Study on Process Derivation and Characteristic Analysis for BLDC Motor Design Using Dual Rotor Structure with High Torque Density

Byeong-Chul Lee, Cheon-Ho Song, Do-Hyun Kim and Ki-Chan Kim
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Byeong-Chul Lee: Department of Electrical Engineering, Hanbat National University, Daejeon 34158, Korea
Cheon-Ho Song: Department of Electrical Engineering, Hanbat National University, Daejeon 34158, Korea
Do-Hyun Kim: Department of Electrical Engineering, Hanbat National University, Daejeon 34158, Korea
Ki-Chan Kim: Department of Electrical Engineering, Hanbat National University, Daejeon 34158, Korea

Energies, 2020, vol. 13, issue 24, 1-9

Abstract: In this paper, the design process of brushless DC (BLDC) motor adopting the dual rotor structure that can reduce the overall size of the motor while generating the same torque as the conventional permanent magnet BLDC motor is analyzed. A simple size is selected by obtaining the torque per rotor volume (TRV), and a method of matching the counter electromotive force by selecting the pole-arc of the magnet through a magnetic equivalent circuit is analyzed. Since the efficiency is low because the 120-degree commutation method is selected, the middle stator is optimized through detailed design through the experimental design method. Afterwards, it has the advantage of being able to shift without stopping due to the characteristic of a dual rotor. For this, an analysis of the driving characteristics for each mode is performed.

Keywords: BLDC; dual rotor; magnetic equivalent circuit; operation mode (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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