期刊
IEEE ACCESS
卷 9, 期 -, 页码 65721-65729出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3070747
关键词
Demagnetization; Permanent magnet motors; Reluctance motors; Magnetic flux; AC motors; Brushless motors; Magnetic cores; Brushless AC motor; spoke-type interior permanent magnet motor; NdFeB magnet; irreversible demagnetization; demagnetization rate; armature reaction
资金
- Technology Development Program of MSS [S2958204]
- Honam University
This study introduces an optimal design for a spoke-type interior permanent magnet (IPM) motor that minimizes PM weight by allowing irreversible demagnetization. The design process effectively reduces the PM weight by 23.7% compared to the initial design model while maintaining similar efficiency.
In this study, we introduce an optimal design for a spoke-type interior permanent magnet (IPM) motor that can minimize PM weight by allowing irreversible demagnetization, unlike the conventional motor design method that does not allow irreversible demagnetization. The spoke-type rotor structure has the advantage of concentrating the magnetic flux around the rotor core. However, part of the PM near the surface of the stator tooth becomes sensitive to the armature reaction and external magnetic factors. Therefore, typical spoke-type rotor construction follows a limited design process that does not allow irreversible demagnetization. Although the manufacturing process allows tolerance for the demagnetization rate, motor design without considering the demagnetization rate in all the design stages becomes a design constraint and limits the performance area. In this study, the performance improvement is examined, when irreversible PM demagnetization is allowed up to -3%, and is not zero. For optimal design, Latin hypercube sampling (LHS), the kriging model, and genetic algorithm (GA) are utilized. With the proposed design process, motors are effectively designed to reduce the PM weight by 23.7%, compared to the initial design model while maintaining an efficiency almost similar to that of the initial design model.
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