• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1051-1052
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• 2011

This paper deals with optimum design criteria to minimize the torque ripple of a concentrated winding Synchronous Reluctance Motor(SynRM) using Response Surface Methodology(RSM). The feasibility of using RSM with the finite element method(FEM) in practical engineering problem is investigated with omputational examples and comparison between the fitted response and the results obtained from an analytical solution according to the design variables of stator and rotor in concentrated winding SynRM(6slot). The focus of this paper is the efficiency evaluation on the basis of load condition in a Concentrated Winding Synchronous Reluctance Motor and distributed Winding Synchronous Reluctance Motor.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.989-990
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• 2011

This paper deal with the shape design of the rotor and stator to maximize the torque density in Interior Permanent Magnet(IPM) Motor. We make various motor models to analyze torque density. Using the two-dimensional finite element method, these motor models are discussed under the same condition. As a result, we have found the better shape of model.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.2177-2178
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• 2011

In this paper, adaptive speed sensorless vector control, sliding mode observer to be present. Adaptive sliding mode observer of the motor stator coordinate system using the voltage equations of the rotor flux components are observed. Lyapunov function of the induction motor speed is estimated by the relationship further. In order to establish such a control scheme based on the way conventional PI controller and sliding mode observer annexing characteristics of the system through simulation and experiment were compared. Analyzed and compared according to the results presented confirmed the usefulness of the system.

• Proceedings of the KIEE Conference
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• 1994.07a
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• pp.409-411
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• 1994

A rotating experimental unit for the train control is made and the train detection method by the inductive radio line is adopted. In this unit, the inductive radio line is spreaded on the rotor plate and the receiving antennas are equipped on the stator side. The detection circuits for train position and train speed are composed and an application of the train control by PID controller is presented.

• Journal of Electrical Engineering and Technology
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• v.12 no.6
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• pp.2307-2316
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• 2017

The aim of this paper is to provide an optimal design of in-wheel motor for an electric scooter (E-scooter) considering economical production. The preliminary development in-wheel motor, which has a direct-driven outer rotor type attached to the E-scooter's rear wheel without any gear, is introduced first. The objective of the optimal design of this in-wheel motor is to improve the output characteristics of the motor and to have a stator form to facilitate automatic winding. Response surface methodology was used for the optimal design and 2-dimensional finite element method was used for electro-magnetic field analysis. Experimental results showed that the designed and fabricated in-wheel motor could satisfy the required specifications in terms of speed, power, efficiency, and cogging torque.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.67 no.10
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• pp.1292-1297
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• 2018

In this paper, efficiency optimization design of 600W class IPMSM was performed by using Quasi-Newton method. The output was limited to 600W to meet the same output as the basic model. The behavior of each variable as the design progressed was judged on the efficiency, which is the target value through correlation analysis. The design variables were set as the width of the stator, the position of the permanent magnet from the end of the rotor, the thickness of the permanent magnet, and the width of the permanent magnet.

• The Transactions of the Korean Institute of Power Electronics
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• v.5 no.1
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• pp.72-78
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• 2000

본 논문에서는 이중여자 유도기를 풍력발전에 적용할 때 회전자위치 센서를 사용하지 않고 발전 출력제어 방법을 제안하였다. 모델기를 풍력발전에 적용하여 운전할 때 고정자는 계통선에 연결되어 있기 때문에 고정자 자속은 일정 값을 가지며 고정자 자속의 동기 각\ulcorner고는 일정한 상수값을 가진다. 또한 회전자 전류 및 고정자 전압과 전류를 이용하여 슬립각을 추정함으로써 속도를 추정할 수 있고 뿐만 아니라 회전자 전류제어에 의해 고정자측의 발전전력을 제어할 수가 있다. 이른 토대로 속도제어 및 발전출력에 대한 결과를 나타내므로써 제안한 알로리즘의 타당성을 입증하였다.

• Proceedings of the KIPE Conference
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• 2017.11a
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• pp.69-70
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• 2017

This paper presents design of control system for permanent magnet synchronous generator(PMSG). The gas engine make rotating mechanical energy from gas fuel energy. The rotor of synchronous generator is connected to axis of engine. And it converts the mechanical energy to the electrical energy. The control system of PMSG helps the electrical energy to flow to grid. the single phase pfc rectifier controls the DC-link voltage by controlling the current of filter inductor. If the DC-link voltage is higher than the voltage reference, the filter current could be controlled to flow to grid. The three phase inverter controls the stator current of generator. The direction of the current is controlled depends on motoring or generating mode. The feasibility of the grid-connected PMSG is verified by the experimental results with 1kW prototype.

• Proceedings of the KIEE Conference
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• 1992.07b
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• pp.695-698
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• 1992

When the inverter driven Induction motor is compared with sinusoidal voltage driving, the loss is increased and efficiency in the same output is decreased by the time harmonics in inverter output. These are based on the eddy current on stator and the skin effects of rotor bar current induced from time harmonic. The aim of this paper is to estimate the equivalent circuit parameter of squirrel cage induction motor fed from inverter considering this effects.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.2237_2238
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• 2009

This paper describes the design process of three-phase squirrel cage induction moter. stator and rotor were modelled with the result obtained from loading distribution on the provided specification. For proving validity of the result obtained from loading distribution, through Maxwell simulator the first test target values, output and efficency, synchronous speed and etc, were compared with the design result.