• Journal of Electrical Engineering and Technology
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• 제10권5호
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• pp.2057-2061
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• 2015

This paper describes analysis and experimental characterization of low speed direct drive fractional slot concentrated winding (FSCW) surface permanent magnet synchronous motor (SPMSM) with consequent pole (CP) rotor, for which studies have been recently performed. The proposed motor, which consists of 30 poles and 36 slots, is analyzed and characterized by extensive 2D finite element analysis (FEA) and together with 3D FEA for an appropriate PM overhang length design. The validity of the analysis is confirmed by the corresponding experiments which fully characterize the proposed motor with excellent agreement between the FEA and the experiments. Thermal stability is also experimentally examined to determine continuous operating points and instantaneous operating points of the proposed motor. It is highly expected that the proposed motor is applicable for low speed direct drive applications.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 추계학술대회 논문집 학회본부A
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• pp.49-51
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• 1998

This paper presents 2-pole permanent magnet synchronous motor(PM-SM) designed for the high-speed drives. Therefore. this motor has the NdFeB Permanent magnet as rotor. which is designed simper than the commercial PM-SM. We treated the developments - design. analysis - of PM-SM

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.882-883
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• 2011

This paper deals with comparison on Electromagnetic losses of slotted and slotless high-speed PM Machine for Micro Turbine. Losses are consist of core losses, copper losses and eddy current losses. We are using both analytical method and 2D Finite Element Method for more detailed losses analysis. And then We compare Electromagnetic losses of slotted and slotless PM synchronous machine. This machine has designed of a generator of 800W, 400000rpm and a starter of 400W, 200000rpm.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.852-853
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• 2008

This paper proposes an optimal design method for the shape optimization of the permanent magnets (PM) of an in-wheel permanent magnet synchronous motor (PMSM) to reduce the cogging torque considering a total harmonic distortion (THD) and a root mean square (RMS) value of back-EMF. In this method, the Kriging model based on a design of experiment (DOE) is applied to interpolate the objective function in the spaces of design parameters. The optimal design method for the PM of an in-wheel PMSM has to consider multi-variable and multi-objective functions. The developed design method is applied to the optimization for the PM of an in-wheel PMSM.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.31-33
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• 2002

This paper is presents dynamic analysis of slotless PM linear synchronous motor using 3-D analytical method and improvement of controllability using PI control system. In oredr to calculate dynamic characteristic, back-EMF waveform and inductance are caculated by PM's magnetic field and winding's magnetic filed respectively. PMLSM simulated by PI control system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.98-100
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• 2008

This paper deals with dynamic torque of PM Synchronous Motor (PMSM) according to driving method. The driving method is selected considering harmonic characteristics with the PMSM.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2000년도 전력전자학술대회 논문집
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• pp.434-438
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• 2000

In this paper the low cost sensorless control circuit for a PM synchronous motor without the mechanical rotor position sensors is presented. The sensorless control algorithm and position detection circuit for the sinusoidal current wave drive is more complex than that of the rectangular current wave drive. The proposed position sensing circuit is composed of an operational amplifier and several passive elements. The design procedures for getting the optimal parameters for the position sensing circuit are presented. The performance of the proposed algorithm is verified through the simulations and experiments.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 전력전자학술대회 논문집
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• pp.299-304
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• 1998

An improved nonlinear speed control of a permanent magnet synchronous motor(PMSM) is presented. A quasi-linearized and decoupled model including the influence of parameter variations and speed measurement error on the nonlinear speed control of a PMSM is derived. Using this model, to overcome the drawbacks of conventional nonlinear control scheme, the improved nonlinear control scheme that employs time delay control(TDC) is proposed. To show the validity of the proposed control scheme, simulation studies are carried out and compared with the conventional control scheme.

• Journal of Power Electronics
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• 제3권3호
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• pp.197-204
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• 2003

An improved nonlinear speed control of a permanent magnet synchronous motor (PMSM) is presented A quasi-linearized and decoupled model including the influence of parameter variations and speed measurement error on the nonlinear speed control of a PMSM is derived Using this model, to overcome the drawbacks of conventional nonlinear control scheme, the improved nonlinear control scheme which employs time delay control (TDC) scheme is proposed. To show the validity of the proposed control scheme, simulation studies are carried out and compared with the conventional control scheme.

• 전력전자학회논문지
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• 제13권4호
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• pp.295-302
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• 2008

본 논문에서는 세탁기용으로 사용될 영구자석형 릴럭턴스 동기전동기(permanent-magnet assisted reluctance synchronous motor : PMA-RSM)의 설계와 특성에 대해서 살펴본다. 제안된 PMA-RSM의 특성과 최대 토크 특성을 알아보기 위해서 유한 요소법(finite element method)을 이용 하였다. 저속 구간에서의 충분한 토크를 발생시키기 위해서 회전자의 구조는 릴럭턴스 토크를 만들어내는 돌극 구조와 회전자 내부의 공극에 영구자석을 삽입하는 구조로 구성되어 있다. 전형적인 자속 장벽형(Flux barrier type) 릴럭턴스 동기전동기(RSM : Reluctance Synchronous Motor)와 자속 장벽(Flux barrier)에 자석을 삽입한 경우에 발생되는 현상들에 대해서 비교 분석하고, 또한 제안된 PMA-RSM의 릴럭턴스 토크(reluctance torque)와 자석에 의한 자석 토크(magnetic alignment torque)가 서로 최대가 되는 시점을 시뮬레이션을 통하여 구하며, 그 결과를 이용하여 전동기의 특성, 평균토크 그리고 토크 리플에 대해서 유한 요소법을 통하여 살펴보았다.