슬롯리스 영구자석 동기 전동기의 와전류 손실에 의한 드래그 토크 예측 = Drag torque estimation based on eddy current loss of Slotless Brushless DC machine

다국어 초록 (Multilingual Abstract)

The torque is very essential for performance evaluation of electric machines because it is directly connected with power loss for dynamic characteristics, To evaluate dynamic performance, the torque with harmonic component according to time is introduced Especially, eddy current loss is significantly increased in high speed so it is difficult to express the dynamic characteristic without reflection about losses, Therefore, in this paper, rotor eddy current loss wave is derived by fast fourier transform(FFT) which is using the phase current wave obtained from finite element analysis(FEA) according to two conditions; one has rotor eddy current loss, the other is not. The core loss is deduced by a modified Steinmetz equation(MSE) and additional losses are considered from an experiment. Those losses are worked as drag torque which is inverse force to performance of a machine. The operating torque estimated from difference between drag torque and electric torque is closely reflects the dynamic characteristics.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 전자기 토크에 대한 수학적 모델링
• 3. 토크 상수 도출
• 4. 와전류 손실에 의한 드래그 토크 도출
• 5. 결과
• [참고문헌]