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 21 for “"Synchronous motors"”.
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Failure monitoring in small permanent-magnet synchronous motors
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1991.
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Analysis of Large Synchronous Motors Used In Hydro Pump Storage Plants.
… several computer programs for analysis of large synchronous motors used in hydro pump storage plants. First, a mathematical model of the power system and the pump motor is developed and the results presented. Next, the effect a synchronous condenser has on the starting voltage dip is …
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Permanent-magnet synchronous motors and associated power electronics for direct-drive vehicle propulsion
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Prediction of the power losses of PWM inverter drives for permanent magnet synchronous motors
… threephase IGBT inverter drive for synchronous motor applications. For a given set of motor parameters, semiconductor device parameters and motor operating conditions, the various losses and the temperature rises of semiconductor junction can be predicted. All parameter values, …
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Benefits of angularly-controlled field switching on the pulling-into-step ability of salient-pole synchronous motors
Thesis: Sc. D., Massachusetts Institute of Technology. Department of Electrical Engineering, 1931
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Permanent Magnet Synchronous Motors: Nonlinear Dynamic Modeling, Hardware Characterization, and High-Bandwidth Torque Control for Applications in Dynamic Robotics
… covers the physical model of a Permanent Magnet Synchronous Motors (PMSM), a very common type of actuator in dynamic robotics. This thesis details the derivation of the PMSM linear model, how to adapt the model dependent on the physical construction of a real motor, and the implementation of …
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Direct Power Control of AC Motors
… of direct power control (DPC) of induction motors (IMs) and permanent magnet synchronous motors (PMSMs) fed by a voltage source inverter have been studied. Three different approaches of DPC for IMs and one for PMSMs are proposed and investigated. They are: (a) direct output power and flux …
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Polar Field Oriented Control with 3rd Harmonic Injection
… method for controlling Permanent-Magnet Synchronous Motors (PMSM) and induction motors. Almost invariably the orientation of the stator and rotor (field) fluxes are described in rectangular coordinates. In this thesis we explore the practicality of using polar coordinates.</p> <p>Third …
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Analysis of an energy efficient permanent magnet brushless universal motor
… PM universal motor, i.e. a combination of a PM synchronous and a PM brushless direct current (DC) motor. The PM universal motor has the capability to operate as a variable speed DC shunt motor with high torque at low speeds, and also as a synchronous motor at constant speed with high efficiency. …
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A direct-drive linear actuated assistive robot for the shoulder
… these robots utilise heavy and bulky industrial motors and often require a complicated mechanism to provide the required motion for the patient’s shoulder. Therefore, the majority of these robots are stationary and are unable to provide a meaningful task-specific rehabilitation. To increase the …
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New Optimal High Efficiency Dsp-based Digital Controller Design For Super High-speed Permanent Magnet Synchronous Motor
… design for super high-speed permanent magnet synchronous motors (PMSM). The PMSMs are a key component for the miniaturic cryocooler that is currently under development at the University of Central Florida with support from NASA Kennedy Space Center and the Florida Solar Energy Center. Advanced …
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Field oriented control of permanent magnet synchronous motor with third-harmonic injection pulse width modulation to reduce quadrotors’ speed ripples
… as enabled by the use and precise control of motors. Traditional Direct Current (DC) motors are replaced by permanent magnet synchronous motors (PMSM) associated with the new power electronic inverters. Because of a PMSM’s higher power density than a DC motor, it reduces the rotor losses, thus …
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Design and prototyping methods for brushless motors and motor control
… methods for custom brushless permanent magnet synchronous motors are explored. Three case-study motors are used to develop, illustrate and validate the methods. Two 500W hub motors are implemented in a direct-drive electric scooter. The third case study, a 10kW axial flux motor, is used to …
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Design, analysis and implementation of a spoke-type motor with high-performance ferrite magnets for electric vehicle applications
… the past decades, rare-earth permanent magnet motors have been widely used in high-power applications such as electric vehicle propulsion motors due to their high energy density and efficiency. However, the high cost, unstable supply, and small reserves of rare-earth materials make the …
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Super High-speed Miniaturized Permanent Magnet Synchronous Motor
… is concerned with the design of permanent magnet synchronous motors (PMSM) to operate at super-high speed with high efficiency. The designed and fabricated PMSM was successfully tested to run upto 210,000 rpm The designed PMSM has 2000 W shaft output power at 200,000 rpm and at the cryogenic …
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Design and development of a traction motor emulator using a three-phase bidirectional buck-boost AC-DC converter
… DC-bus-configured emulator, two permanent magnet synchronous motors (PMSM) of 7.5 kW and 2.0 kW are emulated and their simulation and experimental results are presented here. The proposed bi-directional converter inspired from classical buck-boost operation, requires just ten unidirectional IGBT …
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Control of a High-speed (<50,000 rpm) Interior Permanent Magnet Synchronous Motor
High-speed interior permanent magnet synchronous motors (HS-IPMSMs) play a critical role in modern industrial and automotive applications, yet their performance is often constrained by losses, parameter variations, and deadtime effects. This thesis investigates advanced field-oriented control (FOC) …
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A Brushless DC Motor Drive Without a DC Link Capacitor
… drives, Brushless DC (BLDC) and Permanent Magnet Synchronous (PMS) motors have become popular as energy efficient and reliable alternatives for induction motors. Both BLDC and permanent magnet synchronous motors are electronically commutated based on the position of the rotor by using voltage …
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Linear iron-core permanent magnet motor with high force and low acoustic noise
… electric machines including variable-reluctance motors, induction machines, and permanent magnet synchronous motors. The severity of this problem depends on the types of motors and their applications. One exemplary case where the vibro-acoustic noise becomes especially detrimental is iron-core …
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New Sensorless Permanent Magnet Synchronous Motor Drive
In permanent magnet synchronous motor (PMSM) drives, magnetic-saliency-based techniques have been widely used to detect rotor position and speed, especially during the starting and low-speed operations. Among these techniques, pulsating high-frequency signal injection (PHFSI) stands out as a …
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