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코깅토크 저감을 위한 Spoke Type BLDC 전동기의 새로운 극 형상 설계
황규윤(Kyu Yun Hwang),이상봉(Sang Bong Rhee),양병렬(Byoung Yull Yang),권병일(Byung Il Kwon) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
This paper proposes a design method by varying rotor pole shape to reduce cogging torque, torque ripple and harmonics of back emf in Spoke type brushless DC(BLDC) motor. In the process of design and analysis, Response surface method(RSM) and finite-element method(FEM) are employed to get the rotor geometry and verify the results of new pole shape.
스큐착자된 영구자석과 오버행 구조를 갖는 BLDC 전동기의 최적화 설계에 관한 연구
황규윤(Kyu-yun Hwang),류세현(Se-hyun Rhyu),권병일(Byung-il Kwon) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10
This paper introduces the novel coefficient function for the skewed PM and overhang structured BLDC motor. The novel coefficient function is obtained by the moving least square (MLS) method and 3D FEM and is utilized to reduce the executing time in optimal design. By using calculated coefficient function and 2D FEM, the additional MLS regression model is obtained to calculate a more reasonable optimal skew angle and overhang length of PM with minimized PM size considering with the skew and overhang effect. Finally, the optimized result utilizing combined MSL regressive equations is compared with a 3D FEM result to verify the proposed design.
정현적인 역기전력 파형을 갖는 인버터 구동용 집중권형 Spoke type IPMSM의 토크 및 철손해석에 관한 연구
황규윤(Kyu-yun Hwang),권병일(Byung-il Kwon) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper investigates the torque and iron loss characteristics of inverter-fed spoke type interior permanent magnet synchronous motor (IPMSM) optimized for sinusoidal distributed back-EMF. First, an optimized model for sinusoidal distributed magnetic flux density is introduced with verification by experiment. Then to investigate improved characteristics of optimized spoke type IPMSM model for torque and iron loss, two types of systems are developed and compared the direct- and quadratic-axis (DQ) model which is well known motor modeling with PWM inverter drive and FE-based physical model built to consider the nonlinearity of both the motor and the motor drive. The results show the validity of the FE-based model has its practical superiority in drives applications and improved torque and iron loss characteristics for optimized rotor pole.
IPM type BLDC 전동기의 코깅토크 저감을 위한 Hybrid 최적설계
황규윤(Kyu-yun Hwang),이상봉(Sang-bong Rhee),권병일(Byung-il Kwon) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
A hybrid optimization method is proposed for cogging torque reducing in BLDC motor. The proposed hybrid optimization method comprises a response surface method (RSM) and a gradient search method (GSM). The RSM is effective and global method in optimization problem but having large approximation error. The GSM is accurate and fast search method for optimal solution but having local behavior. To reduce approximation error and computation time a hybrid method (RSM+GSM) is proposed method. To illustrate the effectiveness of the proposed method, a comparison between conventional RSM and the proposed hybrid method is made. A simulation results verify that the hybrid method can achieve favorable design performance.
코깅 토오크 저감을 위한 Spoke형 BLDC 전동기의 회전자 극 형상설계에 관한 연구
黃奎尹(Kyu Yun Hwang),李相奉(Sang Bong Rhee),梁炳烈(Byoung Yull Yang),權炳一(Byung Il Kwon) 대한전기학회 2007 전기학회논문지 Vol.56 No.5
In this paper, design of spoke type BLDC motor which have a characteristics of concentrating fluxes and relatively high reluctance torque among IPM BLDC motors has been researched. To reduce cogging torque and torque ripple, rotor pole shape of optimal design is proposed. To clearly see the effects due to the changed rotor pole shape, magnetic circuit model, 2D FEM and design of experiments (DOE) are used. Then considering these results proper rotor pole shape which have an good effect on air gap flux density and cogging torque, back-emf is designed. Moreover, the validity of proposed model in this paper is also verified by comparison between gained experiment and analysis data.
제어특성과 기계적 응력을 고려한 Spoke-Type IPMSM의 최적설계에 대한 연구
손율규(Yul-kyu Son),황규윤(Kyu-yun Hwang),권병일(Byung-il Kwon) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper introduces the optimal design process to effectively reduce the cogging torque considering the control characteristic and mechanical stress on the rotor in Spoke-Type interior permanent magnet synchronous motor (IPMSM). The maximum torque control is used to calculate the torque and efficiency, and the structural analysis is used to analyze the mechanical stress on the rotor under motoring. For an increase in torque and efficiency in constant power region, the saliency ratio is increased than initial model. The two points, 2000 rpm (rated speed) in constant torque region and 4000 rpm (double rated speed) in constant power region, are chosen for comparing the torque and efficiency with initial model. The maximum torque control is consisted of maximum torque per ampere (MTPA) control in constant torque region and flux weakening (FW) control in constant power region. In the optimal design process, radial basis function (RBF) and genetic algorithm (GA) are used.