Journal
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Volume 52, Issue 6, Pages 4789-4797Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIA.2016.2600649
Keywords
Airspace barriers; manufacturability; spoke-type interior permanent magnet (IPM); staggered method; unipolar leakage flux
Funding
- Guangdong Welling Motor Manufacturing Co., Ltd.
- Guangdong Innovative Research Team Program, China [2011N084]
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This paper proposes a spoke-type interior permanent magnet (IPM) machine with novel alternate airspace barriers, through which higher torque capability and better manufacturability can be obtained, without remarkable deterioration in mechanical strength. Further, the influence of end leakage flux in the novel IPM design is investigated by three-dimensional finite element method, including the leakage flux characteristics and torque capability. Furthermore, a step-staggered rotor is proposed to reduce the unipolar leakage flux and magnetization of the end shaft. As an extension, unipolar leakage flux is further investigated in consequent-pole PM machines, as well as the validity of step-staggered method. Finally, prototypes are fabricated and tested to verify the foregoing analyses, including the magnetic field at the end shaft and the output capability.
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