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 73 for “"Armature"”.
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The In-between: Armature for Inhabitation
… of creating a threshold, architecture as armature and parasitic structures.
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Armature: Infill, A Health Care Facility in Verón, Dominican Republic
The purpose of this book is to explore the idea of duration of physical architectural elements, and how their relative permanence or temporariness affects time and memory. This project takes on the program of a healthcare facility in the community of Verón located in the Dominican Republic. Through …
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Impact of armature rewinding on induction motor efficiency in South Africa
… aim of this thesis is to evaluate the impact of armature rewinding on the efficiency of Low Voltage (LV) industrial squirrel cage induction motors in South Africa. The efficiency of an electric motor is a measure of the effectiveness of the motor to convert electrical power at its terminals to …
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Design of an air gap armature for the MIT superconduting generator
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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A modified Gramme-Ring armature for a high voltage superconducting alternator.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1973. M.S.
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Design and construction of an armature for an alternator with a superconducting field winding.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1971. Ph.D.
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Insulation considerations and qualifications for form-wound air-core armature windings in high-frequency electrical machines
High specific power electrical machines are a key enabling technology in hybrid electric aircraft. Specific power can be increased by increasing the machine's electrical loading and operating frequency, which often increases the machine's operating temperature and requires a strong insulation …
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A velocity regulated DC motor driven by an armature rectifier: effects of shaft twist and backlash
… thesis shows a simplified representation for an armature rectifier driving a DC motor load. This representation was obtained from the nonlinear equations relating the output current of the armature rectifier into the DC motor as a function of the input control variable for continuous and …
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The design and construction of a modified gramme-ring armature for a generator with a superconducting field winding
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Induction Motors With Rotor Helical Motion
Performance analysis of the twin-armature rotary-linear induction motor, a type of motor with two degrees of mechanical freedom, is the subject of this dissertation. The stator consists of a rotary armature and linear armature placed aside one another. Both armatures have a common rotor which can …
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A direct current differential relay
… This mmf will set up a flux in the core and armature of a relay which forms a magnetic circuit about the supplying conductors. Since the armature of the relay is balanced on a knife edge, the force of attraction between core and armature which is caused by the flux passing from one to the …
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Shock wave interactions at explosive/metallic interfaces
… changes in an expanding metal cylinder (the armature of a flux-compression generator) as part of the explosive-driven generator study. In this study, premature longitudinal cracks characteristically developed in the outer surface of the armature tubing at a much smaller expansion ratio than …
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Development of a spring-less RF MEMS switch
… MEMS switch with a mechanically unrestrained armature, over a RF transmitting coplanar waveguide. Electrostatic actuation is used during the switching operation. The attractive force from the electrostatic field is generated by a pair of the actuation electrodes on both sides of the armature, …
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A new structure of 12Slot-10Pole field-excitation flux switching synchronous machine for hybrid electric vehicles
… parts of the field excitation coil (FEC) and the armature coil is located in the stator, used for hybrid electric vehicles (HEVs). Design of the new structure different from the previous design which no permanent magnets. For a high-speed motor applications together with the system coupled with …
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Development of a new single-phase field excitation flux switching motor topology with segmental rotor
… weight. Meanwhile, overlap windings between armature and Field Excitation Coil (FEC) have caused the problems of high end coil increased size of motor and high copper losses. Therefore, a new topology of singlephase non-overlap windings 12S-6P FEFSM segmented rotor with the advantages of less …
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AC loss in MgB2-based fully superconducting electric machines
… components are superconducting while the ac armature coils are normal copper conductors. A fully superconducting machine would involve both superconducting field and armature components for higher specific power, though this would introduce the previously mentioned ac losses. This research …
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Design of a small fast steering mirror for airborne and aerospace applications
… compared with heritage systems. The moving armature is supported with a combination of elastomer sheets and active position control. Local angular and mirror-normal displacement is sensed with integrated capacitive sensors. Analysis content includes specification of performance requirements …
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Modellazione dell’instabilità laterale delle barre di armatura nelle pile da ponti in cemento armato
… spesso l’instabilità delle barre di armature porta allo schiacciamento del nucleo degli elementi e quindi al collasso strutturale. In letteratura sono presenti modelli atti a simulare l’instabilità delle armature, ma spesso questi non tengono conto della presenza del ricoprimento e …
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Fundamental Study and Development of a Hydrogen Pellet Accelerator Using a Fuseless Two-Stage Plasma-Arc-Driven Electromagnetic Railgun
… by means of a coupling piece, and a plasma-arc armature is created from the propellant gas by means of a very unique, fuseless, arc-initiation scheme. A slightly different, yet equally effective fuseless arc-initiation scheme was employed in a prototype room-temperature two-stage railgun system. …
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