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Development of single-phase external rotor induction motor for ceiling fan application

Development of single-phase external rotor induction motor for ceiling fan application / Choy Sook Kuan
Kipas siling menerima permintaan tinggi di pasaran kerana ianya lebih jimat tenaga dan mesra alam berbanding dengan penghawa dingin. Dalam usaha peramalan dan peningkatan prestasi motor kipas siling yang disediakan oleh pengilang, penyelidikan dijalankan untuk membangunkan model matematik menggunakan teori medan pusingan berganda. Motor direka bentuk dan dimodel menggunakan perisian unsur terhingga Opera 2D. Reka bentuk utama motor memberi tumpuan kepada ketebalan sela udara, di mana parameter pemegun dan pemutar kekal malar. Faktor kuasa motor aruhan semakin baik apabila ketebalan sela udara adalah kecil. Sela udara yang lebih kecil juga mengurangkan kebocoran fluks. Ini meningkatkan tork keluaran dan kecekapan motor. Menukar kekutuban penggulungan utama dan tambahan juga memberi kesan terhadap prestasi motor dalam aspek kuasa input dan tork. Parameter-parameter motor aruhan fasa tunggal dapat dianggar menggunakan ujian DC, ujian pemutar disekat dan ujian tanpa beban. Dari ujian-ujian ini, profil tork-kelajuan motor dapat diramal dan diplot. Pengaturcaraan Matlab digunakan untuk mengira parameter-parameter motor dan plot profil tork-kelajuan pada slip yang berbeza, s. Kesan nilai kapasitan yang berbeza terhadap profil tork-kelajuan juga diramalkan. Apabila nilai kapasitan dinaikan, tork daripada motor aruhan fasa tunggal juga meningkat. Apabila kapasitor dikeluarkan, profil tork-kelajuan menunjukkan graf dengan sifar tork permulaan pada slip, s = 1.Ini adalah kerana 90 ° anjakan fasa antara penggulungan utama dan tambahan tidak dapat dihasilkan. _______________________________________________________________________________________________________ Ceiling fan receives high demand in market as it is more energy-efficient and environmental friendly compared to air conditioner. In order to predict and improve the performance of ceiling fan motor provided by the manufacturer, research is done to develop mathematical model using double revolving field theory. Motor is designed and modelled using Opera 2D finite element software. The main design of the motor focuses on the air gap thickness, where other parameters of stator and rotor are assumed to be constant. The smaller the air gap thickness, the better is the power factor of the induction motor. Smaller air gap thickness also allows less flux leakage. This enhances the output torque and efficiency of the motor. Changing the winding polarity of the main and auxiliary winding also affects the performance of motor in the aspects of motor input power and torque. Parameters of single-phase induction motor are estimated using DC test, blocked-rotor test and no-load test. From these tests, torque-speed profile of the motor is predicted and plotted. Matlab programming is used to calculate motor parameters and to plot the torque-speed profile of the motor at different slip, s. Effect of different capacitance values on the torque-speed profile is also predicted. When the capacitance value increases, the starting torque and the breakdown torque of the single-phase induction motor also increases. When capacitor is removed, the torque-speed profile shows a graph with zero starting torque at slip, s=1 as 90° phase displacement between the auxiliary winding current and main winding current is not produced.
Contributor(s):
Choy Sook Kuan - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875007998
Language:
English
Subject Keywords:
fan; energy-efficient; friendly
First presented to the public:
6/1/2015
Original Publication Date:
3/21/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 115
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-03-21 16:24:53.076
Submitter:
Mohd Jasnizam Mohd Salleh

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