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Chinchul Choi,Wootaik Lee IEEE 2012 IEEE transactions on industrial electronics Vol.59 No.9
<P>This paper analyzes and compensates unavoidable time delay effects in a hardware-in-the-loop (HIL) simulation for automotive permanent magnet synchronous motordrive systems. The amount of time delay between a digital controller and HIL simulator is investigated. The effects of the time delay are analyzed by use of s-domain representation of the entire closed-loop system. In addition, a stability study has been carried out using a root locus. The analysis results show that the time delay strongly affects the accuracy and stability of the HIL simulation according to increment of the motor angular speed. For an accurate HIL simulation, a compensation of the time delays is applied and verified through comparison with offline simulation results.</P>
Design and Temporal Analysis of Hardware-in-the-loop Simulation for Testing Motor Control Unit
Chinchul Choi,Kangseok Lee,Wootaik Lee 대한전기학회 2012 Journal of Electrical Engineering & Technology Vol.7 No.3
This paper describes a design and temporal analysis of a hardware-in-the-loop (HIL) simulation environment for testing a motor control unit (MCU). The design concepts and main characteristics including unavoidable time delays of each component module are described. From temporal analysis results according to the module integration method, an appropriate solution is proposed to fix and minimize time delays. In order to verify the effectiveness of the proposed solution, the HIL test results are compared with the results of experiments and an offline simulation.
Chinchul Choi,Wootaik Lee,Soon-O Kwon,Jung-Pyo Hong IEEE 2013 IEEE transactions on magnetics Vol.49 No.6
<P>This paper quantitatively analyzes inductance estimation errors due to temperature variation and proposes accurate experimental estimation methods considering the temperature distribution of an interior permanent magnet synchronous machine (IPMSM). Accurate knowledge of direct and quadrature-axis inductances is essential for high-performance control of an IPMSM. From the quantitative error analysis results, it is shown that the temperature variation is a very sensitive factor for the accuracy of the experimental estimation of the inductances. For accurate temperature consideration, two experimental estimation approaches are proposed. One uses the temperature measured at end windings to represent the internal temperature of the machine. The other uses both the measured temperature and other temperature information obtained from a temperature distribution analysis. This paper carries out a case study in which the proposed estimation methods are applied to a sample IPMSM with ferrite magnets. Experimental results are compared with finite element analysis (FEA) results in order to verify the effectiveness of the proposed methods.</P>
스핀들 구동용 매입형 영구자석 동기 전동기의 동적 해석 모델 개발
최진철(Chinchul Choi),홍원복(Wonbok Hong),이우택(Wootaik Lee) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
This paper presents the new simulation model composed of MATLAB/Simulink's basic blocks for a dynamic analysis of the Interior Permanent Magnet Synchronous Motor(IPMSM) Drive System which is integrated with a controller and power converter. The simulation model can be implemented by the association of independent four sub-blocks which consist of the controller and driver block, the power converter block, the IPMSM electrical block, and the IPMSM mechanical block. This simple construction is proper to produce the entire characteristics as a level with system and the interaction between each components unlike other biased and heavy simulation tools concentrated on the analysis of a specific part. Additional main feature of the new model is that another independent sub-block such as a load dynamic model of spindle driver can be applied easily for a effective dynamic analysis of the spindle driver system.
표면 부착 영구자석형 전동 시스템의 성능 해석을 위한 Simulink 모델 개발
최진철(Chinchul Choi),박성호(Sungho Park),이우택(Wootaik Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
This paper presents the new simulation model for the performance analysis of Surface-Mounted Permanent Magnet Synchronous Motor(SMPMSM) Drive System which is integrated with a controller and a power converter. To enhance reusability and compatibility, the system model is expressed by the association of independent sub-modules reflecting the real physical construction. This concept allows another independent sub-module to be effectively inserted in the model for the comprehensive analysis of larger systems such as a Machine Tool and HEV. The developed model which is composed of MATLAB/Simulink's basic blocks can rapidly analyze not only the entire behavior of system, but also the functional relationship between each components for the effective development of controller.