machine used as a limited speed-range pump drive

    Creator:
    Alajmi, Abdulhadi M.
    Abstract:
    The continuing desire of industry to further improve process efficiency, through tighter control and energy conservation, has prompted users to pay closer attention to Adjustable Speed Drives (ASDs). The conventional ASDs consist of induction or synchronous motors controlled by power electronic controllers through the adjustment of supply frequency and line...
    Resource Type:
    Masters Thesis
    Full Text:
    a Limited Speed-Range Pump Drive AN ABSTRACT OF THE THESIS OF Abdulhadi M. Alaimi for the degree

  • Voltage sag and momentary interruption ride-through for adjustable speed drives

    Creator:
    van Zyl, Annabelle
    Abstract:
    The awareness of electric power quality has increased over the past decade as electronic equipment has become more susceptible to power disturbances. The most disruptive power disturbances are voltage sags and momentary interruptions and their effect on adjustable speed drives (ASDs) is studied in this thesis. Several solutions have been...
    Resource Type:
    Dissertation
    Full Text:
    compensation 47 32. Definition of symbols used in Table 6. 49 33. Adjustable speed drive with passive

  • Analysis and design of the brushless doubly-fed machine

    Creator:
    Rochelle, Patrick R.
    Abstract:
    Use of conventional induction machines (IM) in adjustable speed drives (ASD) has increased in recent years. Electronic power processing has facilitated this increased use. The IM is an inexpensive and robust machine, but when used as part of an ASD, the cost of the system increases due to the inclusion...
    Resource Type:
    Masters Thesis
    Full Text:
    Induction Machine 2 Adjustable Speed Drive System. Figure 1.2. Cascaded Induction Machine Speed 3 Control

  • A new and improved control of a power electronic converter for stabilizing a variable speed generation system using an embedded microcontroller

    Creator:
    Venkatswamy, Suresh
    Abstract:
    A new and improved stabilizer was developed for the variable speed generation (VSG) system. The VSG system exhibits periodic oscillations which sometimes leads to a loss of synchronism. After careful study, a simple but effective strategy to stabilize the system was implemented with real time digital feedback control. The VSG...
    Resource Type:
    Masters Thesis
    Full Text:
    for stabilizing a variable speed generation system using an embedded microcontroller AN ABSTRACT OF

  • Passively controlled variable-speed generator system

    Creator:
    Bathon, Tobias Siegfried
    Abstract:
    This thesis presents both an analysis and simulations of a passively controlled variable-speed generator system, which can be applied for renewable energy sources such as wind turbines. Parallel connected passive/external resistors and inductors are connected to the slip rings of a wound rotor induction machine to provide an acceptable speed...
    Resource Type:
    Masters Thesis
    Full Text:
    Passively controlled variable-speed generator system AN