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교수진
 프로그램소개 교수진
이름 최의민
전공 전력전자
 
TEL 02-970-6437
E-mail uch@seoultech.ac.kr
연구실 창학관 306호
 
프로필 다운로드
교수소개 돌아가기

학력

Ph.D. Aalborg University (Denmark)
M.S. 아주대학교
B.S. 아주대학교

주요 경력

Postdoctoral Researcher, Aalborg University
Partner Researcher, Grundfos Holding A/S

연구 분야

전력 변환 회로
신재생 에너지 발전(Wind, Solar)
모터 드라이브 (전기자동차, 철도차량 등)
Reliability

담당 교과목

전력전자공학
전자기학 1, 2
기초전자 설계 및 실험 1, 2

저널 논문

[1] U. M. Choi, S. Jørgensen, and F. Blaabjerg, “Impact of Cooling System Capacity on Lifetime of Power Module in Adjustable Speed Drives,” IEEE Emerging and Selected Topics on Power Electronics, vol. 7, no. 3, pp. 1768-1776. Sept. 2019.
[2] U. M. Choi, I. Vernica, and F. Blaabjerg, “Effect of Asymmetric Layout of IGBT Modules on Reliability of Motor Drive Inverters,” IEEE Trans. on Power Electronics, vol. 34, no. 2, pp. 1765-1772. Feb. 2019.
[3] U. M. Choi, J. S. Lee and F. Blaabjerg, “Effercts of Power Cycling Tests Condition and Test Strategy on Lifetime Estimation of Power Modules in Power Electronic Systems,” Microelectronics Reliability, vols. 100-101, Sep. 2019.
[4] J. S. Lee and U. M. Choi*, “Comparison of Heat-Pipe Cooling System Design Processes in Railway Propulsion Inverter Considering Power Module Reliability,” Energies, vol. 12, no. 24, Dec. 2019.
[5] K. Ma, U. M. Choi, and F. Blaabjerg, “Prediction and Validation of Cumulative Distribution Function for Power Semiconductor Devices with Mission Profiles in Motor Drive Application, IEEE Trans. on Power Electronics, vol. 33, no. 11, pp. 9843-9853. Nov. 2018.
[6] U. M. Choi, S. Jørgensen, F. Iannuzzo, and F. Blaabjerg, "Power cycling test of transfer molded IGBT modules by advanced power cycler under different junction temperature swings," Microelectronics Reliability, vols. 88-90, pp. 788-794. Sep. 2018.
[7] U. M. Choi, and F. Blaabjerg, “Separation of Wear-out Failure Modes of IGBT Modules in Grid-Connected Inverter Systems,” IEEE Trans. on Power Electronics, vol. 33, no. 7, pp. 6217-6223. July 2018.
[8] U. M. Choi, K. Ma and F. Blaabjerg, “Validation of Lifetime Prediction of IGBT Modules Based on Linear Damage Accumulation by Means of Superimposed Power Cycling Tests,” IEEE Trans. on Industrial Electronics, vol. 65, no. 4, pp. 3520-3529. Apr. 2018.
[9] U. M. Choi, F. Blaabjerg, and S. Jørgensen, “Power Cycling Test Methods for Reliability Assessment of Power Device Modules in respect to Temperature Stress,” IEEE Trans. on Power Electronics, vol. 33, no. 3, pp. 2531-2551. Mar. 2018.
[10] U. M. Choi, F. Blaabjerg, S. Munk-Nielsen, S. Jørgensen and B. Rannestad, “Reliability Improvement of Power Converters by Means of Condition Monitoring of IGBT Modules,” IEEE Trans. on Power Electronics, vol. 32, no. 10, pp. 7990-7997. Oct. 2017.
[11] U. M. Choi, F. Blaabjerg and F. Iannuzzo, “Advanced Power Cycler with Intelligent Monitoring Strategy of IGBT Module Under Test,” Microelectronics Reliability, vols. 76-77, pp. 522-526, Sep. 2017.
[12] U. M. Choi, F. Blaabjerg, and S. Jørgensen, “Study on Effect of Junction Temperature Swing Duration on Lifetime of Transfer Molded Power IGBT Modules,” IEEE Transactions on Power Electronics, vol. 32, no. 8, pp. 7990-7997. Aug. 2017.
[13] U. M. Choi, S. Jørgensen and F. Blaabjerg, “Advanced Accelerated Power Cycling Test for Reliability Investigation of Power Device Modules,” IEEE Transactions on Power Electronics, vol. 31, no. 12, pp. 8371-8386. Dec. 2016.
[14] U. M. Choi, J. S. Lee, F. Blaabjerg, and K. B. Lee, “Open-Circuit Fault Diagnosis and Fault-Tolerant Control for a Grid-Connected NPC Inverter,” IEEE Transactions on Power Electronics, vol. 31, no. 10, pp. 7234-7247. Oct. 2016.
[15] U. M. Choi, F. Blaabjerg, S. Jorgensen, F. Iannuzzo, H. Wang, C. Uhrenfeldt, and S. Munk-Nielsen, “Power cycling test and failure analysis of molded Intelligent Power IGBT Module under different temperature swing durations.” Microelectronics Reliability, vol. 64, pp. 403-408, Sep. 2016.
[16] J. S. Lee, U. M. Choi, and K. B. Lee, “Comparison of Tolerance Controls for Open-Switch Fault in a Grid-Connected T-Type Rectifier,” IEEE Trans. on Power Electronics, vol. 30, no. 10, pp. 5810-5820, Oct. 2015.
[17] U. M. Choi, F. Blaabjerg, F. Iannuzzo, and S. Jørgensen, “Junction temperature estimation method for a 600 V, 30A IGBT module during converter operation,” Microelectronics Reliability, vol. 55, no. 9-10, pp. 2022-2026, Aug.-Sep. 2015.
[18] U. M. Choi, F. Blaabjerg, and K. B. Lee, “Reliability Improvement of a T-Type Three-Level Inverter With Fault-Tolerant Control Strategy,” IEEE Transactions on Power Electronics, vol. 30, no. 5, pp. 2660-2673. May 2015.
[19] U. M. Choi, F. Blaabjerg, and K. B. Lee, “Study and Handling Methods of Power IGBT Module Failures in Power Electronic Converter Systems,” IEEE Transactions on Power Electronics, vol. 30, no. 5, pp. 2517-2533. May 2015.
[20] U. M. Choi, F. Blaabjerg, and K. B. Lee, “Control Strategy of Two Capacitor Voltages for Separate MPPTs in Photovoltaic Systems Using Neutral-Point-Clamped Inverters,” IEEE Transactions on Industry Applications, vol. 51, no. 4, pp. 3295-3303. July-Aug. 2015.
[21] U. M. Choi, F. Blaabjerg, and K. B. Lee, “Method to Minimize the Low-Frequency Neutral-Point Voltage Oscillations With Time-Offset Injection for Neutral-Point-Clamped Inverters,” IEEE Transactions on Industry Applications, vol. 51, no. 2, pp. 1678-1691. Mar.-Apr. 2015.
[22] U. M. Choi, K. B. Lee, and, F. Blaabjerg “Diagnosis and Tolerant Strategy of an Open-Switch Fault for T-Type Three-Level Inverter Systems,” IEEE Transactions on Industry Applications, vol. 50, no. 1, pp. 495-508. Jan.-Feb. 2014.
[23] U. M. Choi, J. S. Lee and K. B. Lee, “New Modulation Strategy to Balance the Neutral-Point Voltage for Three-Level Neutral-Clamped Inverter Systems,” IEEE Trans. on Energy Conversion, vol. 29, no. 1, pp. 91-100. Mar. 2014.
[24] U. M. Choi, H. H. Lee and K. B. Lee, “Simple Neutral-Point Voltage Control for Three-Level Inverters Using a Discontinuous Pulse Width Modulation,” IEEE Trans. on Energy Conversion, vol. 28, no. 2, pp. 434-443. Jun. 2013.
[25] U. M. Choi, and K. B. Lee, “Space vector modulation strategy for neutral-point voltage balancing in three-level inverter systems,” IET Power Electronics, vol. 6, no. 7, pp. 1390-1398. Aug. 2013.
[26] U. M. Choi, and K. B. Lee, “Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme,” Journal of Power Electronics, vol. 13, no. 2, pp. 243-249. Mar. 2013.
[27] U. M Choi, H. G. Jeong, K. B. Lee, and F. Blaabjerg, “Method for Detecting an Open-Switch Fault in a Grid-Connected NPC Inverter System,” IEEE Trans. on Power Electronics, vol. 27, no. 6, pp. 2726-2739, June 2012.

학술대회

[1] U. M. Choi, and F. Blaabjerg, “Effect of Asymmetric Layout of IGBT Modules on Reliability of Power Inverters in Motor Drive System,” in Proc. of AEPC 2018, pp. 193-197, Mar. 2018.
[2] U. M. Choi, and F. Blaabjerg, “Real-time condition monitoring of IGBT modules in PV inverter systems,” in Proc. of CIPS 2018, pp. 1-5, Mar. 2018.
[3] U. M. Choi, and F. Blaabjerg, “Asymmetric Power Device Rating Selection for Even Temperature Distribution in NPC Inverter,” in Proc. of ECCE 2017, pp. 4196-4201, Oct. 2017.
[4] K. Ma, U. M. Choi and F. Blaabjerg, “Reliability Metrics Extraction for Power Electronics Converter Stressed by Thermal Cycles,” in Proc. of ECCE 2017, pp. 3838-3842, Oct. 2017.
[5] U. M. Choi, K. Ma and F. Blaabjerg, “Lifetime Prediction of IGBT Modules based on Linear Damage Accumulation,” in Proc. of APEC 2017, pp. 2276-2281, Mar. 2017.
[6] K. Ma, U. M. Choi, and F. Blaabjerg, “Impacts of Ripple Current to the Loading and Lifetime of Power Semiconductor Device,” in Proc. of APEC 2017, pp. 2305-2311, Mar. 2017.
[7] U. M. Choi, F. Blaabjerg, and S. Jørgensen, “Effect of Junction Temperature Swing Durations on a Lifetime of a Transfer Molded IGBT Module,” in Proc. of ECCE 2016, Sep. 2016.
[8] U. M. Choi, F. Blaabjerg, S. Munk-Nielsen, S. Jørgensen and B. Rannestad, “Condition Monitoring of IGBT Module for Reliability Improvement of Power Converters,” in Proc. of ITEC Asia-Pacific 2016, pp. 602-607. June 2016.
[9] U. M. Choi, and F. Blaabjerg, “A novel active T-type three-level converter with open-circuit fault-tolerant control,” in Proc. of ECCE 2015, pp. 4765-4772. Sep. 2015.
[10] U. M. Choi, I. Trintis, F. Blaabjerg, S. Jørgensen, and M. L. Svarre, “Advanced Power Cycling Test for Power Module with On-line On-state VCE Measurement,” in Proc. of APEC 2015, pp. 2919-2924, Mar. 2015.
[11] U. M. Choi, F. Blaabjerg, J. S. Lee, and K. B. Lee, “Open-circuit fault diagnosis for a grid-connected NPC inverter with unity Power Factor,” in Proc. of APEC 2015, pp. 213-220, Mar. 2015.
[12] U. M. Choi, and F. Blaabjerg, “Junction temperature estimation for an advanced active power cycling test,” in Proc. of ICPE-ECCE Asia 2015, pp. 2944-2950, June 2015.
[13] U. M. Choi, F. Blaabjerg, and K. B. Lee, “Independent control strategy of two DC-link voltages for separate MPPTs in transformerless photovoltaic systems using neutral-point-clamped inverters,” in Proc. of APEC 2014, pp. 1718-1724, Mar. 2014.
[14] U. M. Choi, K. B. Lee and F. Blaabjerg, “Method to minimize the low-frequency neutral-point voltage oscillations with time-offset injection for neutral-point-clamped inverters,” in Proc. of ECCE 2013, pp. 4022-4029. Sep. 2013.
[15] U. M. Choi, and K. B. Lee, “Detection method of an open-switch fault and fault-tolerant strategy for a grid-connected T-type three-level inverter system,” in Proc. of ECCE 2012, pp. 4188-4195. Sep. 2012.
[16] U. M. Choi, H. G. Jeong and K. B. Lee, “Method of neutral-point voltage balancing for a grid connected NPC inverter system with time-offset variant estimating,” in Proc. of IPEMC 2012, pp. 499-504. Jun. 2012.
[17] U. M. Choi, K. B. Lee and F. Blaabjerg, “Diagnosis method of an open-switch fault for a grid-connected T-type three-level inverter system,” in Proc. of PEDG 2013, pp. 470-475. Jun. 2012.
[18] U. M. Choi, Kyo-Beum Lee, and Frede Blaabjerg, “Power electronics for renewable energy systems: Wind turbine and photovoltaic systems,” in Proc. of ICRERA 2012, Nov. 2012.
[19] H. H. Lee, U. M. Choi, and Kyo-Beum Lee “Neutral-Point Voltage Control for Grid-connected Three-Level Inverters using a Discontinuous Pulse Width Modulation,” in Proc. of VCCP2012, pp. 638-642, Oct. 2012.
[20] H. G. Jeong, U. M. Choi, Kyo-Beum Lee, “Control strategies for wind power systems to meet grid code requirements,” in Proc. of IECON 2011, pp. 1250 – 1255, Nov. 2011.
◾ 박진혁, 최의민, 이준석, Sinusoidal Third Harmonic Voltage Injection PWM Method for Applying the LCL Filter to Vienna Rectifiers, 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia), Busan, BEXCO, 2019최의민

저역서

K. B. Lee and U. M. Choi, “Fault and Diagnosis Systems in Power Converters,” in Advanced and Intelligent Control in Power Electronics and Drives, vol. 531, Springer, pp. 143-178, Jan. 2014. ISBN: 978-3-319-03400-3.

특허

[1] (Registration) Apparatus and Method for Fault Diagnosis of Switching Device in Neutral Point Clamped Inverter System, Korean Patent 10-1242250, Mar. 3, 2013.
[2] (Registration) Fault Switch Diagnosis Apparatus and Method of 3 Level T-Type Inverter, Korean Patent 10-1331028, Nov. 13, 2013.
[3] (Registration) Neutral Point Voltage Controller and Method of three-level Inverter Using DPWM, Korean Patent 10-1343428, Dec. 13, 2013.

기타(학회활동 등)

IEEE Power Electronics Transactions Second Prize Paper Award, 2017
Topic Editor in the Energies (2019 ~ present)
Guest Editor for Special Issue on "Reliability of Power Electronics Systems" in the Energies (2019)
Guest Associate Editor for Special Issue on "Robust and Reliable Power Electronics" in the CPSS Transactions on Power Electronics and Applications (2018)
Technical Adviser of Korea Railroad Research Institute (KRRI) (2018. 08 - 2018. 12, 2019. 08 - 2019. 11)
ESREF 2018, Committee Member of Track on Renewable Energies Reliability
Member of IEEE (Power Electronics and Industry Applications Societies)
Member of KIPE

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