[논문]Detent Force Reduction of a Tubular Linear Generator Using an Axial Stepped Permanent Magnet Structure

Eid Ahmad M.; Lee Hyun-Woo; Nakaoka Mutsuo

Detent Force Reduction of a Tubular Linear Generator Using an Axial Stepped Permanent Magnet Structure 원문보기

Journal of power electronics, v.6 no.4, 2006년, pp.290 - 297

Eid Ahmad M. (Dept. of Electrical Eng., Kyungnam University) , Lee Hyun-Woo (Dept. of Electrical Eng., Kyungnam University) , Nakaoka Mutsuo (Dept. of Electrical Eng., Kyungnam University)

Abstract ▼ AI-Helper

Various methods have been discussed to reduce detent force in a tubular permanent magnet type linear single phase AC generator. In particular, the proposed methods depend on variations of the permanent magnet construction. These methods include two approaches in the form of sloped magnets, and conical magnets in addition to the conventional method of optimizing the magnet length. The undesired detent force ripples were calculated by a two dimensional Finite Element Method (FEM). Moreover, the generated electromotive force in the stator coils was calculated for each configuration of the permanent magnet. The experimental results agreed well with those obtained from the FEM-based simulations. Sufficient reduction in the detent force was achieved over the range of 40% while the root mean square of the output voltage was maintained. It was found that sloping the permanent magnet decreased the detent force and at the same time increased the generated rms voltage of the AC generator. The performance of the designed linear AC generator was evaluated in terms of its efficiency, total weight, losses, and power to weight ratio.

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가설 설정

The root mean square (rms) AC voltage of the emf is calculated for each case of the PM length and is plotted in Fig. 3. When the PM length is reduced, the flux linking the stator coils will change rapidly during the motion of the PM across the coils. Thus the rms voltage increases in accordance with the decreasing PM length.

제안 방법

The PM-LG is simulated under load conditions to calculate the generator performance while the armature reaction effect is taken into consideration. At first, the only source in the design is the PMs, After moving the translator a complete period, and collecting the flux linkage for each stator coil, the internal back-generated emf is calculated. From the simple equivalent circuit, the load current can be calculated.
In this paper, a two-dimensional finite element method has been introduced to analyze a tubular linear permanent magnet single-phase synchronous AC generator. Special permanent magnet constructions in the form of half sloped, full sloped and conical PMs were analyzed. Their effects on the detent force and the induced voltage were investigated.
The performance of the designed linear AC generator was evaluated in terms of its efficiency, total weight, losses, and power to weight ratio. A repetitive routine was adopted to take the armature reaction effect on the generated output voltage.
Three different methods are presented in this paper to reduce the detent force in TL-PM single-phase synchronous generators. These methods include the effect of the PM length and the other two methods depend on changing the construction of the PM shape, which are sloped and conical.

이론/모형

By solving the above equations in the finite region of the problem, the field values can be obtained. The detent force at any position of the translator is calculated using the Maxwell Stress Tensor Method ⑺. The governing equation of the detent force is represented as:

참고문헌 (11)

W. M. Arshad, 'A low-leakage linear transverse-flux machine for a free-piston generator', Ph. D. thesis, Royal Institute of technology, Stockholm, Sweden, 2003
J. F. Eastham, 'Novel synchronous machines: linear and disc', Proc. Inst. Elect. Eng., vol. B-137, 1990
M. Watada, K. Yanashima, Y. Oishi, and D. Ebihara, 'Improvement on characteristics of linear oscillatory actuator for artificial hearts', IEEE Trans. Magn., vol. 29, pp. 3361-3363, 1993

상세보기
K.-C. Lim, J.-P. Hong and G.-T. Kim, 'The novel technique considering slot effect by equivalent magnetizing current', IEEE Trans. Magn., Vol. 35, No. 5, pp. 3691-3693, 1999

상세보기
K.-C. Lim, J.-K. Woo, G.-H. Kang, J.-P. Hong and G.-T. Kim, 'Detent force minimization techniques in permanent magnet linear synchronous motors', IEEE Trans. Magn., Vol. 38, No. 2, pp. 1157-1160, 2002

상세보기
Ju Lee, H. W. Lee, Y. D. Chun, M. Sunwoo, and J. P. Hong, 'The performance prediction of controlled PM LSM in various design schemes by FEM', IEEE Trans. Magn., Vol. 36, No. 4, pp. 1902-1905, 2000

상세보기
A. Benhama, A. C. Williamson, and A. B. J. Reece, 'Force and torque computation from 2-D and 3-D finite element field solutions', IEE Proc.-Electr. Power Appl., Vol. 146, No. 1, pp. 25-31, 1999

상세보기
H. Arof, Ahmad M. Eid and K. M. Nor, 'Cogging force reduction using special magnet design for tubular permanent magnet linear generators', 39th International Universities Power Engineering Conference (UPEC'2004), pp. 523 527, Vol. (2), 6-8 September 2004, Bristol, UK
Ahmad M. Eid, Sung-Jun Kim, Hyun-Woo Lee and Mutsuo Nakaoka, 'Tubular Permanent Magnet Linear Synchronous Generator Design For Linear Engine Applications', The Korean Institute of Electrical Engineers, Electrical Machinery and Energy Conversion System Society (KIEE-EMECS) Autumn Annual Conference 2005, pp. 17-19, October 20-22, 2005, Gwangju, Korea
Ahmad Eid, Kang-Ju Sung, Choi Seok Won, Han Ho Dong, H.W. Lee and M. Nakaoka, 'Cogging force minimization using stepped permanent magnets in linear generators', 2005 Korea Wind Energy Association (KWEA) General Meeting and International Symposium, pp. 188-196, December 9-10, 2005, Jun Ju, Korea
W. R. Cawthorne, 'Optimization of a brushless permanent magnet linear alternator for use with a linear internal combustion engine', Ph. D. West Virginia University, USA, 1999

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