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Chang-Seok Park
Kyungnam University

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Journal article
Published: 26 December 2017 in Far East Journal of Electronics and Communications
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ACS Style

Chang-Seok Park; Tae-Uk Jung. IMPROVED DEAD TIME EFFECT COMPENSATOR FOR PWM INVERTER. Far East Journal of Electronics and Communications 2017, 17, 1575 -1580.

AMA Style

Chang-Seok Park, Tae-Uk Jung. IMPROVED DEAD TIME EFFECT COMPENSATOR FOR PWM INVERTER. Far East Journal of Electronics and Communications. 2017; 17 (6):1575-1580.

Chicago/Turabian Style

Chang-Seok Park; Tae-Uk Jung. 2017. "IMPROVED DEAD TIME EFFECT COMPENSATOR FOR PWM INVERTER." Far East Journal of Electronics and Communications 17, no. 6: 1575-1580.

Conference paper
Published: 01 December 2017 in 2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS)
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This paper presents a torque error compensation algorithm for a surface mounted permanent magnet synchronous machine (SPMSM) through real time permanent magnet (PM) flux linkage estimation at various temperature conditions. As known, PM flux linkage in SPMSM is varied by thermal conditions. Since an Maximum Torque Per Ampere (MTPA) look up table (LUT), a control method used for copper loss minimization, is developed based on estimated PM flux linkage, variation of PM flux linkage results in undesired torque development of SPMSM drives. In this paper, PM flux linkage is estimated through a stator flux linkage observer and the torque error is compensated using the estimated PM flux linkage in real time. In this paper, the proposed torque error compensation algorithm is verified in simulation and experiment.

ACS Style

Jae Suk Lee; Chang-Seok Park; Seon-Hwan Hwang. Torque error compensation of SPMSM drives using a stator flux linkage observer. 2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS) 2017, 214 -218.

AMA Style

Jae Suk Lee, Chang-Seok Park, Seon-Hwan Hwang. Torque error compensation of SPMSM drives using a stator flux linkage observer. 2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS). 2017; ():214-218.

Chicago/Turabian Style

Jae Suk Lee; Chang-Seok Park; Seon-Hwan Hwang. 2017. "Torque error compensation of SPMSM drives using a stator flux linkage observer." 2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS) , no. : 214-218.

Journal article
Published: 30 November 2017 in Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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This paper proposes a synchronous control method for improving the efficiency of a Cascaded Buck-Boost converter for power supply of marine lantern. Conventional Cascaded Buck-Boost converter have a disadvantage in that the efficiency is reduced due to large conduction loss due to the forward voltage drop of the diode. In order to solve this problem, a synchronous control method was applied to improve the total system efficiency of the converter by replacing the diode of Cascaded Buck-Boost converter with a MOSFET. The validity of the proposed synchronous Cascaded Buck-Boost converter was verified through the analysis of loss and experiment.

ACS Style

Kyung-Hun Kim; Chang-Seok Park; Tae-Uk Jung. Synchronous Control Method of Cascaded Buck-Boost Converter for Improving Efficiency. Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 2017, 31, 37 -44.

AMA Style

Kyung-Hun Kim, Chang-Seok Park, Tae-Uk Jung. Synchronous Control Method of Cascaded Buck-Boost Converter for Improving Efficiency. Journal of the Korean Institute of Illuminating and Electrical Installation Engineers. 2017; 31 (11):37-44.

Chicago/Turabian Style

Kyung-Hun Kim; Chang-Seok Park; Tae-Uk Jung. 2017. "Synchronous Control Method of Cascaded Buck-Boost Converter for Improving Efficiency." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 31, no. 11: 37-44.

Journal article
Published: 08 September 2017 in Energies
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This paper presents a torque error compensation algorithm for a surface mounted permanent magnet synchronous machine (SPMSM) through real time permanent magnet (PM) flux linkage estimation at various temperature conditions from medium to rated speed. As known, the PM flux linkage in SPMSMs varies with the thermal conditions. Since a maximum torque per ampere look up table, a control method used for copper loss minimization, is developed based on estimated PM flux linkage, variation of PM flux linkage results in undesired torque development of SPMSM drives. In this paper, PM flux linkage is estimated through a stator flux linkage observer and the torque error is compensated in real time using the estimated PM flux linkage. In this paper, the proposed torque error compensation algorithm is verified in simulation and experiment.

ACS Style

Chang-Seok Park; Jae Suk Lee. A Torque Error Compensation Algorithm for Surface Mounted Permanent Magnet Synchronous Machines with Respect to Magnet Temperature Variations. Energies 2017, 10, 1365 .

AMA Style

Chang-Seok Park, Jae Suk Lee. A Torque Error Compensation Algorithm for Surface Mounted Permanent Magnet Synchronous Machines with Respect to Magnet Temperature Variations. Energies. 2017; 10 (9):1365.

Chicago/Turabian Style

Chang-Seok Park; Jae Suk Lee. 2017. "A Torque Error Compensation Algorithm for Surface Mounted Permanent Magnet Synchronous Machines with Respect to Magnet Temperature Variations." Energies 10, no. 9: 1365.

Journal article
Published: 07 August 2017 in Energies
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This paper proposes a back electromotive force estimation error compensation method for accurate rotor position estimation of surface mounted permanent magnet synchronous motors. When estimating the rotor position of surface mounted permanent magnet synchronous motor sensorless drives, a direct current offset error component occurs in the voltage sensor. As a result, the rotor position is distorted and the sensorless control in surface mounted permanent magnet synchronous motor is degraded. In addition, the dq-axis voltages in the synchronous reference frame have the direct current offset error component, ripples compared with the motor frequency under the distorted rotor position. In this paper, the effects of the direct current offset errors are analyzed based on the synchronous reference frame phase locked loop. To remove this direct current offset error component, a d-axis voltage is converted into a synchronous reference frame again to compensate. In other words, it is a dual synchronous coordinate conversion compensation method. The compensator utilizes a proportional-integral controller that compensates by estimating the direct current offset error component. The proposed method is useful for the improvement of surface mounted permanent magnet synchronous motor sensorless control and operating performance. The effectiveness of the proposed algorithm is verified through PSIM simulation and experimental results.

ACS Style

Tae-Uk Jung; Jung-Hoon Jang; Chang-Seok Park. A Back-EMF Estimation Error Compensation Method for Accurate Rotor Position Estimation of Surface Mounted Permanent Magnet Synchronous Motors. Energies 2017, 10, 1160 .

AMA Style

Tae-Uk Jung, Jung-Hoon Jang, Chang-Seok Park. A Back-EMF Estimation Error Compensation Method for Accurate Rotor Position Estimation of Surface Mounted Permanent Magnet Synchronous Motors. Energies. 2017; 10 (8):1160.

Chicago/Turabian Style

Tae-Uk Jung; Jung-Hoon Jang; Chang-Seok Park. 2017. "A Back-EMF Estimation Error Compensation Method for Accurate Rotor Position Estimation of Surface Mounted Permanent Magnet Synchronous Motors." Energies 10, no. 8: 1160.

Conference paper
Published: 01 May 2017 in 2017 IEEE International Electric Machines and Drives Conference (IEMDC)
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To improve the efficiency of wind turbines, permanent magnet synchronous generator has been used instead of doubly-fed induction generator. Permanent magnet synchronous generator has higher efficiency than doubly-fed induction generator because it has no winding loss in the rotor, but it has cogging torque which increases the cut-in speed of wind turbines. Cut-in speed is a kind of major design factor of generators for the wind turbines. In previous studies, the cogging torque reduction methods are proposed but these methods have negative effects on performance or efficiency. In this paper, the rounded edge shape of permanent magnet is proposed to reduce cogging torque. The proposed method aims to design the edge of permanent magnet for minimizing the air-gap reluctance variation.

ACS Style

Jin-Hyung Yoo; Chang-Seok Park; Tae-Uk Jung. Permanent magnet structure optimization for cogging torque reduction of outer rotor type radial flux permanent magnet generator. 2017 IEEE International Electric Machines and Drives Conference (IEMDC) 2017, 1 -6.

AMA Style

Jin-Hyung Yoo, Chang-Seok Park, Tae-Uk Jung. Permanent magnet structure optimization for cogging torque reduction of outer rotor type radial flux permanent magnet generator. 2017 IEEE International Electric Machines and Drives Conference (IEMDC). 2017; ():1-6.

Chicago/Turabian Style

Jin-Hyung Yoo; Chang-Seok Park; Tae-Uk Jung. 2017. "Permanent magnet structure optimization for cogging torque reduction of outer rotor type radial flux permanent magnet generator." 2017 IEEE International Electric Machines and Drives Conference (IEMDC) , no. : 1-6.

Journal article
Published: 01 November 2016 in Journal of Electrical Engineering & Technology
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ACS Style

Chang-Seok Park; Tae-Uk Jung. Improved DC Offset Error Compensation Algorithm in Phase Locked Loop System. Journal of Electrical Engineering & Technology 2016, 11, 1707 -1713.

AMA Style

Chang-Seok Park, Tae-Uk Jung. Improved DC Offset Error Compensation Algorithm in Phase Locked Loop System. Journal of Electrical Engineering & Technology. 2016; 11 (6):1707-1713.

Chicago/Turabian Style

Chang-Seok Park; Tae-Uk Jung. 2016. "Improved DC Offset Error Compensation Algorithm in Phase Locked Loop System." Journal of Electrical Engineering & Technology 11, no. 6: 1707-1713.

Conference paper
Published: 01 October 2015 in 2015 18th International Conference on Electrical Machines and Systems (ICEMS)
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The permanent magnet synchronous motor which has permanent magnet instead of field winding in the rotor has especially higher efficiency and torque per weight than other types of motor. When the irreversible demagnetization is occurred, users can be exposed to high risk of accident by the fault operation of motor. Because of this, the irreversible demagnetization of permanent magnet should be detected by using any kinds of method to reduce the risk of accident. In this study, the demagnetization diagnosis method based on the result at the rated operating condition simulation is proposed for the permanent magnet synchronous motor. The input current waveforms are analyzed by using the continuous wavelet transform to detect demagnetized poles in the model.

ACS Style

Jin-Hyung Yoo; Chang-Seok Park; Tae-Uk Jung. Demagnetization diagnosis of permanent magnet synchronous motor by using continuous wavelet transform. 2015 18th International Conference on Electrical Machines and Systems (ICEMS) 2015, 1486 -1489.

AMA Style

Jin-Hyung Yoo, Chang-Seok Park, Tae-Uk Jung. Demagnetization diagnosis of permanent magnet synchronous motor by using continuous wavelet transform. 2015 18th International Conference on Electrical Machines and Systems (ICEMS). 2015; ():1486-1489.

Chicago/Turabian Style

Jin-Hyung Yoo; Chang-Seok Park; Tae-Uk Jung. 2015. "Demagnetization diagnosis of permanent magnet synchronous motor by using continuous wavelet transform." 2015 18th International Conference on Electrical Machines and Systems (ICEMS) , no. : 1486-1489.

Proceedings article
Published: 01 June 2015 in 2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
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This paper proposes a dc error compensation algorithm using d-q synchronous coordinate transform phase-locked-loop in single-phase grid-connected converters. The DC errors are caused by the process of analog to digital conversion and the distorted grid voltage. The DC error can be remove by controlled the synchronous d-axis voltage using integral operation and digital infinite impulse response filter. In this paper, integral compensator and digital infinite impulse response filter are applied in order to remove the DC errors which cause the periodic ripples with grid frequency in D-Q synchronous coordinate transform phase-locked-loop.

ACS Style

Chang Seok Park; Tae Uk Jung; Park Chang Seok. A DC noise error compensator of single-phase grid-connected converter in D-Q synchronous reference frame. 2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) 2015, 1 -5.

AMA Style

Chang Seok Park, Tae Uk Jung, Park Chang Seok. A DC noise error compensator of single-phase grid-connected converter in D-Q synchronous reference frame. 2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems (PEDG). 2015; ():1-5.

Chicago/Turabian Style

Chang Seok Park; Tae Uk Jung; Park Chang Seok. 2015. "A DC noise error compensator of single-phase grid-connected converter in D-Q synchronous reference frame." 2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) , no. : 1-5.

Journal article
Published: 29 May 2015 in Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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This paper proposes a new switching algorithm for an controllable clamp snubber to improve the efficiency of a fly-back converter system. This system uses an controllable clamp method for the snubber circuit for the efficiency and reliability of the system. However, the active clamp snubber circuit has the disadvantage that system efficiency is decreased by switch operating time because of heat loss in resonance between the snubber capacitor and leakage inductance. To address this, this paper proposes a new switching algorithm. The proposed algorithm is a technique to reduce power consumption by reducing the resonance of the snubber switch operation time. Also, the snubber switch is operated at zero voltage switching by turning on the snubber switch before main switch turn-off. Experimental results are presented to show the validity of the proposed controllable clamp control algorithm.

ACS Style

Chang-Seok Park; Tae-Uk Jung. A Study on the Controllable Snubber for Switching Loss Reduction in Interleaved Fly-Back Converter. Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 2015, 29, 57 -64.

AMA Style

Chang-Seok Park, Tae-Uk Jung. A Study on the Controllable Snubber for Switching Loss Reduction in Interleaved Fly-Back Converter. Journal of the Korean Institute of Illuminating and Electrical Installation Engineers. 2015; 29 (5):57-64.

Chicago/Turabian Style

Chang-Seok Park; Tae-Uk Jung. 2015. "A Study on the Controllable Snubber for Switching Loss Reduction in Interleaved Fly-Back Converter." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 29, no. 5: 57-64.

Journal article
Published: 30 April 2015 in Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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ACS Style

Chang-Seok Park; Tae-Uk Jung. A Study on Optimal Current Control Method for Small BLDC Motor Drive. Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 2015, 29, 108 -115.

AMA Style

Chang-Seok Park, Tae-Uk Jung. A Study on Optimal Current Control Method for Small BLDC Motor Drive. Journal of the Korean Institute of Illuminating and Electrical Installation Engineers. 2015; 29 (4):108-115.

Chicago/Turabian Style

Chang-Seok Park; Tae-Uk Jung. 2015. "A Study on Optimal Current Control Method for Small BLDC Motor Drive." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 29, no. 4: 108-115.

Conference paper
Published: 01 December 2014 in Journal of international Conference on Electrical Machines and Systems
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ACS Style

Chang-Seok Park; Tae-Uk Jung. A New Controllable Active Clamp Algorithm for Switching Loss Reduction in a Module Integrated Converter System. Journal of international Conference on Electrical Machines and Systems 2014, 3, 465 -471.

AMA Style

Chang-Seok Park, Tae-Uk Jung. A New Controllable Active Clamp Algorithm for Switching Loss Reduction in a Module Integrated Converter System. Journal of international Conference on Electrical Machines and Systems. 2014; 3 (4):465-471.

Chicago/Turabian Style

Chang-Seok Park; Tae-Uk Jung. 2014. "A New Controllable Active Clamp Algorithm for Switching Loss Reduction in a Module Integrated Converter System." Journal of international Conference on Electrical Machines and Systems 3, no. 4: 465-471.

Conference paper
Published: 01 October 2013 in 2013 International Conference on Electrical Machines and Systems (ICEMS)
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Recently, the MIC system have been actively studied to reduce switching losses and improve its reliability and efficiency. The Active clamp Flyback converter is based on the Flyback converter topology. But, the Flyback converter generates the voltage spike between Drain and Source of the MOSFET device. This spike causes losses and noises of the converter. So, the Active clamp Flyback converter is studied the focus of the voltage spike reduction. In this paper, The New Active Clamp Fly-back Converter is proposed to improve the efficiency by the Power-Sim simulator and the experiment.

ACS Style

Chang-Seok Park; June-Woo Jo; Tae-Uk Jung. New active clamp technique for switching losses reduction of MIC systems. 2013 International Conference on Electrical Machines and Systems (ICEMS) 2013, 1697 -1701.

AMA Style

Chang-Seok Park, June-Woo Jo, Tae-Uk Jung. New active clamp technique for switching losses reduction of MIC systems. 2013 International Conference on Electrical Machines and Systems (ICEMS). 2013; ():1697-1701.

Chicago/Turabian Style

Chang-Seok Park; June-Woo Jo; Tae-Uk Jung. 2013. "New active clamp technique for switching losses reduction of MIC systems." 2013 International Conference on Electrical Machines and Systems (ICEMS) , no. : 1697-1701.