• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제49권7호
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• pp.468-474
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• 2000

This paper presents an investigation of the parameter modeling on the basis of Finite Element (FE) analysis in which the variable frequency characteristic in field weakening is considered in Interior Permanent Magnet Synchronous Motors (IPMSM). The parameters of IPMSM have nonlinear characteristics not only in accordance with the load variation but also with the current phase angle of a system fed inverter. From the results of FE analysis, the performances of torque and speed-power are simulated and the validity of the proposed FE analysis is compared with experimental results.

• Journal of Electrical Engineering and Technology
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• 제12권1호
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• pp.236-248
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• 2017

A direct stator flux vector control scheme in discrete-time domain is proposed in this paper for the interior permanent magnet synchronous motor (IPMSM) drive to remove the proportional-integral (PI) controller from the direct torque control (DTC) scheme applied to IPMSM and to obtain faster dynamic response and lower torque ripple output. The output of speed outer loop is used as the desired torque angle instead of the desired torque in the proposed scheme. The desired stator flux vector in dq coordinate is calculated with a given amplitude. The state-space equations in discrete-time for IPMSM are established, the actual stator flux vector is estimated in deadbeat manner by a full-order state observer, and then the closed-loop control is achieved by the pole placement. The stator flux error vector is utilized to calculate the reference stator voltage vector. Extracting the angle position and amplitude from the estimated stator flux vector and estimating the output torque are eliminated for the direct feedback control of the stator flux vector. The proposed scheme is comparatively investigated with a PI-SVM DTC scheme by experiment results. Experimental results show the feasibility and advantages of the proposed control scheme.

• 한국전자통신학회논문지
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• 제8권6호
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• pp.881-889
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• 2013

본 논문은 IPMSM(Interior Permanent Magnet Synchronous Motor)의 속도 제어를 위한 비선형 백스텝핑 제어 기법을 제안한다. 비선형 백스텝핑 제어기법의 이득은 정상상태 에러를 제거하고, 좀 더 안정한 결과를 얻을 수 있도록 에러의 적분 이득을 포함하여 설계하였다. 또한, 부하 토크를 추정할 수 있도록 설계하여 부하의 변동에 대하여 빠른 적응성을 가지도록 하였다. 모의 실험을 통하여 적분 이득을 가지는 백스텝핑 제어기가 일정한 토크 운전영역에서 안정한 제어기임을 검증하고, 적분 이득이 없는 백스텝핑 제어기와 성능을 비교하였다.

• 전기전자학회논문지
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• 제23권2호
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• pp.628-635
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• 2019

본 논문에서는 일정 스위칭 주파수를 가지는 직접 토크 제어(Direct Torque Control, DTC) 기반의 매입형 영구자석 동기 전동기(Interior Permanent Magnet Synchronous Motor, IPMSM)에서 속응성 향상을 위한 슬라이딩 모드 제어(Sliding Mode Control, SMC) 기법을 제안한다. 일정 스위칭 주파수를 가지는 DTC 기법은 비례-적분(Proportional-Integral, PI) 토크 제어기와 삼각파 비교기로 구성되어 토크 오차 상태를 일정하게 제어한다. 이는 일반적인 히스테리시스 기반의 DTC 기법에 비해 속응성이 좋지 않다. 본 논문에서는 SMC 기법을 이용하여 일정 스위칭 주파수를 가지는 DTC 기법의 속응성을 향상시키는 방법을 제안한다. 제안하는 기법의 타당성을 시뮬레이션을 통하여 검증한다.

• Journal of Electrical Engineering and Technology
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• 제9권5호
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• pp.1582-1591
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• 2014

This paper presents a hybrid sensorless control for an interior permanent magnet synchronous motor (IPMSM) for zero-, low-, and high-speed regions. Many sensorless control methods such as an observer-based estimator have been introduced. However, most of the observer-based estimators have a disadvantage at start-up and in the low-speed region. To solve this problem, a simple strategy of using a hybrid system is proposed by integrating a high-frequency (HF) signal injection method and a full-order flux observer. In addition, an HF signal injection method with only a low pass filter (LPF) is proposed to simplify the hybrid system. The hybrid system achieves high-performance drive throughout the entire speed range. The effectiveness of the proposed hybrid technique is verified by experiments using an 11-kW IPMSM drive system.

• 대한전기학회논문지
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• 제41권7호
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• pp.723-734
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• 1992

In this paper, the characteristics of IPMSM(Interior-type Permanent Magnet Synchronous Motor) are simulated using 2-D. finite element method. This paper deals with the following characteristics : air gap flux density considering skew, back e.m.f., torque and inductance. Back e.m.f. is calculated using the flux obtained from the vector potential of FEM solution. Torque is calculated using improved Maxwell stress tensor method and current angle which is obtained from the controller. Direct axis inductance and quadrature axis inductance are also calculated using energy perturbation method. Computed results are found in satisfactory agreement with experimental ones. This method also can be applied for the computation and analysis of the characteristics of SPMSM, current-excited synchronous motor and reluctance motor.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2017년도 전력전자학술대회
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• pp.405-406
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• 2017

본 논문에서는 매입형 영구자석 동기전동기(Interior Permanent Magnet Synchronous Motor, IPMSM)의 전압각 제어 시에 최대 토크 운전에 필요한 전압각(Optimal Voltage Angle)을 얻기 위해 IPMSM의 설계에 따른 최적 전압각을 속도 영역에 따라 분석하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.853-854
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• 2006

Interior permanent magnet synchronous motor(IPMSM) has higher power density than other PM(permanent Magnet) machines due to reluctance torque in addition to magnetic torque, and the ratio of magnetic and reluctance torque has influences on motor characteristics such as input current, efficiency, power factor, etc. Therefore, this paper presents the output characteristics of IPMSM according to the ratio magnetic and reluctance torque of IPMSM and discuss the design strategy of IPMSM.

• 전기학회논문지
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• 제67권10호
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• pp.1303-1307
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• 2018

A improving sensorless compensator for the IPMSM(Interior Permanent Magnet Synchronous Motor) drive system is proposed. Generally, the motor drive system is required the robust parameter variation and disturbance. The speed estimation methods of the conventional IRP(Instantaneous Reactive Power) compensator is improved by the speed estimation techniques of the current model observer with the proposed instantaneous reactive power compensator. Performance evaluations of the novel speed error compensator and sensorless control system are carried out by the experiments.

• Journal of Electrical Engineering and Technology
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• 제9권5호
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• pp.1614-1622
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• 2014

A novel equivalent flux sliding-mode observer (SMO) is proposed for dual three-phase interior permanent magnet synchronous motor (DT-IPMSM) drive system in this paper. The DT-IPMSM has two sets of Y-connected stator three-phase windings spatially shifted by 30 electrical degrees. In this method, the sensorless drive system employs a flux SMO with soft phase-locked loop method for rotor speed and position estimation, not only are low-pass filter and phase compensation module eliminated, but also estimation accuracy is improved. Meanwhile, to get the regulator parameters of current control, the inner current loop is realized using a decoupling and diagonal internal model control algorithm. Experiment results of 2MW-level DT-IPMSM drives system show that the proposed method has good dynamic and static performances.