Magnetic Field of a Tubular Linear Motor With Special Permanent Magnet

Li, Liyi; Huang, Xuzhen; Pan, Donghua; Cao, Jiwei

doi:10.1109/tps.2010.2057519

Cited by 37 publications

(12 citation statements)

References 4 publications

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“…To overcome the big leakage flux and low utilization of the secondary iron for the motor with the rectangular pole, a similar V-shaped pole structure was proposed [7], as shown in Fig. 5.…”

Section: Magnetic Concentrating Of the Similar V-shaped Polementioning

confidence: 99%

Design and analysis of the secondary structure for the slot-less tubular permanent magnet linear synchronous motor

Huang

Wang

et al. 2014

2014 17th International Symposium on Electromagnetic Launch Technology

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This paper focuses on the secondary structure of the slotless tubular permanent magnet linear synchronous motor (TPMLSM). The leakage flux and the magnetic field distribution of the secondary of the motor with the rectangle pole were analyzed firstly. To decrease the big leakage on the axis and improve the usage rate of the iron, the similar V-shaped and U-shaped poles were provided. Finite-element method was obtained to analyze the leakage flux on the non-magnetic axis and in the air-gap. Based on this, the magnetic concentrating characteristic of the new pole was summarized. Besides, the strengthening characteristic was also revealed by analyzing the flux density in the mechanical air-gap and in the slot-less winding for the U-shaped pole. Finally, the key parameters of the similar U-shaped pole were optimized and researched.

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“…To overcome the big leakage flux and low utilization of the secondary iron for the motor with the rectangular pole, a similar V-shaped pole structure was proposed [7], as shown in Fig. 5.…”

Section: Magnetic Concentrating Of the Similar V-shaped Polementioning

confidence: 99%

Design and analysis of the secondary structure for the slot-less tubular permanent magnet linear synchronous motor

Huang

Wang

et al. 2014

2014 17th International Symposium on Electromagnetic Launch Technology

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“…1. Although tubular actuators with specially magnetised PMs, proposed in [16][17][18][19], produce a higher air-gap flux density, the PMs are always difficult to be manufactured in such a tubular structure. Moreover, it also needs to be emphasised that the SPM structure may be superior to IPM in some cases since the reluctance force caused by the salient-pole structure of the IPM will block the motion.…”

Section: Introductionmentioning

confidence: 99%

Semi‐interior permanent‐magnet actuators for high‐magnet‐utilisation and low‐cost applications

Luo

Sun

2018

IET Electric Power Applications

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Generally, for small-and medium-sized tubular permanent-magnet (PM) linear actuators, PM structures can be divided into two categories. One is interior PM (IPM) structure and the other is surface-mounted PM (SPM), involving a compromise between flux per pole and magnet leakage flux. This study proposes a novel semi-IPM (s-IPM) structure for a tubular linear actuator having the advantages of high flux per pole of IPM and small magnet leakage flux of SPM. The air-gap flux density and the average thrust are analysed and compared with IPM and SPM by the magnetic equivalent circuit and finite element analysis. Moreover, the s-IPM structure is also compared with Halbach PM array in terms of the average thrust and the magnet utilisation. Four prototype actuators with different PM structures are built and tested. Both the theoretical and experimental results show that the magnet utilisation of the s-IPM structure is the largest while its cost and volume are approximately unchanged. The proposed s-IPM actuators are of great prominence in high-magnet-utilisation and low-cost applications.

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“…In recent years, permanent magnet linear motors have been more and more used in applications showing a significant advantage in terms of efficiency, thrust control, position accuracy, and reliability. Rare-earth magnets, such as SmCo or NdFeB magnets, improve the performance of the permanent magnet linear motor drives, making slotless motors interesting solutions [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%