Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Scalar Control"”.
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Analysis of volts per hertz scalar control as governor of high pole count, high frequency, permanent magnet synchronous machine
The student, Katherine O'Kane, accepted the attached license on 2017-04-20 at 11:04.
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Controle de motor de indução de média tensão em aplicação de bombeio submarino
This work presents a study of sensorless speed control by field orientation considering the use of a three-phase induction motor fed through long cables through subsea umbilicals. For this study, the adopted electrical model reproduces a system that is used to drive a subsea pump in offshore oil …
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Speed sensorless field oriented control of ac induction motor using model reference adaptive system
In order implement the vector control technique, the motor speed information is required. Incremental encoder, resolvers and tachogenerator, are used to reveal the speed. These sensors require careful mounting and alignment and special attention is required with electrical noises. Sensorless speed …
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Investigation of Control Concepts for High-Speed Induction Machine Drives and Grid Side Pulse-Width Modulation Voltage Source Converters
Control of a low voltage ac/dc/ac converter for high-speed induction machine drive applications has been investigated. Such a configuration can be applied, for example, in microturbines and high-speed spindles. Scalar control is usually applied for the control of high-speed drives especially in the …
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High performance induction machine control: Methods, limits and solutions
… various high performance induction machine control methods and provides methods for improved performance. Parameter sensitivity analyses on the discussed control methods are given. Practitioners have reported performance degradation during high speed DTC operation, including excessive torque …
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Robust and Adaptive Nonlinear Control of Limit Cycle Oscillations in UAVs Using Synthetic Jet Actuators
… as utter, cause significant challenges in fight control of unmanned aerial vehicles (UAVs), and could potentially lead to structural damage and catastrophic failures. LCO can be described as vibrational motions in the pitching and plunging displacements of an aircraft wing. Even in low Reynolds …
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Robust Control Methods for Nonlinear Systems with Uncertain Dynamics and Unknown Control Direction
<p>Robust nonlinear control design strategies using sliding mode control (SMC) and integral SMC (ISMC) are developed, which are capable of achieving reliable and accurate tracking control for systems containing dynamic uncertainty, unmodeled disturbances, and actuator anomalies that result in an …
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Searching for the ideal river? New directions in geographical geomorphology
… headwaters of the Yellow River as a key cross-scalar control on the contemporary river, sketching the outlines of a place-based approach to understanding relationships between form and process in the region. Inspired by conversations with colleagues during fieldwork on the Qinghai-Tibetan …
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Bit-Stream Control of Doubly Fed Induction Generators
… (GSC). The RSC and GSC require separate vector control systems. Traditionally, these control systems are implemented using microcontrollers, which perform the required control functions sequentially. As the complexity of control algorithms increases to achieve improved functionality and the time …