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 20 of 464 for “"Reluctance"”.
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DC Reluctance Machine — A Doubly-Salient Reluctance Machine with Controlled Electrical and Mechanical Power Ripple
Doubly-Salient Reluctance Machines (DSRMs) sidestep many of the issues with permanent magnet and induction machines and embody the lowest cost and simplest manufacturing of the motor technologies. Major drawbacks to RMs have been (1) the need for failure-prone electrolytic capacitors, (2) large …
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Bipolar excitation of switched reluctance machines
"In recent years, the switched reluctance machine (SRM) has become a prominent electromechanical device and is seriously considered as a candidate for such diverse areas as: aerospace, vehicular technology, home appliances, and military applications. The resurgence of the SRM has primarily been the …
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A Reluctance Actuator Gap Disturbance Testbed
We have designed and built a Reluctance Actuator Gap Disturbance Testbed. The testbed emulates the short stroke and long stroke interaction of modern lithography stages. The testbed can be used to impart gap disturbance of the order of 10[mu]m to a target platten thereby providing a gap disturbance …
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Switched brushless doubly-fed reluctance machine drive
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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A Queer Reluctance to Seek Medical Treatment
This study explores whether queer people wait longer than non-queer people to seek professional medical care in the wake of an illness or injury. Little scholarship has evaluated queer people's pursuit of palliative medical care. An online survey was distributed to Virginia Tech students aged 18-30 …
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Design of Switched Reluctance Motor for Circular Economy
L'abstract è presente nell'allegato / the abstract is in the attachment
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High-performance torque control of switched reluctance motor
… speed ripples at low speed operation. Switched Reluctance Motor (SRM) produces excessive torque ripples due to discrete excitation of phase windings and its non-linear magnetization characteristics. A new polynomial model in phase current and rotor position is developed for representing SRM …
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Linearly-acting variable-reluctance generator for thermoacoustic applications
… heater. In this work, a linearly-acting variable-reluctance generator (VRG) is developed to act as a high-frequency (250 Hz) electro-acoustic transducer and extract electric power from a proposed thermoacoustic engine design. A computational model of the thermoacoustic engine was developed using …
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Computer aided design of a switched reluctance motor
… method is presented for the design of a switched reluctance motor.
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Control of Switched Reluctance Motors Considering Mutual Inductance
… to improve the performance of the Switched Reluctance Motor (SRM) drive. By exciting two adjacent phases instead of single phase, the changing rate and the magnitude of the phase currents are much reduced. Therefore the existing problems caused by the single-phase excitation such as large …
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Electronic rotor position sensing of switched reluctance motor
The Switched Reluctance Motor (hereafter referred to as SRM) requires rotor position information for successful operation. The rotor position, in the present day, is obtained through a mechanical/electrical sensor mounted on the rotor shaft. These transducers are expensive and take additional space …
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Design of Switched Reluctance Motors and Development of a Universal Controller for Switched Reluctance and Permanent Magnet Brushless DC Motor Drives
Switched Reluctance Machines (SRMs) are receiving significant attention from industries in the last decade. They are extremely inexpensive, reliable and weigh less than other machines of comparable power outputs. Although the design principles of the machine are available as a concatenation of many …
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Practical indirect position sensing for a variable reluctance motor
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1987.
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A microprocessor control scheme for switched reluctance motor drives
… control scheme for variable speed switched reluctance motor(SRM) drives is discussed. A particular implementation derived from first principles of the SRM is presented. The Intel 8088 microprocessor is used for the design implementation. It is shown that given the control requirements of the …
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Nonlinear Deadbeat Current Control of a Switched Reluctance Motor
… is critical to the success of the switched reluctance motor (SRM). Yet high motor phase nonlinearities in the SRM place extra burden on the current controller, rendering it the weakest link in SRM control. In contrast to linear motor control techniques that respond to current error, the …
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Position Sensorless Implementation for a Linear Switched Reluctance Machine
… position estimator for a 4.8 m Linear Switched Reluctance Machine (LSRM) with minimal modifications to the transducer-based controller is investigated for the first time in this study. LSRMs require position feedback for closed-loop control but present a low cost, high energy efficiency …
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