A Study on Brushless DC Motor for High Torque Density

Brushless DC motor with high torque density and slim topology for easy loading for robot system is proposed and manufactured. Electromagnetic design is executed by equivalent magnetic circuit model and numerical analysis. Manufactured motor is tested and verified characteristics comparing with conventional BLDC motor.

Authors:

• Jung-Moo Seo
• Jung-Hwan Kim
• Se-Hyun Rhyu
• Jun-Hyuk Choi
• In-Soung Jung

Keywords:

• Brushless DC motor
• Robot joint module
• Torque density
• Pole/slot ratio

References:

[1] Jung-Moo Seo, Se-Hyun Rhyu, Joo-Han Kim, Jun-Hyuk Choi, In-Sung Jung, "Design of axial flux permanent magnet brushless DC motor for robot joint module," Power Electronics Conference (IPEC), pp.1336, June. 2010.
[2] N. Bianchi, S. Bolognani, and F.Luise, "Analysis and design of PM
brushless motor for high-speed operations," IEEE Trans. Energy
Convers., vol. 20, no. 3, pp. 629-637, Sep.2005.
[3] M. Markovic, Y. Perriard, "Simplified design methodology for a slotless
brushless DC motor," IEEE Trans.Magnetics, vol. 42, No. 12, Dec.2006.
[4] F. Magnussen and C. Sadarangani, "Winding factors and Joule losses of
permanent magnet machines with concentrated windings," Electric
Machines and Drives Conference,. IEMDC`03 IEEE International ., vol.
1, pp. 333, June. 2003.
[5] D. Hanselman, "Brushless Permanent Magnet Motor Design ," second
edition, The writers- collective, 2003
[6] C. Breton, J. Bartolome, J.A. Benito, G.Tassinario, I.Flotats, C.W.Lu,
B.J. Chalmers, "Influence of machine symmetry on reduction of cogging
torque in permanent-magnet brushless motors," IEEE Trans. Magnetics,
vol. 36, no. 5, pp.3819-2823, Sep. 2000