Ui-Min Choi, Kyo-Beum Lee, and Frede Blaabjerg, "Method to Minimize the Low-Frequency Neutral-Point Voltage Oscillations with Time-Offset Injection for Neutral-Point-Clamped Inverters," in Proc. ECCE Conf., Sep. 2013, pp. 4022–4029. > Paper

Paper

International Conference Ui-Min Choi, Kyo-Beum Lee, and Frede Blaabjerg, "Method to Minimize the Low-Frequency Neutral-Point Voltage Oscillations with Time-Offset Injection for Neutral-Point-Clamped Inverters," in Proc. ECCE Conf., Sep. 2013, pp. 4022–4029.

2013

본문

This paper proposes a method to reduce the low-frequency neutral-point voltage oscillations. The neutral-point voltage oscillations

are considerably reduced by adding a time offset to the three-phase turn-on times. The proper time offset is simply calculated

considering the phase currents and dwell time of small- and medium-voltage vectors. However, if the power factor is lower, there is

a limitation to eliminate neutral-point oscillations. In this case, the proposed method can be improved by changing the switching

sequence properly. Additionally, a method for neutral-point voltage balancing is also proposed. The change in switching frequency

by the proposed method and its effects on the outputs are negligible. Simulation and experimental results verify the validity and

feasibility of the proposed strategy.

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Paper 목록
번호	년도	논문명
62	2014	International Conference Kyoung-Gu Lee, June-Seok Lee, and Kyo-Beum Lee, "SPMSM Sensorless Control for Wide Speed Range Using Full-Order Flux Observer," in Proc. ICIT Conf., Feb./Mar. 2014, pp. 164–168.
61	2013	International Conference Hak-Seung Ro, Dong-Hee Kim, Hae-Gwang Jeong, and Kyo-Beum Lee, "A Fault Diagnosis and Tolerant Method for Switched Reluctance Motor Drives," in Proc. ECCE Conf., Sep. 2013, pp. 4294–4299.
열람중	2013	International Conference Ui-Min Choi, Kyo-Beum Lee, and Frede Blaabjerg, "Method to Minimize the Low-Frequency Neutral-Point Voltage Oscillations with Time-Offset Injection for Neutral-Point-Clamped Inverters," in Proc. ECCE Conf., Sep. 2013, pp. 4022–4029.
59	2013	International Conference June-Seok Lee, Kyo-Beum Lee, and Frede Blaabjerg, "Open-Switch Fault Detection Method of an NPC Converter for Wind Turbing Systems," in Proc. ECCE Conf., Sep. 2013, pp. 1696–1701.
58	2013	International Conference Yongsoo Cho, Dong-Hee Kim, Kyo-Beum Lee, Young Il Lee, and Joong-Ho Song, "Torque Ripple Reduction and Fast Torque Response Strategy of Direct Torque Control for Permanent-Magnet Synchronous Motor," in Proc. ISIE Conf., May 2013, pp. 1–6.
57	2013	International Conference Hae-Gwang Jeong, Hak-Seung Ro, and Kyo-Beum Lee, "A Control Scheme of the Low Voltage Ride Through in Wind turbines using a Direct Power Control Based on a Sliding Mode Control," in Proc. ISIE Conf., May 2013, pp. 1–6.
56	2013	International Conference Dong-Hee Kim, Hae-Gwang Jeong, and Kyo-Beum Lee, "Torque Ripple Minimization of Switched Reluctance Motors Based on Fuzzy Logic and Sliding Mode Control," in Proc. ISIE Conf., May 2013, pp. 1–6.
55	2013	International Conference Hak-Seung Ro, Hae-Gwang Jeong, and Kyo-Beum Lee, "Torque Ripple Minimization of Switched Reluctance Motor Using Direct Torque Control Based on Sliding Mode Control," in Proc. ISIE Conf., May 2013, pp. 1–6.
54	2013	International Conference Hyunseob Kim, Jungho Han, Young-Il Lee, Joong-Ho Song, and Kyo-Beum Lee, "Torque Predictive Control of Permanent-Magnet Synchronous Motor using Duty Ratio Prediction," in Proc. ISIE Conf., May 2013, pp. 1–5.
53	2012	International Conference Yongsoo Cho, Kyo-Beum Lee, Mengqiu Li, Joong-Ho Song, and Youngil Lee, "Novel Torque Predictive Control for a Permanent-Magnet Synchronous Motor with Minimum Torque Ripple and Fast Dynamics," in Proc. of APEC Conf., Mar. 2013, pp. 2253–2258.
52	2012	International Conference June-Seok Lee and Kyo-Beum Lee, "Modulation Technique to Reduce Leakage Current in Transformerless Photovoltaic Systems using a Three-Level Inverter," in Proc. APEC Conf., Mar. 2013, pp. 700–705.
51	2012	International Conference Hae-Gwang Jeong and Kyo-Beum Lee, "A Controller Design of Quick Chargers with a Current Offset Compensator," in Proc. VPPC Conf., Oct. 2012, pp. 695–699.
50	2012	International Conference Hae-Gwang Jeong and Kyo-Beum Lee, "Stability Improvement in an On-Board Battery Charger for Electric Vehicles," in Proc. VPPC Conf., Oct. 2012, pp. 690–694.
49	2012	International Conference Hyun-Hee Lee, Ui-Min Choi, and Kyo-Beum Lee, "Neutral-Point Voltage Control for Grid-connected Three-Level Inverters using a Discontinuous Pulse Width Modulation," in Proc. VPCC Conf., Oct. 2012, pp. 638–642.
48	2012	International Conference Ui-Min Choi and Kyo-Beum Lee, "Detection Method of an Open-Switch Fault and Fault-Tolerant Strategy for a Grid-Connected T-Type Three-Level Inverter System," in Proc. ECCE Conf., Sep. 2012, pp. 4188–4195.

Paper 목록

번호

년도

논문명

2014

International Conference

Kyoung-Gu Lee, June-Seok Lee, and Kyo-Beum Lee, "SPMSM Sensorless Control for Wide Speed Range Using Full-Order Flux Observer," in Proc. ICIT Conf., Feb./Mar. 2014, pp. 164–168.

2013

International Conference

Hak-Seung Ro, Dong-Hee Kim, Hae-Gwang Jeong, and Kyo-Beum Lee, "A Fault Diagnosis and Tolerant Method for Switched Reluctance Motor Drives," in Proc. ECCE Conf., Sep. 2013, pp. 4294–4299.

열람중

2013