Design and Implementation of a New Multilevel Inverter Employing Reduced Components

Abstract

This paper focuses on an implementation of new topology which can synthesize multi-level output voltage at the load terminals. The proposed inverter consists of two main parts; level generation part and polarity generation part. Level generation part is responsible for generating voltage levels at its end while; polarity generation part is a traditional H-bridge which is used to provide inversion of the output voltage levels. Single-phase seven-level inverter has been presented from the proposed multilevel inverter. This topology offers reduced number of switching components compared with many recent available topologies particularly for high number of levels. Due to the multi-level output voltage, low total harmonic distortion (THD), less circuit complexity, less cost and high efficiency can be obtained. A conventional PI controller is used for load voltage regulation to obtain output voltage near to sinusoidal. Computer-aided using the dSPACE_CP1103 controller and experimental setup are carried out to provide the validity and effectiveness of the proposed inverter.

A step‐up D‐type multilevel inverter topology with reduced components counts for renewable energy applications

“…Figure 4 presents the aspects of comparison between the proposed D-type MLI topology and the newly introduced MLIs topologies. [15][16][17][22][23][24][29][30][31][32] Figure 4A presents the comparison between the proposed topology and the other topologies considering the number of switches; the proposed topology presents its promising feature in using the reduced number of switches to build up the D-type MLI structure compared to the other topologies. This feature increases the topology's percentage of reliability by reducing the overall cost and power losses; on the other hand, the proposed topology presents a reduction in the number of circuit drives, which reduces the response time of the circuit and makes the system response fast.…”

“…Many topologies have been used an H-bridge to ensure the positive and negative half cycle. [14][15][16][17] However, using the H-bridge unit as a steering unit increases the system complexity because it uses many components in building up those topologies. The H-bridge problem has been solved in newly invented topologies that focused on eliminating the H-bridge unit; those topologies accept their names from the topology's shape, such as K-type topology in References 18,19, which both references ensure 13-Level in the output voltage waveform.…”

“…However, it is missing the reduction in the isolated DC sources, which increased the converter size and cost. Many topologies have been used an H‐bridge to ensure the positive and negative half cycle 14‐17 . However, using the H‐bridge unit as a steering unit increases the system complexity because it uses many components in building up those topologies.…”

Comparative Analysis between Two Different Control PWM Techniques Based on a Reduced-Component Multilevel Inverter

“…The illustration of a reduced-component multilevel inverter is shown in Fig. 1 as set out in [11], [12]. It has two circuits; the level circuit and the polarity circuit.…”

A Multi-Cell 21-Level Hybrid Multilevel Inverter Synthesizes a Reduced Number of Components With Voltage Boosting Property

“…These are the main issues that usually face the researchers in this field. In [21][22][23][24] the authors used an H-bridge unit as a polarity generation block of the output waveforms which, increasing the number of switches, and increasing the system complexity and size. In [10,11] The topologies didn't depend on the HB in the structure and used a unique loop for each level based on the proposed topologies' switching devices.…”