Y Vijaya Sambhavi, R Vijayapriya
School of Electrical Engineering, Vellore Institute of Technology, Vellore, India.
Heliyon. 2024 Oct 28;10(21):e39856. doi: 10.1016/j.heliyon.2024.e39856. eCollection 2024 Nov 15.
In the field of industrial drive applications, a neutral point clamped multilevel inverter (NPC MLI) is an extensively used option. The NPC MLI architecture involves more number of components for higher level and higher switching frequency operation. In this work paper, a novel three-phase 3-Level MLI is proposed evading the usage of clamping diodes and quadratic switches. Additionally, phase disposition pulse width modulation (PD-PWM) control technique is also employed for the proposed MLI. In comparison to NPC MLI, proposed MLI reduces the voltage switching stress as only one switch is operated per inverter leg. Another feature is that there is a considerable reduction in power losses as the current flows only through fewer elements. The proposed 3L inverter topology is explored thoroughly using the MATLAB simulation model. The evaluation of results is also demonstrated concerning the proposed PD-PWM technique by comparing its performance with the conventional sinusoidal PWM method. The Real-Time hardware-in-loop (HIL) simulator is also used to validate the simulation outcomes of the proposed model.
在工业驱动应用领域，中性点钳位多电平逆变器（NPC MLI）是一种广泛使用的选择。NPC MLI架构在更高电平及更高开关频率运行时需要更多数量的元件。在本工作论文中，提出了一种新型三相三电平MLI，避免了钳位二极管和二次开关的使用。此外，所提出的MLI还采用了相移脉宽调制（PD - PWM）控制技术。与NPC MLI相比，所提出的MLI降低了电压开关应力，因为每个逆变器桥臂仅一个开关动作。另一个特点是功率损耗显著降低，因为电流仅流过较少元件。利用MATLAB仿真模型对所提出的三电平逆变器拓扑进行了深入研究。通过将其性能与传统正弦脉宽调制方法进行比较，还展示了对所提出的PD - PWM技术结果的评估。实时硬件在环（HIL）模拟器也用于验证所提出模型的仿真结果。
