Lee, Moon G.
(Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Kusong-Dong 373-1, Yusong-Gu, Taejon 305-701, South Korea)
,
Lee, Sung Q.
(Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Kusong-Dong 373-1, Yusong-Gu, Taejon 305-701, South Korea)
,
Gweon, Dae-Gab
(Corresponding author. Tel.: +82-42-869-3265)
AbstractUsing Halbach magnet array, magnetic flux can be enhanced on one side (strong side) of the array while the flux cancelled on the other side (weak side). Inherently, rotor of rotary motor has infinite rotational length with respect to its rotation while mover of the linear motor has finite le...
AbstractUsing Halbach magnet array, magnetic flux can be enhanced on one side (strong side) of the array while the flux cancelled on the other side (weak side). Inherently, rotor of rotary motor has infinite rotational length with respect to its rotation while mover of the linear motor has finite length with respect to mover’s translation. In this paper, we propose and validate a design method. By means of the method magnetic field can be calculated theoretically. General electrical motor without slotted yoke, therefore, can be designed analytically. Using the method, the linear motor with finite mover can be designed more accurately considering the flux leakage at both end of the mover. We introduce the method in designing the linear motor with Halbach magnet array. We also investigate the difference between conventional method that does not consider the finiteness and proposed one that considers it. Using the method, the magnetic field emanated from magnet can be obtained so accurately that actuating force characteristics of the motor can be predicted more precisely. So, the method is useful in designing the linear motor.
AbstractUsing Halbach magnet array, magnetic flux can be enhanced on one side (strong side) of the array while the flux cancelled on the other side (weak side). Inherently, rotor of rotary motor has infinite rotational length with respect to its rotation while mover of the linear motor has finite length with respect to mover’s translation. In this paper, we propose and validate a design method. By means of the method magnetic field can be calculated theoretically. General electrical motor without slotted yoke, therefore, can be designed analytically. Using the method, the linear motor with finite mover can be designed more accurately considering the flux leakage at both end of the mover. We introduce the method in designing the linear motor with Halbach magnet array. We also investigate the difference between conventional method that does not consider the finiteness and proposed one that considers it. Using the method, the magnetic field emanated from magnet can be obtained so accurately that actuating force characteristics of the motor can be predicted more precisely. So, the method is useful in designing the linear motor.
10.1109/IAS.1995.530362 Ofori-Tenkorang J, Lang JH. A comparative analysis of torque production in Halbach and conventional surface-mounted permanent-magnet synchronous motors. In: Conference Proceedings IEEE IAS 30th Annual meeting, 8-12 October 1995. p. 657-63
10.1109/IAS.1993.298897 Trumper DL, Williams ME, Nguyen TH. Magnet array for synchronous machines. In: Conference Proceedings IEEE IAS 28th Annual Meeting, October 1993. p. 9-18
IEEE Trans. Industry Appl. Trumper 31 2 371 1996 10.1109/28.491486 Design and analysis framework for linear permanent-magnet machines
Jang H. The compensation of torque ripple of brushless DC motor using feed-forward method. Master thesis, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 1997. p. 4-8
Campbell 1994 Permanent magnet materials and their applications
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