• 전력전자학회논문지
• /
• 제16권1호
• /
• pp.1-10
• /
• 2011

본 논문에서는 영구자석 동기전동기(PMSM)의 강인한 속도 제어를 위하여 퍼지 부하 토크관측기와 퍼지 속도제어기를 제안한다. 또한, 퍼지 부하 토크관측기와 퍼지 속도제어기가 존재하기 위한 LMI 조건을 유도하고, 관측기 및 제어기의 이득을 계산한다. 제안된 제어시스템의 안정도가 보장됨을 해석적으로 증명한다. 본 연구에서 제안된 관측기 기반의 퍼지 속도제어기의 성능을 검증하기 위하여, 시뮬레이션 및 실험 결과가 주어졌다. 본 결과를 통하여 제안된 제어 알고리즘은 영구자석 동기전동기의 속도를 정확하게 제어할 수 있음을 검증하였다.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 1997년도 전력전자학술대회 논문집
• /
• pp.60-63
• /
• 1997

A new approach to the position sensor elimination of PM synchronous motor drives is presented in this study. Using the position sensing characteristics of PMSM itself, the actual rotor position as well as the machine speed can be estimated by adaptive flux observer and used as the feedback signal for the vector controlled PMSM drive. The adaptive speed estimation is achieved by model reference adaptive technique. The adaptive laws are derived by the Popov's hyperstability theory and the positivity concept. In order to verify the effectiveness of the proposed scheme, computer simulations are carried out for the actual parameters of a PM synchronous motor and the results well demonstrate that the proposed scheme provides a good estimation value of the rotor speed without mechanical sensor. It is also shown that the actual rotor position as well as the machine speed can be achieved under the variation of the magnet flux linkage. Since the flux linkages are estimated by the adaptive flux observer and used for the identification of the rotor speed, robust estimation of the rotor speed can be performed.

• 전력전자학회논문지
• /
• 제7권4호
• /
• pp.313-321
• /
• 2002

영구자석 동기전동기의 제동 알고리듬을 제안한다. 전동기의 고정자 저항을 제동저항으로 사용함으로써 전동기의 운동에너지를 부가적인 제어회로 없이 고정자권선에서 소모한다. 제안된 제동 알고리듬은 고정자권선에서 전력소모를 최대화하고 DC 링크 콘덴서전압 제한 및 인버터 전류제한 조건하에서 최대의 제동토크를 발생하여 제동시간을 최소화 할 수 있다.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2014년도 추계학술대회 논문집
• /
• pp.170-172
• /
• 2014

Permanent-magnet (PM) synchronous motors consist of PM rotors and ferromagnetic stators. When the rotor displaces from the center position, the air-gap magnetic field distorts, which result in unbalanced magnetic pull (UMP). In order to control the UMP and thereby reduce the vibration of a PM motor, it is necessary to measure the radial position of the rotor. In this paper, we propose a sensing method that utilizes linear Hall devices which replace the discrete Hall switches used for commutation. The results show the feasibility of the proposed sensing method.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 1998년도 창립기념 춘계학술대회 논문집
• /
• pp.450-457
• /
• 1998

Abstract - Linear Synchronous Motor has a large airgap comparing with rotary-type motor and especially, Permanent Magnet Linear Synchronous Motor(PM-LSM) which uses permanent magnet as a magnetic field, has a very large effective magnet airgap owing to permanent magnet structure. Accordingly, in case of 2-D analysis of the motor, the analysis error becomes large because leakage flux by which normal direction of the analysis region can not be considered, In this paper, the characteristic of PM-LSM for Maglev vehicle is analyzed exactly by 3-D Finite Element Method(3-D FEM). As the result, the effect of lateral-direction airgap magnetic flux density distribution on the analysis precision has been investigated and the motor characteristics according to primary motor parameter have been also made clear quantitatively. The accuracy of 3-D FEM has been confirmed by comparing the calculated results with the experimental results.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 1996년도 창립기념 전력전자학술발표회 논문집
• /
• pp.13-16
• /
• 1996

A new instantaneous torque control technique is presented for a high performance control of a permanent magnet synchronous motor. Using the model reference adaptive system technique, the linkage flux of the motor is estimated and the torque is instantaneously controlled by the proposed torque controller combining with a variable structure control and space vector PWM. The proposed torque control provides the advantage of reducing the torque pulsation caused by the flux harmonics. This control strategy is applied to the high torque PM synchronous motor drives for direct drive systems and is implemented by using a software of the DSP TMS320C30. The experiments are carried out for this system and the results well demonstrate the effectiveness of the proposed control.

• 한국산학기술학회논문지
• /
• 제20권3호
• /
• pp.8-15
• /
• 2019

영구자석 동기전동기는 벡터제어를 통해 우수한 효율로 다양한 산업분야에 적용되고 있다. 영구자석 동기전동기의 벡터제어를 위한 회전자 위치정보는 회전자 위치센서 또는 회전자 위치 추정기를 이용하여 검출한다. 회전자 위치추정기를 이용한 센서리스 제어로 가장 많이 적용되고 있는 모델기반 센서리스 제어는 역기전력기반의 센서리스 제어와 영구자석의 자속기반 센서리스 제어로 구분할 수 있다. 역기전력 기반의 센서리스 제어는 역기전력이 속도에 비례하므로 저속에서 회전자의 위치 추정성능이 떨어지는 단점이 있다. 자속기반 센서리스 제어의 경우 회전자 위치추정을 위한 영구자석의 자속의 크기는 속도에 관계없이 일정하기 때문에 넓은 속도 영역에서 회전자의 위치 추정성능이 우수하다. 하지만 모델기반 센서리스 제어는 영구자석 동기전동기의 수학적 모델을 이용하기 때문에 전동기 상수의 변화에 따라 회전자 위치 추정 성능이 영향을 받는다. 본 논문에서는 두 가지 모델기반 센서리스 제어 방법에 대해 고정자 저항 및 인덕턴스의 전동기 상수 오차가 -30% ~ 30%로 변동하였을 때 역기전력 추정 성능, 자속 추정 성능, 회전자의 위치추정 성능을 이론적으로 비교, 분석하고 모의해석 및 실험으로 검증하였다.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
• /
• 제4B권4호
• /
• pp.157-169
• /
• 2004

Motor & generator operation at widely variable speeds is needed in various applications but hybrid and electric vehicle (HEV) stand out today, as quite a few companies are launching this year their mass production of HEVs. The quest for better starter-generators is far from ended, though. The present review paper unfolds a comparative critical evaluation of various starter-generators and their control for HEV. Induction, interior PM synchronous, transverse-flux PM synchronous, switched reluctance, together with claw-pole and biaxial excitation PM synchronous (BEGA) configurations with their control are all considered in system evaluations.

• 전기학회논문지
• /
• 제59권10호
• /
• pp.1797-1802
• /
• 2010

This paper proposes a new fuzzy speed controller based on the Takagi-Sugeno fuzzy method to achieve a robust speed control of a permanent magnet synchronous motor(PMSM). The proposed controller requires the information of the load torque, so the second-order load torque observer is used to estimate it. The LMI condition is derived for the existence of the proposed fuzzy speed controller, and the LMI parameterization to calculate the gain matrices of the controller is provided. It is proven that the augmented control system including the fuzzy speed controller and the load torque observer is exponentially stable. To evaluate the performance of the proposed fuzzy speed controller, the simulation and experimental results are presented under motor parameter and load torque variations. Finally, it is clearly verified that the proposed control method can be used to accurately control the speed of a permanent magnet synchronous motor.

• Journal of Magnetics
• /
• 제16권4호
• /
• pp.417-422
• /
• 2011

This paper presents the characteristics of PM eddy current loss and harmonic iron loss for PM step-skewed Interior Permanent Magnet Synchronous Motor (IPMSM) with concentrated windings and multi-layered PM under the running condition of maximum torque per ampere (MTPA) and flux-weakening control. In particular, PM eddy current loss and harmonic iron loss in IPMSM have been numerically computed with three-dimensional Finite Element Analysis (3D FEA), whereby IPMSM with concentrated windings and multi-layered PM has been designed to identify the optimized skew angle contributing to the reduced PM eddy current loss and torque ripples, while maintaining the required average torque. Furthermore, numerical investigation on PM eddy current loss and iron loss at MTPA and flux-weakening control has been carried-out in terms of PM step-skew.