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Dissertations / Theses on the topic 'Fractional motor'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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1

Grop, Henrik. "Investigation of AC electrical machine stators with fractional conductor windings." Licentiate thesis, KTH, School of Electrical Engineering (EES), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12472.

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<p>Industry always searches the least expensive solution for a machine design. Therefore, there is a need for integrating different customer ordered machines within the same frame, while keeping the foundation of the mechanical design constant. Since the winding design in electrical machines is essential for the performance and relatively inexpensive to adapt, it can be used to meet different customer demands. This thesis investigates the foundations of a special winding named fractional conductor winding. An expression for winding factors for certain kinds of these windings is developed. Calc
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2

LI, ZIJIAN. "FRACTIONAL-SLOT CONCENTRATED-WINDING SURFACE-MOUNTED PERMANENT MAGNET MOTOR DESIGN AND ANALYSIS FOR IN-WHEEL APPLICATION." Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2497418.

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The study on the driving cycle and powertrain of electric vehicle presents the conclusion that there is a regular working area on efficiency map where electric motor works for the most time. Thus, two motivations are proposed: first, to evaluate the efficiency map of electric motor analytically, second, to design an electric motor whose maximum efficiency area on efficiency map covers its regular working area. To evaluate motor efficiency map, three tasks have to be completed: calculating torque-speed characteristic, calculating losses, studying on motor control strategy. For in-wheel applica
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3

Asadullah, Siddiqui Makhdoomzada. "Theoretical investigations of stator iron losses in a 15 MW induction motor equipped with fractional conductor windings." Thesis, KTH, Elektrisk energiomvandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53696.

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Iron loss calculation in AC machines has aroused great interest over the years, in an attempt to make electrical machines more efficient. However, different iron loss models yield different results for the same machine, owing to their individual limitations. This element of uncertainty associated with obtained values is further enhanced in cases where knowledge of the flux density’s behavior is very elementary.  This thesis gives an overview of different iron loss models and applies them to a 15 MW induction motor equipped with fractional conductor winding. The aim is to analyze the results ac
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4

Bednařík, Václav. "Výpočet optimálního skluzového kmitočtu asynchronního motoru pro minimalizaci ztrát." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220924.

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This master’s thesis focuses on the minimisation of losses by calculation of optimum slip frequency of induction motor. The next point of this master‘s thesis is supersaturation. Supersaturation must be solved for the size of losses, because of the effect that is cause of the losses, when current increases with saturation. However current is not increase proportionally with increasing saturation, but increases several times more. This problem is included in the calculation of the slip frequency. Optimum of slip frequency is solve for modified gamma model of induction machine. In the main point
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5

Zahrn, Frederick Craig. "Studies of inventory control and capacity planning with multiple sources." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29736.

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Thesis (Ph.D)--Industrial and Systems Engineering, Georgia Institute of Technology, 2010.<br>Committee Co-Chair: John H. Vande Vate; Committee Co-Chair: Shi-Jie Deng; Committee Member: Anton J. Kleywegt; Committee Member: Hayriye Ayhan; Committee Member: Mark E. Ferguson. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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6

Donaghy-Spargo, Christopher Michael. "Synchronous reluctance motors with fractional slot-concentrated windings." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3486.

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Today, high efficiency and high torque density electrical machines are a growing research interest and machines that contain no permanent magnet material are increasingly sought. Despite the lack of interest over the last twenty years, the permanent magnet-free synchronous reluctance machine is undergoing a revival and has become a research focus due to its magnet-free construction, high efficiency and robustness. They are now considered a potential future technology for future industrial variable speed drive applications and even electric vehicles. This thesis presents for the first time a sy
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7

Retana, Hernández Roberto Carlos. "Diagnostics methods for armature faults in fractional horsepower commutator motors /." München : Verl. Dr. Hut, 2009. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=018707871&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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8

Hardin, John Wesley. "Quantification of soluble organic fraction measurement variation in diesel particulate matter emissions." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=6007.

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Thesis (M.S.)--West Virginia University, 2008.<br>Title from document title page. Document formatted into pages; contains ix, 135 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 52-53).
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9

Kaltani, Arian. "Traitement de la fraction fine des résidus du broyage d'automobiles (R. B. A. )." Vandoeuvre-les-Nancy, INPL, 1994. http://docnum.univ-lorraine.fr/public/INPL_T_1994_KALTANI_A.pdf.

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Aujourd’hui, sur le poids total d'un véhicule, on sait recycler 70% sous forme de ferrailles et 5% sous forme de métaux non ferreux. L’enjeu porte donc sur les 25% restant (RBA), actuellement mis en décharge et principalement représentés par des matières plastiques, caoutchoucs, verres, bois, mousse, etc. La tache est énorme puisque le parc annuel des voitures à recycler compte plus que 1,8 million d'unités. Le traitement des RBA et en particulier de la partie fine (< 15 mm), généralement non-traitée et qui représente une grande partie de la mise en décharge, est le but primordial de la présen
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10

Lin, Jun-Hong, and 林峻弘. "Fuzzy Fractional PID Controller for DC Motor." Thesis, 2017. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22105CYCU5442045%22.&searchmode=basic.

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碩士<br>中原大學<br>電機工程研究所<br>105<br>This thesis introduces a new technology for the speed control of DC servo motor based on fractional-order proportional, integral and derivative (PID) control and fuzzy logic control. A new kind of PID controller, fractional-order PID controller, is proposed for controlling a DC servo motor. It is used not only for fractional-order systems but also for integer-order systems, and may have some superior performances compared with the classical integer-order PID controller. The computing method of fractional calculus is used to construct the fuzzy fractional PID con
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11

Hua-Ying, Pu, and 卜華穎. "Induction Motor Fault Diagnosis Based on Discrete Fractional Fourier Transform." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/53882566444177834026.

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碩士<br>國立勤益科技大學<br>電機工程系<br>103<br>This study focuses on the fault diagnosis of a defective 3-phase induction motor. The vibration signals are measured and used to determine whether there is a fault and what type of the fault it is. For the consideration of the faults commonly encountered in the field, 5 defective models are pre-built, including broken rotor bar, hollow rotor bar, damage to outer ring of bearing, damage to inner ring of bearing, and damage to ball bearing. The vibration signals are first pre-processed to minimize the impact of noises and preserve vital characteristics. Discrete
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12

Lin, Guo Hua, and 林國樺. "Chaos synchronization and chaos control for integral and fractional order motor system." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/61819050763287905974.

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碩士<br>國立交通大學<br>機械工程系所<br>93<br>ABSTRACT In this thesis, synchronization by linear feedback control and adaptive control via a system variable, and global synchronization of three coupled chaotic systems with ring connection are achieved, and using conception of Pecoro and Carroll for complete, lag and anticipated synchronization are applied in BLDCM system. The generalized complete, lag and anticipated synchronization is presented in this thesis. In general, the chaotic behavior is found in nonlinear autonomous systems with order 3, in this thesis, we presented that chaos exists in the fract
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13

Liao, Guan Wei, and 廖冠瑋. "Design of Robust Fractional Order PID Controller for Vector-Controlled Induction Motor Drives." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/16498544564762173564.

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碩士<br>長庚大學<br>電機工程學研究所<br>96<br>The main propose of this thesis is to design a robust fractional-order PID speed controller for vector-controlled induction motors, where possible parameter variations, load disturbance and model uncertainties are considered. The required parameters of the fractional-order PID controller can be obtained by utilizing Matlab optimization toolbox, in which phase margin, gain crossover frequency, high-frequency noise and low-frequency disturbance rejection are performance of concern. In the analysis and design of robustness, an equivalent rational model of fractiona
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14

SYU, JHIH-SIANG, and 許智翔. "Design and Analysis of a Fractional-Slot Concentrated Surface Permanent Magnet Brushless Motor for Electric Vehicle Applications." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/83499425490622349056.

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碩士<br>逢甲大學<br>電機工程學系<br>104<br>This thesis describes the design and analysis of a 14-pole/12-slot fractional-slot concentrated winding surface permanent magnet motor for electric vehicle applications to satisfy the torque-speed operating range against the New European Driving Cycle (NEDC) and thermal constraints. The specifications of the motor is three-phase, 5 kW at a rated speed of 1350 rpm. The prototype design of the motor is done with the aid of magnetic circuit design software, SPEED, and electromagnetic field analysis based on finite element method software, Flux2D. Results from this s
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15

Shih, Hsiu-Peng, and 石修鵬. "Manufacturing of a Fractional Horsepower Single Phase Permanent Split Capacitor Eddy-current Motor with System Parameter Identification." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/99390461847993396506.

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碩士<br>中興大學<br>電機工程學系所<br>95<br>In this research, we fabricate a permanent split capacitor (PSC) eddy-current motor by insetting an eddy-current induction rotor into the stator of a fractional horsepower single phase induction motor. The mathematical model, and hence the equivalent circuit, is established by using the Double Revolving-Field Theory. For system parameter identification, both no-load test and block-rotor test are conducted with measurements of the rotor speed, stator voltage, line current, power factor, and power input. With the test data and the circuit model, we can further refi
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16

Ho, Ming-Te, and 何明特. "Design Considerations for Fractional-Slot Permanent Magnet Synchronous Motors." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/56594844591695839229.

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碩士<br>逢甲大學<br>電機工程所<br>97<br>This paper deals with the design of an interior permanent magnet (IPM) synchronous motor for use in electric power steering system. Such an application requires the motor having small volume, high efficiency and low torque ripple. First, three IPM synchronous motor configurations are analyzed and compared. One of them is chosen based on the performance requirement. Second, to enhance the motor performance and reduce the magnet volume, the Taguchi method coupled with the finite element analysis is performed. Finally, the heat transfer analysis of the motor is also c
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17

Chen, Hung Chih, and 陳宏志. "Design and Implementation of Fractional-Order Integral Sliding-mode Flux Observer for Vector-Controlled Induction Motors." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/67707910651238858440.

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碩士<br>長庚大學<br>電機工程學系<br>98<br>This thesis, based on a direct vector-controlled induction motor, mainly presents a fractional-order integral sliding-mode (FOISM) flux observer. In general, the control performance of direct vector-controlled induction motors relies on accurate flux estimation. However, due to the variations of electrical parameters, the accuracy of estimated fluxes will be affected under different operational environments. Moreover, the associated speed and flux responses will be degraded. In this thesis, the errors of estimated currents will be used to compensate the flux estim
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