반응 표면 기법을 통한 슬롯리스 BLDC 영구자석 모터 설계에 관한 연구

Abstract

Permanent Magnet (PM) motors are widely used across various industries such as automotive, aerospace, home appliances, and defense, due to their wide operating range, high power density, and precise controllability. In particular, slotless motors, characterized by the absence of teeth and slots, offer various electromagnetic and structural advantages over slotted types and are commonly used in servo and drive motor applications that demand high precision control and low vibration. However, in slotless motor design, a rotor with high inertia can degrade acceleration and deceleration performance, potentially leading to reduced responsiveness in dynamic systems. Therefore, this paper presents a design approach for a BLDC slotless PM motor considering both electromagnetic characteristics and rotor inertia. An optimal design was performed using Response Surface Methodology (RSM) and three-dimensional Finite Element Analysis (3D FEA) to maximize the torque constant while minimizing rotor inertia. Additionally, effective design strategies based on magnetic and electric loading were proposed. Finally, the feasibility of the proposed design method and the output performance of the BLDC slotless PM motor were validated through experimental testing of a prototype.