Faculty/Research
Research Groups
Power Electronics Laboratory (EEPEL)
Research Area : 전기에너지 시스템
- http://eepel.snu.ac.kr
- Tel. 02-880-7251 / Fax. 02-878-1452
- Room 602 B301
About the Laboratory & Research Area
- In the late 1960s, Power Electronics Laboratory was founded by the late professor Min-Ho Park. Since 1991, under the leadership of professor Seung-Ki Sul, 6 PhD, 6 master's courses students, a foreign postdoctoral researcher, 2 intern undergraduated senior students have been researching on electric motor drive and power conversion system such as AC-DC, AC-AC etc. In these fields, our Lab. has carried out a lot of projects with foreign companies as well as domestic companies, and achieved excellent results. Especially by commercializing our research results through sponsor companies, we are directly contributing to domestic and international sponsoring industries. Therefore, most of students who graduated from our laboratory have been leading an advance of power electronics in industry and academia. Like this, our lab has been well known as the leading technology research group at home and abroad. Recently due to emerging environmental issues, power conversion research related to green technology has been received much attention, because power conversion plays an important role in renewable energy industry. Study on this field is actively ongoing in our Lab. Furthermore, AC motor drive system including Hybrid/Electric Car, electric propulsion ship etc. also have been researched for over ten years. Through this study, 3 doctors who graduated from our Lab were employed in GM Advanced Technology Center, USA. Also, we annually give a chance to study abroad for a year to 2 graduated students investigating power electronics, by supporting scholarship based on the fund, five hundred million, which the late professor Min-Ho Park donated.
▶ Research Area
- New Ac-AC, AC-DC converter topology
- Motor drive algorithm, in particular the best technology and original patent reserved in terms of position sensorless AC motor drive
- Power Conversion System (PCS) design and control, Power Quality(PQ) improvement for renewable energy
- Modular Multilevel voltage source Converter(MMC) for high voltage DC transmission system (HVDC)
- Converter and System controlled by FPGA, DSP Research Interests & Projects
- ▶ Recent main research project
- AC/DC/AC converter system having regenerative capability for multi megawatt medium voltage motor drive
- High performance sensorless algorithm for ac motor drive
- Fault detection algorithm applicable to Hybrid/Electric Car
- Grid connected photovoltaic converter system
- Control algorithm and PCS development for grid connected multi megawatt Energy Storage System
- PQ improvement with MMC Journals & Patents
- - Typical papers
[1] Jae-Jung Jung, Hak-Jun Lee, Seung-Ki Sul
Control strategy for improved dynamic perform ance of variable-speed drives with modular Mu ltilevel converter,
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONIC, 2015. 6, Volume: 3, Issue: 2, Pages: 371 - 380
[2] Myoungho Kim, Seung-Ki Sul, Junggi Lee
Compensation of current measurement error for current-controlled PMSM drives,
IEEE Transactions on Industry Applications, 2014. 10, Volume: 50, Issue: 5, Pages: 3365 - 3373
[3] Yong-Cheol Kwon, Sungmin Kim, Seung-Ki Sul
Six-Step operation of PMSM with instantaneous current control,
IEEE Transactions on Industry Applications, 2014. 8, Volume: 50, Issue: 4, Pages: 2614 - 2625
[4] Young-Doo Yoon, Seung-Ki Sul
Sensorless control for induction machines based on square-wave voltage injection,
IEEE Transactions on Power Electronics, 2014. 7, Volume: 29, Issue: 7, Pages: 3637 - 3645
[5] Sehwa Choe, Eunsoo Jung, Seung-Ki Sul
Sensorless control of synchronous machine with an inverter integrated rotor,
IEEE Transactions on Industry Applications, 2014. 7, Volume: 50, Issue: 4, Pages: 2584 - 2591
[6] Yongsoon Park, Seung-Ki Sul
Sensorless control method for PMSM based on F requency-adaptive disturbance observer,
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONIC, 2014. 6, Volume: 2, Issue: 2, Pages: 143 - 151
[7] Yong-Cheol Kwon, Seung-Ki Sul, Baloch, N.A., Murakami, S., Morimoto, S.
Design and control of IPMSM sensorless drive for mechanical rotor position estimation capability,
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONIC, 2014. 6, Volume: 2, Issue: 2, Pages: 152 - 158
[8] Yongsoon Park, Seung-Ki Sul
Implementation schemes to compensate for inverter nonlinearity based on trapezoidal voltage,
IEEE Transactions on Industry Applications, 2014. 3 Volume: 50, Issue: 2, Pages: 1066 - 1073
[9] Yongsoon Park, Seung-Ki Sul, Woo-Chull Kim, Hyun-young Lee
Phase-Locked loop based on an observer for grid synchronization,
IEEE Transactions on Industry Applications, 2014. 3, Volume: 50, Issue: 2, Pages: 1256 - 1265
[10] Hyun-Sam Jung, Seung-Jun Chee, Seung-Ki Sul, Young-Jae Park, Hyun-Soo Park, Woo-Kyu Kim
Control of three-phase inverter for AC motor drive with small DC-link capacitor fed by single-phase AC source,
IEEE Transactions on Industry Applications, 2014. 3, Volume: 50, Issue: 2, Pages: 1074 - 1081
[11] Wook-Jin Lee, Seung-Ki Sul
DC-Link voltage stabilization for reduced DC- link capacitor inverter,
IEEE Transactions on Industry Applications, 2014. 1, Volume: 50, Issue: 1, Pages: 404 - 414
[12] Yongsoon Park, Seung-Ki Sul, Chun-Ho Lim, Woo-Chull Kim, Seong-Hun Lee
Asymmetric control of DC-link voltages for separate MPPTs in three-level Inverte rs,
IEEE Transactions on Power Electronics, 2013. 6, Volume: 28, Issue: 6, Pages: 2760 - 2769
[13] Hak-Jun Lee, Sungho Jung, Seung-Ki Sul
A current controller design for current source inverter-fed AC machine drive Sys tem,
IEEE Transactions on Power Electronics, 2013. 3, Volume: 28, Issue: 3, Pages: 1366 - 1381
[14] Sungmin Kim, Young-Doo Yoon, Seung-Ki Sul, Ide, K.
Maximum torque per ampere (MTPA) control of an IPM machine based on signal injection considering inductance saturation,
IEEE Transactions on Power Electronics, 2013. 1, Volume: 28, Issue: 1 , Pages: 488 – 497
- Typical patents
No Inventors Title Registration Number Registered Country Date
1 Jung Ik Ha, Sung Min Kim, Seung-Ki Sul, Yong Su HAN VARIABLE SPEED INDUCTION MOTOR WITH SINGLE EXTERNAL POWER SUPPLY AND CONTROL METHOD 1012371230000
US20130057195 A1
Korea
U.S.A
20130219
20130301
2 Dong-Cheol Lee, Cha-Seung Jeon, Jea-Cheol Lee, Byeong-Uk Min, Seung-Ki Sul, Anno Yoo MOTOR, MOTOR CONTROL APPARATUS AND CONTROL ALGORITHM 1014433880000 대한민국 20140916
3 Seung-Ki Sul, Yongsoon Park, Byeong-Heon Kim PHOTOVOLTAIC APPARATUS AND MPPT METHOD 1014347890000 Korea 20140820
4 Dong Hwan Lee, Young Jae Park, Yong Soon Park, Seung-Ki Sul APPARATUS AND METHOD OF ESTIMATING INDUCTANCE OF PERMANENT MAGNET SYNCHRONOUS MOTOR 8786230 Korea
PCT
20140722
5 Dong-Cheol Lee, Cha-Seung Jeon, Jea-Cheol Lee, Byeonguk Min, Seung-Ki Sul, Anno Yoo MOTOR, MOTOR CONTROL APPARATUS AND CONTROL METHOD 1014005390000 Korea 20140521
6 Byeong-Heon Kim, Yongsoon Park, Seung-Ki Sul, Chunho Im, Woo-Chul Kim, Seung-Hoon Lee 3PHASE POWER SUPPLY APPARATUS AND CONTROL METHOD 10-1359761 Korea 20140129
7 Yongsoon Park, Seung-Ki Sul,, Chunho Im, Seung-Hoon Lee, Giseon Lee ASYMMETRIC CONTROL OF DC-LINK VOLTAGES FOR SEPARATE MPPTS IN THREE-LEVEL PV INVERTERS 10-1351650 Korea 20140108
8 Seung-Ki Sul, Jung-Ik Ha, Eunsoo Jung SYNCHRONOUS MACHINE WITH AN INVERTER INTEGRATED ROTOR AND CONTROL METHOD 1015016070000 Korea 20150305