전기 에너지 변환 연구실
Electric Energy Conversion Lab.
연구실 소개 및 연구분야
서울대학교 전력전자센터(Seoul national university Power Electronics Center, SPEC) 내 하정익 교수가 맡고 있는 전기 에너지 변환 연구실은 전기 에너지 변환을 위한 회로 설계 및 제어 알고리즘 개발에 대한 연구를 진행하고 있습니다. 친환경 자동차, 각종 가전 제품 및 산업에 널리 사용되는 전동기 구동 시스템의 설계와 제어부터 풍력, 태양광 발전과 같은 신재생 에너지, 최근 관심이 증가되고 있는 무선 전력 전송, GaN과 SiC와 같은 고속 스위칭 소자를 이용한 전력 변환 회로 개발에 대한 연구도 진행하고 있습니다.
▶ 연구 분야
- 일반 전력 전자 분야 (Power Electronics)
. 고효율 인버터 기술 및 회로 최적화 기술
. 센서 제거 및 저감 기술
. 통협형 회로 기기 제어 기술
. 고속 스위칭 DC/DC 컨버터
. 초고속 전동기 제어 기술
. 고성능 필터 디자인
- 동력변환 분야
. 전기자동차 및 전자 차량 제어의 에너지 변환 기술
. 차세대 가전 및 로봇의 에너지 변환 및 제어 기술
- 신재생 에너지 분야
. 풍력, 태양광, 화학 발전 기술
- 의료용 Micro robot 시스템 설계
. Magnetic propulsion을 이용한 의료용 로봇 구동 시스템 설계
▶ 연구 분야
- 일반 전력 전자 분야 (Power Electronics)
. 고효율 인버터 기술 및 회로 최적화 기술
. 센서 제거 및 저감 기술
. 통협형 회로 기기 제어 기술
. 고속 스위칭 DC/DC 컨버터
. 초고속 전동기 제어 기술
. 고성능 필터 디자인
- 동력변환 분야
. 전기자동차 및 전자 차량 제어의 에너지 변환 기술
. 차세대 가전 및 로봇의 에너지 변환 및 제어 기술
- 신재생 에너지 분야
. 풍력, 태양광, 화학 발전 기술
- 의료용 Micro robot 시스템 설계
. Magnetic propulsion을 이용한 의료용 로봇 구동 시스템 설계
최근 관심분야 및 주요 연구과제
▶ 최근 관심분야
- Small-sized Power Systems: Capacitorless inverter, dual motor drive
- Renewable Energy Conversion Systems
- Motor Control: Sensorless control, Dual inverter topology for EV/HEV, Single phase machine drive, High speed motor drive
- Medical micro robot drive
▶ 주요 연구과제
- 전해캡이 없는 전동기 구동 시스템 : LG 전자
- 태양광 발전용 Micro-inverter 시스템 : LG 전자
- 고속 전동기 제어 : LG 전자
- 단상 전동기 제어 : 삼성 전자
- 전기자동차 용 인버터 시스템 및 제어 기술 개발 : GM, 현대자동차, 만도
- 의료용 Micro robot 시스템 : 미래창조과학부
- Small-sized Power Systems: Capacitorless inverter, dual motor drive
- Renewable Energy Conversion Systems
- Motor Control: Sensorless control, Dual inverter topology for EV/HEV, Single phase machine drive, High speed motor drive
- Medical micro robot drive
▶ 주요 연구과제
- 전해캡이 없는 전동기 구동 시스템 : LG 전자
- 태양광 발전용 Micro-inverter 시스템 : LG 전자
- 고속 전동기 제어 : LG 전자
- 단상 전동기 제어 : 삼성 전자
- 전기자동차 용 인버터 시스템 및 제어 기술 개발 : GM, 현대자동차, 만도
- 의료용 Micro robot 시스템 : 미래창조과학부
주요 논문/특허
▶ 논문
- J. -S. Hong, S. Choi and J. -I. Ha, "Modulation Method of Series-Resonant Dual-Active Half-Bridge Converter for ZVS and Minimum RMS Current," in IEEE Transactions on Industry Applications, vol. 60, no. 1, pp. 694-708, Jan.-Feb. 2024, doi: 10.1109/TIA.2023.3324316.
- E. Chung and J. -I. Ha, "Impedance Matching Network Design for 6.78-MHz Wireless Power Transfer System With Constant Power Characteristics Against Misalignment," in IEEE Transactions on Power Electronics, vol. 39, no. 1, pp. 1788-1801, Jan. 2024, doi: 10.1109/TPEL.2023.3320199.
- H. -g. Choi, J. -I. Ha and K. Lee, "Ultra-Low Inductance PMSM Drive Using a DC Current Sensor," in IEEE Transactions on Industrial Electronics, vol. 71, no. 6, pp. 5597-5607, June 2024, doi: 10.1109/TIE.2023.3288203.
- B. R. Park, G. C. Lim, Y. Han and J. -I. Ha, "Saliency-Based Sensorless Control Using Current Derivative in IPMSM Drives With Single DC-Link Current Sensor," in IEEE Transactions on Industrial Electronics, vol. 71, no. 4, pp. 3394-3404, April 2024, doi: 10.1109/TIE.2023.3274858.
- J. -S. Hong, J. -I. Ha, S. Cui and J. Hu, "Topology and Control of an Enhanced Dual-Active Bridge Converter With Inherent Bipolar Operation Capability for LVDC Distribution Systems," in IEEE Transactions on Power Electronics, vol. 38, no. 10, pp. 12774-12789, Oct. 2023, doi: 10.1109/TPEL.2023.3297389.
- H. Kwon, J. Lee, J. Lee and J. -I. Ha, "Analytical Modeling and Design of 27.12 MHz Single-Switch DC–DC Converter With PCB Transformer," in IEEE Access, vol. 11, pp. 12742-12754, 2023, doi: 10.1109/ACCESS.2023.3242010.
- J. Choi, G. C. Lim, C. Hwang, B. R. Park and J. -I. Ha, "Feedback Gain Design of Induction Machine Full-Order Flux Observer," in IEEE Transactions on Industrial Electronics, vol. 70, no. 10, pp. 9870-9881, Oct. 2023, doi: 10.1109/TIE.2022.3217605.
- J. Lee, G. C. Lim and J. -I. Ha, "Pulse Width Modulation Methods for Minimizing Commutation Torque Ripples in Low Inductance Brushless DC Motor Drives," in IEEE Transactions on Industrial Electronics, vol. 70, no. 5, pp. 4537-4547, May 2023, doi: 10.1109/TIE.2022.3189104.
- S. Lee, G. Noh and J. -I. Ha, "Reconfigurable Power Circuits to Series or Parallel for Energy-Balanced Multicell Battery Pack," in IEEE Transactions on Industrial Electronics, vol. 70, no. 4, pp. 3641-3651, April 2023, doi: 10.1109/TIE.2022.3181412.
- J. -S. Hong, S. Lee and J. -I. Ha, "Control Method in Minimum Infinity-Norm Approach for Multicoil Magnetic Manipulation System," in IEEE Transactions on Magnetics, vol. 58, no. 1, pp. 1-9, Jan. 2022, Art no. 5600209, doi: 10.1109/TMAG.2021.3123093.
- E. Chung, J. -I. Ha, A. A. Bastami and D. J. Perreault, "Impedance Compressing Matching Network Based on Two-Port Network Analysis for Wireless Power Transfer System," in IEEE Journal of Emerging and Selected Topics in Industrial Electronics, vol. 3, no. 3, pp. 432-442, July 2022, doi: 10.1109/JESTIE.2021.3103679.
- G. Noh, J. Lee and J. -I. Ha, "Design and Analysis of Single-Inductor Power Converter for Both Battery Balancing and Voltage Regulation," in IEEE Transactions on Industrial Electronics, vol. 69, no. 3, pp. 2874-2884, March 2022, doi: 10.1109/TIE.2021.3065606.
- H. -G. Choi, K. Lee and J. -I. Ha, "Design and Control Method for Interior Permanent Magnet Synchronous Machine Drive With Capacitor Power Network," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 1, pp. 259-273, Feb. 2021, doi: 10.1109/JESTPE.2019.2958693.
- J. Lee and J. -I. Ha, "Temperature Estimation of PMSM Using a Difference-Estimating Feedforward Neural Network," in IEEE Access, vol. 8, pp. 130855-130865, 2020, doi: 10.1109/ACCESS.2020.3009503.
- G. Noh, J. Mace and J. -I. Ha, "Analysis and Design of 4-to-1 Capacitor-Stacking Balancer for Stacked Voltage Domain," in IEEE Access, vol. 8, pp. 110252-110263, 2020, doi: 10.1109/ACCESS.2020.3001598.
- K. Lee, H. -g. Choi and J. -I. Ha, "Power Capability Improvement of Interior Permanent Magnet Synchronous Motor Drives Using Capacitive Network," in IEEE Transactions on Industrial Electronics, vol. 67, no. 12, pp. 10109-10120, Dec. 2020, doi: 10.1109/TIE.2019.2962410.
- H. -G. Choi, K. Lee and J. -I. Ha, "Design and Control Method for a Surface-Mounted Permanent Magnet Motor Drive System With Passive Output Power Network," in IEEE Transactions on Power Electronics, vol. 35, no. 4, pp. 3891-3905, April 2020, doi: 10.1109/TPEL.2019.2937333.
- S. Kwon and J. -I. Ha, "Fault-Tolerant Operation Under Single-Phase Open in Mono Inverter Dual Parallel SMPMSM With Single Shaft," in IEEE Transactions on Power Electronics, vol. 34, no. 12, pp. 12064-12079, Dec. 2019, doi: 10.1109/TPEL.2019.2906431.
- K. -H. Lee and J. -I. Ha, "Resonant Switching Cell Model for High-Frequency Single-Ended Resonant Converters," in IEEE Transactions on Power Electronics, vol. 34, no. 12, pp. 11897-11911, Dec. 2019, doi: 10.1109/TPEL.2019.2906336.
- K. Lee, J. -I. Ha and D. V. Simili, "Analysis and Suppression of Slotting and Cross-Coupling Effects on Current Control in PM Synchronous Motor Drives," in IEEE Transactions on Power Electronics, vol. 34, no. 10, pp. 9942-9956, Oct. 2019, doi: 10.1109/TPEL.2019.2894265.
- Y. Han and J. -I. Ha, "Droop Control Using Impedance of Grid-Integrated DFIG within Microgrid," in IEEE Transactions on Energy Conversion, vol. 34, no. 1, pp. 88-97, March 2019, doi: 10.1109/TEC.2018.2861819.
- G. -H. Min and J. -I. Ha, "Inner Supply Data Transmission in Quasi-Resonant Flyback Converters for Li-Ion Battery Applications Using Multiplexing Mode," in IEEE Transactions on Power Electronics, vol. 34, no. 1, pp. 64-73, Jan. 2019, doi: 10.1109/TPEL.2018.2827390.
- Jaeyong Park; Sungho Jung; Jung-Ik Ha, “Variable Time Step Control for Six-Step Operation in Surface Mounted Permanent Magnet Machine Drives,” IEEE Transactions on Power Electronics, vol. 33, no. 2, pp.1501-1513, 2018.
- Yongsu Han and Jung-Ik Ha, “Control Method of Double Inverter Fed Wound Machine for Minimizing Copper Loss in Maximized Operating Area,” IEEE Transactions on Industrial Electronics, vol.64, no.10, pp.7700-7710, 2017.
- Euihoon Chung; Kyung-Hwan Lee; Yongsu Han; Jung-Ik Ha, “Single-Switch High-Frequency DC–DC Converter Using Parasitic Components,” IEEE Transactions on Power Electronics, vol. 32, no. 5, pp. 3651 – 3661, 2017.
- Jun Lee and Jung-Ik Ha, “Direction Priority Control Method for Magnetic Manipulation System in Current and Voltage Limits,” IEEE Transactions on Industrial Electronics, vol. 64, no. 4, pp. 2914 – 2923, 2017.
- Kyung-Hwan Lee, Euihoon Chung, Yongsu Han, and Jung-Ik Ha, “A Family of High-Frequency Single-Switch DC–DC Converters With Low Switch Voltage Stress Based on Impedance Networks,” IEEE Transactions on Power Electronics, vol. 32, no. 4, pp. 2913 – 2924, 2017.
- Woo Je Chang, Kyung-Hwan Lee, Heonjin Ha, Kyoungsuk Jin, Gunho Kim, Sun-Tae Hwang, Heon-min Lee, Seh-Won Ahn, Wonki Yoon, Hongmin Seo, Jung Sug Hong, Yoo Kyung Go, Jung-Ik Ha, and Ki Tae Nam, “Design Principle and Loss Engineering for Photovoltaic–Electrolysis Cell System,” ACS Omega, vol. 2, no.3, pp 1009–1018, 2017
- Hojoon Shin, Young-Ho Chae, Yeongrack Son, and Jung-Ik Ha, “Single-Phase Grid-Connected Motor Drive System With DC-Link Shunt Compensator and Small DC-Link Capacitor,” IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1268 – 1278, 2017.
- Kahyun Lee and Jung-Ik Ha, “Single-Phase Inverter Drive for Interior Permanent Magnet Machines,” IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1355 – 1366, 2017.
- Hojoon Shin, Yeongrack Son, and Jung-Ik Ha, “Grid Current Shaping Method with DC-Link Shunt Compensator for Three-Phase Diode Rectifier-Fed Motor Drive System,” IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1279 – 1288, 2017.
- Yeongrack Son and Jung-Ik Ha, “Discontinuous Grid Current Control of Motor Drive System With Single-Phase Diode Rectifier and Small DC-Link Capacitor,” IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1324 – 1334, 2017.
- J. -S. Hong, S. Choi and J. -I. Ha, "Modulation Method of Series-Resonant Dual-Active Half-Bridge Converter for ZVS and Minimum RMS Current," in IEEE Transactions on Industry Applications, vol. 60, no. 1, pp. 694-708, Jan.-Feb. 2024, doi: 10.1109/TIA.2023.3324316.
- E. Chung and J. -I. Ha, "Impedance Matching Network Design for 6.78-MHz Wireless Power Transfer System With Constant Power Characteristics Against Misalignment," in IEEE Transactions on Power Electronics, vol. 39, no. 1, pp. 1788-1801, Jan. 2024, doi: 10.1109/TPEL.2023.3320199.
- H. -g. Choi, J. -I. Ha and K. Lee, "Ultra-Low Inductance PMSM Drive Using a DC Current Sensor," in IEEE Transactions on Industrial Electronics, vol. 71, no. 6, pp. 5597-5607, June 2024, doi: 10.1109/TIE.2023.3288203.
- B. R. Park, G. C. Lim, Y. Han and J. -I. Ha, "Saliency-Based Sensorless Control Using Current Derivative in IPMSM Drives With Single DC-Link Current Sensor," in IEEE Transactions on Industrial Electronics, vol. 71, no. 4, pp. 3394-3404, April 2024, doi: 10.1109/TIE.2023.3274858.
- J. -S. Hong, J. -I. Ha, S. Cui and J. Hu, "Topology and Control of an Enhanced Dual-Active Bridge Converter With Inherent Bipolar Operation Capability for LVDC Distribution Systems," in IEEE Transactions on Power Electronics, vol. 38, no. 10, pp. 12774-12789, Oct. 2023, doi: 10.1109/TPEL.2023.3297389.
- H. Kwon, J. Lee, J. Lee and J. -I. Ha, "Analytical Modeling and Design of 27.12 MHz Single-Switch DC–DC Converter With PCB Transformer," in IEEE Access, vol. 11, pp. 12742-12754, 2023, doi: 10.1109/ACCESS.2023.3242010.
- J. Choi, G. C. Lim, C. Hwang, B. R. Park and J. -I. Ha, "Feedback Gain Design of Induction Machine Full-Order Flux Observer," in IEEE Transactions on Industrial Electronics, vol. 70, no. 10, pp. 9870-9881, Oct. 2023, doi: 10.1109/TIE.2022.3217605.
- J. Lee, G. C. Lim and J. -I. Ha, "Pulse Width Modulation Methods for Minimizing Commutation Torque Ripples in Low Inductance Brushless DC Motor Drives," in IEEE Transactions on Industrial Electronics, vol. 70, no. 5, pp. 4537-4547, May 2023, doi: 10.1109/TIE.2022.3189104.
- S. Lee, G. Noh and J. -I. Ha, "Reconfigurable Power Circuits to Series or Parallel for Energy-Balanced Multicell Battery Pack," in IEEE Transactions on Industrial Electronics, vol. 70, no. 4, pp. 3641-3651, April 2023, doi: 10.1109/TIE.2022.3181412.
- J. -S. Hong, S. Lee and J. -I. Ha, "Control Method in Minimum Infinity-Norm Approach for Multicoil Magnetic Manipulation System," in IEEE Transactions on Magnetics, vol. 58, no. 1, pp. 1-9, Jan. 2022, Art no. 5600209, doi: 10.1109/TMAG.2021.3123093.
- E. Chung, J. -I. Ha, A. A. Bastami and D. J. Perreault, "Impedance Compressing Matching Network Based on Two-Port Network Analysis for Wireless Power Transfer System," in IEEE Journal of Emerging and Selected Topics in Industrial Electronics, vol. 3, no. 3, pp. 432-442, July 2022, doi: 10.1109/JESTIE.2021.3103679.
- G. Noh, J. Lee and J. -I. Ha, "Design and Analysis of Single-Inductor Power Converter for Both Battery Balancing and Voltage Regulation," in IEEE Transactions on Industrial Electronics, vol. 69, no. 3, pp. 2874-2884, March 2022, doi: 10.1109/TIE.2021.3065606.
- H. -G. Choi, K. Lee and J. -I. Ha, "Design and Control Method for Interior Permanent Magnet Synchronous Machine Drive With Capacitor Power Network," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 1, pp. 259-273, Feb. 2021, doi: 10.1109/JESTPE.2019.2958693.
- J. Lee and J. -I. Ha, "Temperature Estimation of PMSM Using a Difference-Estimating Feedforward Neural Network," in IEEE Access, vol. 8, pp. 130855-130865, 2020, doi: 10.1109/ACCESS.2020.3009503.
- G. Noh, J. Mace and J. -I. Ha, "Analysis and Design of 4-to-1 Capacitor-Stacking Balancer for Stacked Voltage Domain," in IEEE Access, vol. 8, pp. 110252-110263, 2020, doi: 10.1109/ACCESS.2020.3001598.
- K. Lee, H. -g. Choi and J. -I. Ha, "Power Capability Improvement of Interior Permanent Magnet Synchronous Motor Drives Using Capacitive Network," in IEEE Transactions on Industrial Electronics, vol. 67, no. 12, pp. 10109-10120, Dec. 2020, doi: 10.1109/TIE.2019.2962410.
- H. -G. Choi, K. Lee and J. -I. Ha, "Design and Control Method for a Surface-Mounted Permanent Magnet Motor Drive System With Passive Output Power Network," in IEEE Transactions on Power Electronics, vol. 35, no. 4, pp. 3891-3905, April 2020, doi: 10.1109/TPEL.2019.2937333.
- S. Kwon and J. -I. Ha, "Fault-Tolerant Operation Under Single-Phase Open in Mono Inverter Dual Parallel SMPMSM With Single Shaft," in IEEE Transactions on Power Electronics, vol. 34, no. 12, pp. 12064-12079, Dec. 2019, doi: 10.1109/TPEL.2019.2906431.
- K. -H. Lee and J. -I. Ha, "Resonant Switching Cell Model for High-Frequency Single-Ended Resonant Converters," in IEEE Transactions on Power Electronics, vol. 34, no. 12, pp. 11897-11911, Dec. 2019, doi: 10.1109/TPEL.2019.2906336.
- K. Lee, J. -I. Ha and D. V. Simili, "Analysis and Suppression of Slotting and Cross-Coupling Effects on Current Control in PM Synchronous Motor Drives," in IEEE Transactions on Power Electronics, vol. 34, no. 10, pp. 9942-9956, Oct. 2019, doi: 10.1109/TPEL.2019.2894265.
- Y. Han and J. -I. Ha, "Droop Control Using Impedance of Grid-Integrated DFIG within Microgrid," in IEEE Transactions on Energy Conversion, vol. 34, no. 1, pp. 88-97, March 2019, doi: 10.1109/TEC.2018.2861819.
- G. -H. Min and J. -I. Ha, "Inner Supply Data Transmission in Quasi-Resonant Flyback Converters for Li-Ion Battery Applications Using Multiplexing Mode," in IEEE Transactions on Power Electronics, vol. 34, no. 1, pp. 64-73, Jan. 2019, doi: 10.1109/TPEL.2018.2827390.
- Jaeyong Park; Sungho Jung; Jung-Ik Ha, “Variable Time Step Control for Six-Step Operation in Surface Mounted Permanent Magnet Machine Drives,” IEEE Transactions on Power Electronics, vol. 33, no. 2, pp.1501-1513, 2018.
- Yongsu Han and Jung-Ik Ha, “Control Method of Double Inverter Fed Wound Machine for Minimizing Copper Loss in Maximized Operating Area,” IEEE Transactions on Industrial Electronics, vol.64, no.10, pp.7700-7710, 2017.
- Euihoon Chung; Kyung-Hwan Lee; Yongsu Han; Jung-Ik Ha, “Single-Switch High-Frequency DC–DC Converter Using Parasitic Components,” IEEE Transactions on Power Electronics, vol. 32, no. 5, pp. 3651 – 3661, 2017.
- Jun Lee and Jung-Ik Ha, “Direction Priority Control Method for Magnetic Manipulation System in Current and Voltage Limits,” IEEE Transactions on Industrial Electronics, vol. 64, no. 4, pp. 2914 – 2923, 2017.
- Kyung-Hwan Lee, Euihoon Chung, Yongsu Han, and Jung-Ik Ha, “A Family of High-Frequency Single-Switch DC–DC Converters With Low Switch Voltage Stress Based on Impedance Networks,” IEEE Transactions on Power Electronics, vol. 32, no. 4, pp. 2913 – 2924, 2017.
- Woo Je Chang, Kyung-Hwan Lee, Heonjin Ha, Kyoungsuk Jin, Gunho Kim, Sun-Tae Hwang, Heon-min Lee, Seh-Won Ahn, Wonki Yoon, Hongmin Seo, Jung Sug Hong, Yoo Kyung Go, Jung-Ik Ha, and Ki Tae Nam, “Design Principle and Loss Engineering for Photovoltaic–Electrolysis Cell System,” ACS Omega, vol. 2, no.3, pp 1009–1018, 2017
- Hojoon Shin, Young-Ho Chae, Yeongrack Son, and Jung-Ik Ha, “Single-Phase Grid-Connected Motor Drive System With DC-Link Shunt Compensator and Small DC-Link Capacitor,” IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1268 – 1278, 2017.
- Kahyun Lee and Jung-Ik Ha, “Single-Phase Inverter Drive for Interior Permanent Magnet Machines,” IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1355 – 1366, 2017.
- Hojoon Shin, Yeongrack Son, and Jung-Ik Ha, “Grid Current Shaping Method with DC-Link Shunt Compensator for Three-Phase Diode Rectifier-Fed Motor Drive System,” IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1279 – 1288, 2017.
- Yeongrack Son and Jung-Ik Ha, “Discontinuous Grid Current Control of Motor Drive System With Single-Phase Diode Rectifier and Small DC-Link Capacitor,” IEEE Transactions on Power Electronics, vol. 32, no. 2, pp. 1324 – 1334, 2017.
