This paper presents a method to improve the quality of input-output currents in a three-level neutral-point clamped (NPC) inverter
with small direct current-link (DC-link) capacitor systems. The inverter systems with the small DC-link capacitors have several
advantages in terms of cost, volume, life-time, and reliability when compared to inverters that use large DC-link capacitors. However,
there are problems with respect to the deterioration of the input current quality and a severe ripple of neutral-point voltage (NPV),
which can cause an aggravated output current. To mitigate these issues, an additional circuit is applied for the input current shaping
and a compensation algorithm is applied to reduce the ripple voltage of NPV. The effectiveness of the proposed design and control
method is verified with various simulation and experimental results.
- 143.pdf (5.8M) 27회 다운로드 | DATE : 2019-12-08 20:55:58