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Graduate School of Ajou University
Department of Space Electronics Information Engineering
3. Theses(Master)
중성점 전압 리플 저감이 가능한 3-레벨 NPC 인버터의 새로운 DPWM 방법
- Alternative Title
- A New Discontinuous PWM Method of a Three-Level NPC Inverter for Neutral-Point Voltage Ripple Reduction
- Author(s)
- 유승종
- Alternative Author(s)
- Seungjong Yoo
- Advisor
- 이교범
- Department
- 일반대학원 우주전자정보공학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2016-02
- Language
- kor
- Keyword
- PWM; DPWM; 3-레벨 NPC 인버터
- Alternative Abstract
- A new pulse width modulation (PWM) strategy which is an alternative approach of the discontinuous PWM (DPWM) for a three-level neutral-point-clamped (NPC) inverter is proposed in this paper. A three-level NPC inverter is completely mature and very well established topology in high-power applications. However, the three-level NPC inverter has the inherent problem of neutral-point voltage unbalancing due to the split dc-link capacitors. This structure can cause the large neutral-point voltage ripple. Furthermore, output currents of the three-level NPC inverter can be distorted by the neutral-point voltage ripple. Since the influence of the neutral-point voltage ripple to output, it must be controlled. In this paper, a new DPWM method using two different offsets for the neutral-point ripple reduction is proposed and the effectiveness of the proposed DPWM method is verified by using the simulation and the experimental results.
- Fulltext
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- Graduate School of Ajou University > Department of Space Electronics Information Engineering > 3. Theses(Master)
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