| Title |
Effect of Magnetization Pattern on Partial Demagnetization of Rotary Electric Machines with Ferrite Magnets |
| Authors |
김관호(Kim, Kwan-Ho) ; 박형일(Park, Hyung-Il) ; 유대준(You, Dae-Joon) ; 장석명(Jang, Seok-Myeong) ; 최장영(Choi, Jang-Young) |
| DOI |
https://doi.org/10.5370/KIEE.2015.64.12.1679 |
| Keywords |
Demagnetization ; Ferrite magnet ; PM machine ; Halbach array |
| Abstract |
This paper examines the effect of the magnetization pattern on the partial demagnetization of a permanent magnet (PM) machine that uses a ferrite magnet. Although the use of halbach-magnetized PM (HMPM) arrays in PM machines has been dramatically increasing because of their attractive features, the demagnetization characteristics of HMPM arrays have not yet been examined. In this study, two analyses of the demagnetization characteristics of HMPM arrays and parallel magnetized PMs (PMPMs) are performed, with the demagnetization characteristics being analyzed using a finite element method. According to our results, partial demagnetization occurred dramatically in the HMPM arrays. Thus, it is important to consider the vulnerability of HMPM arrays when designing PM machines. |