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Analysis of a Line Start Novel Synch...

Mokwana, Tlhokaboyo Innocentia.

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Analysis of a Line Start Novel Synchronous Reluctance Motor with Sinusoidal Rotor Shape.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Analysis of a Line Start Novel Synchronous Reluctance Motor with Sinusoidal Rotor Shape./
作者:	Mokwana, Tlhokaboyo Innocentia.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	94 p.
附註:	Source: Masters Abstracts International, Volume: 84-04.
Contained By:	Masters Abstracts International84-04.
標題:	Design optimization. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29356158
ISBN:	9798352603819

Analysis of a Line Start Novel Synchronous Reluctance Motor with Sinusoidal Rotor Shape.
Mokwana, Tlhokaboyo Innocentia.

Analysis of a Line Start Novel Synchronous Reluctance Motor with Sinusoidal Rotor Shape. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 94 p.

Source: Masters Abstracts International, Volume: 84-04.

Thesis (M.E.)--University of Johannesburg (South Africa), 2020.

This dissertation focuses on the transient and dynamic analysis of the line-start novel synchronous reluctance motor (SynRM) with a sinusoidal rotor shape.The line-starting capability of the novel SynRM is achieved by inserting brass bars in the flux barriers on the d-axis and in the iron laminations close to the airgap on the q-axis, and the bars are short-circuited by brass end rings. The brass used for both bar and end ring are made up of copper, zinc and tin to prevent dezincification on numerous conditions.The thin brass bars has pleasant force,upper resistance to atmospheric and water corrosion,and good electrical power.The mathematical model that illustrates on the dynamic behaviour of the novel SynRM with brass rotor bars was developed in both machine variables and arbitrary rotating frame to establish the relation between different quatities. To analyse the effects that the different quantities in the dynamic model have on the machine's electromagnetic performace, the 3-Dimension (3-D) Finite Element Method (FEM) was used to design and model the novel SynRM with brass rotor bars.A 3-D Finite Element Analysis (FEA) model was executed for the non-linear AC magnetic transient solution to analyze the transient execution of the proposed motor.The FEA results of the novel SynRM with brass rotor bars are in contrast with those ones of the conventional SynRM with brass rotor bars having similar stator frame, stator winding configuration and flux barrier design variables, and operating under the same conditions. The FEA results evidence that the low rotor inertia of the novel SynRM with brass rotor bars contributes to quick transient responses where transient current and rotor mass torque are concerned. The reluctance torque has been seen to provide a positive impact on the acceleration of the torque for the novel SynRM with brass bars cage rotor. The crawling effects arenoted in the FEA results. These effects which are caused by parasitic torque are more pronounced in the conventional SynRM than in the novel SynRM.Furthermore, the novel SynRM has a high steady-state average torque and low torque ripple contents as compared to the conventional SynRM.The anisotropic sinusoidal shape of the rotor of the novel SynRM plays an important role in migitating some torgue harmonics,which lead to the high torque ripples in the conventional SynRM with brass rotor bar.To validate the results obtained from numerical method, the prototypes of the novel and conventional SynRMs have been tested for transient and dynamic behaviour. The measured results show that the Novel SynRM has a better starting torque in contrast with conventional SynRM. Although the acceleration time of Novel SynRM is noted to be long, but the motor has developed high steady-state average torque and smooth accelerating torque in contrast with the conventional SynRM. The measured results show a good correlation with the FEA results.

ISBN: 9798352603819Subjects--Topical Terms:

3681984
Design optimization.

Analysis of a Line Start Novel Synchronous Reluctance Motor with Sinusoidal Rotor Shape.
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245 1 0 $a Analysis of a Line Start Novel Synchronous Reluctance Motor with Sinusoidal Rotor Shape.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 94 p.
500 $a Source: Masters Abstracts International, Volume: 84-04.
500 $a Advisor: Muteba, Mbika.
502 $a Thesis (M.E.)--University of Johannesburg (South Africa), 2020.
520 $a This dissertation focuses on the transient and dynamic analysis of the line-start novel synchronous reluctance motor (SynRM) with a sinusoidal rotor shape.The line-starting capability of the novel SynRM is achieved by inserting brass bars in the flux barriers on the d-axis and in the iron laminations close to the airgap on the q-axis, and the bars are short-circuited by brass end rings. The brass used for both bar and end ring are made up of copper, zinc and tin to prevent dezincification on numerous conditions.The thin brass bars has pleasant force,upper resistance to atmospheric and water corrosion,and good electrical power.The mathematical model that illustrates on the dynamic behaviour of the novel SynRM with brass rotor bars was developed in both machine variables and arbitrary rotating frame to establish the relation between different quatities. To analyse the effects that the different quantities in the dynamic model have on the machine's electromagnetic performace, the 3-Dimension (3-D) Finite Element Method (FEM) was used to design and model the novel SynRM with brass rotor bars.A 3-D Finite Element Analysis (FEA) model was executed for the non-linear AC magnetic transient solution to analyze the transient execution of the proposed motor.The FEA results of the novel SynRM with brass rotor bars are in contrast with those ones of the conventional SynRM with brass rotor bars having similar stator frame, stator winding configuration and flux barrier design variables, and operating under the same conditions. The FEA results evidence that the low rotor inertia of the novel SynRM with brass rotor bars contributes to quick transient responses where transient current and rotor mass torque are concerned. The reluctance torque has been seen to provide a positive impact on the acceleration of the torque for the novel SynRM with brass bars cage rotor. The crawling effects arenoted in the FEA results. These effects which are caused by parasitic torque are more pronounced in the conventional SynRM than in the novel SynRM.Furthermore, the novel SynRM has a high steady-state average torque and low torque ripple contents as compared to the conventional SynRM.The anisotropic sinusoidal shape of the rotor of the novel SynRM plays an important role in migitating some torgue harmonics,which lead to the high torque ripples in the conventional SynRM with brass rotor bar.To validate the results obtained from numerical method, the prototypes of the novel and conventional SynRMs have been tested for transient and dynamic behaviour. The measured results show that the Novel SynRM has a better starting torque in contrast with conventional SynRM. Although the acceleration time of Novel SynRM is noted to be long, but the motor has developed high steady-state average torque and smooth accelerating torque in contrast with the conventional SynRM. The measured results show a good correlation with the FEA results.
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650 4 $a Design specifications. $3 3683440
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650 4 $a Finite element analysis. $3 3554062
650 4 $a Mathematical models. $3 522882
650 4 $a Geometry. $3 517251
650 4 $a Magnetic fields. $3 660770
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