Determining the Air Gap Length of an Axial Flux Wound Rotor Synchronous Generator

Authors

Abdul Multi, Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, IndonesiaFollow
Iwa Garniwa, Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia
Uno Bintang Sudibyo, Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia

Abstract

The air gap length of the designed axial flux wound rotor (AFWR) synchronous generator is determined properly according to the design parameters. One of the distinct advantages of an axial flux (AF) machine is its adjustable air gap. An AF generator’s performance might be controlled by adjusting its air gap. The designed generator has a smallscale capacity that has 1 kW, 380 V, and 50 Hz. The windings are laid into slots made from laminated core. The slots are carved in the face of the stator and rotors. The generator has a single-double-sided slotted wound stator sandwiched between twin rotors. The effect of air gap changes on its performance can be seen from the calculation results using the given equations. The results reveal electric quantities suited to the machine’s effective performance. The smaller the air gap, the greater the efficiency and power factor and the smaller the armature current and voltage. The efficiency and armature current for 0.1 cm air gap are 85.30 % and 1.815 A, respectively.

Bahasa Abstract

Penentuan Lebar Celah Udara Generator Sinkron Fluks Aksial Rotor Belitan. Lebar celah udara generator sinkron fluks aksial rotor belitan (AFWR) perlu ditentukan dengan tepat sesuai dengan parameter desain. Salah satu kelebihan dari mesin fluks aksial (AF) adalah celah udaranya yang dapat diatur. Kinerja generator AF dapat diatur dengan mengatur celah udaranya. Generator yang dirancang merupakan mesin berkapasitas skala kecil yang memiliki 1 kW, 380 V, dan 50 Hz. Belitan-belitannya diletakkan didalam alur yang terbuat dari inti besi laminasi. Alur-alurnya terletak pada permukaan stator dan rotor. Generator tersebut memiliki satu stator belitan beralur dua sisi yang terletak diantara dua rotor. Pengaruh perubahan celah udara terhadap kinerjanya dapat dilihat dari hasil perhitungan dengan menggunakan persamaan-persamaan tertentu. Hasilnya menunjukkan besaran listrik yang sesuai dengan kinerja efektif mesin. Semakin kecil celah udara, semakin besar efisiensi dan faktor daya sedangkan arus armatur dan tegangannya semakin kecil. Efisiensi dan arus armatur pada celah udara 0,1 cm masing-masing adalah 85,30% dan 1,815 A

References

1. M. Aydin, S. Huang, T. A. Lipo, Wisconsin Electric Machines & Power Electronics Consortium, University of Wisconsin-Madison, Madison, Research Report 2004-10, 2004.
2. A. Parviainen, Ph.D Thesis, Lappeenranta University of Technology, Digipaino, Finland, 2005, p.17.
3. J.R. Bumby, R. Martin, 12th International Stirling Engine Conference, Durham, 2005.
4. J.F. Gieras, R.-J. Wang, M.J. Kamper, Kluwer Academic Publishers, London, 2004, p.131.
5. J.F. Gieras, Advancements in Electric Machines, Springer, Bydgoszcz, 2008, p.122.
6. J.F. Gieras, Permanent Magnet Motor Technology: Design and Applications, Third Edition, CRC Press, New York, 2009, p.321.
7. W.Y. Jo, I.J. Lee, Y.H. Cho, D.H. Koo, Y.D. Chun, J. Electrical Eng. & Tech. 2/1 (2007) 61.
8. A. Mahmoudi, N.A. Rahim, H.W. Ping, Prog. Electromagn. Res. B. 33 (2011) 383.
9. S. Asghar-Gholamian, M. Ardebili, K. Abbaszadeh, S. Akbar-Gholamian, Int. J. Softw. Eng. Appl. 2/3 (2011) 87.
10. A.K. Sawhney, A Course in Electrical Machine Design, Dhanpat Ray & Co. (P) Ltd, Delhi, 2005, p.774.
11. J.P. ¨Onen, T. Jokinen, V.E. Hrabovcov´A, Design of Rotating Electrical Machines, John Wiley & Sons, New Delhi, 2008, p.460.
12. S.A. Gholamian, M.T.A. Ablouie, A. Mohseni, S.E. Jafarabadi, J. Appl. Sci. Res. 5/9 (2009) 1230.
13. Y. Chen, Proceeding of Industry Applications Conference, 2005. Fourtieth IAS Annual Meeting. Conference Record, vol. 1, 2005.
14. A. Chen, R. Nilssen, A. Nysveen, IEEE Trans. Ind. Appl. 46/2 (2010) 780.

Recommended Citation

Multi, Abdul; Garniwa, Iwa; and Sudibyo, Uno Bintang (2013) "Determining the Air Gap Length of an Axial Flux Wound Rotor Synchronous Generator," Makara Journal of Technology: Vol. 17: Iss. 2, Article 8.
DOI: 10.7454/mst.v17i2.1952
Available at: https://scholarhub.ui.ac.id/mjt/vol17/iss2/8