Design of large-power surface-mounted permanent-magnet motors using postassembly magnetization

Min Fu Hsieh, You Chiuan Hsu, David G. Dorrell

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


This paper reports the design process for the manufacture of higher-power rare-earth permanent-magnet (PM) motors using postassembly magnetization. Difficulties can be encountered in production using normal manufacturing processes due to the high intensity of rare-earth magnets that are premagnetized. Postassembly magnetization utilizes the stator windings of a PM motor to magnetize the magnets after assembly. With this method, some parameters, such as slot-fill factor, number of turns, wire diameter, etc., must be considered for the magnetization and motor operation. In this paper, a design process that incorporates the design considerations for postassembly magnetization (for complete magnetization) together with the design requirements is described for successful motor operation. A 6-kW surface-mounted PM (SPM) motor is designed using the proposed process as a demonstration, which is verified using finite-element analysis. Another 400-W SPM motor is also designed for experimental purpose. The experimental results validate the effectiveness of the proposed method.

Original languageEnglish
Article number5373910
Pages (from-to)3376-3384
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Issue number10
Publication statusPublished - 2010 Oct

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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