In this study, a fault diagnostic system in a multi-level inverter using a MLP network is developed. Using a mathematical model, it is difficult to diagnose a Multilevel-Inverter Drive (MLID) system, because MLID system complexity has a non-linear factor and it consist of many switching devices. Therefore neural network classification is applied to fault diagnosis of MLID system. Multilayer per...

In this paper, a control method for inverter air conditioner is presented, which is to use evaporating pressure as middle-target via fuzzy method. It is a method to control in cascade stage. Simulation results of performance of the control method, comparing with a traditional fuzzy method, were obtained.

 Traditional 2-level high-frequency pulse width modulation (PWM) inverters for motor drives have several problems associated with their high frequency switching which produces common-mode voltage and high voltage change (dV/dt) rates to the motor windings. Multilevel inverters solve these problems because their devices can switch at a much lower frequency. Two different multilevel topologies a...

 Traditional high-frequency pulse width modulation (PWM) inverters for motor drives have several problems associated with their high frequency switching which produces high voltage change (dV/dt) rates. Multilevel inverters solve these problems because their devices switch at the fundamental frequency. Two different multilevel topologies are identified for use as a converter for electric drive...

This paper focuses on developing a low cost and a low harmonic traditional three level inverter (H-Bridge) using pulse pattern. Multilevel inverter as compared to traditional three level inverters have advantages like low harmonic contents and low electromagnetic interference (EMI) outputs and can operate on several voltage levels. The drawbacks includes: The requirement of isolated power suppl...

This paper intmduces the circuit and PWM control strategies of the Neutral-Point-Clamped (NPC) inverter and Cascade-Inverters with Separate DC Source (CISDS), analyzes and compares their advantages and disadvantages. A new type of Parallel Connected NPC inverter (PCNPCI) is proposed here. Based on inherited all merits of the three-level structures, only added very few components, it can produce...

This paper presents asymmetrical cascaded multilevel inverter (ACMLI) approach for high voltage and high power output applications. It is based on the cascade connection of the H-bridge inverter cells. Now ever by the supplies which are in GP with different ratios like 2,3,etc. The proposed configuration is shown for 27 level inverters with symmetrical step control, optimization angle control a...

This paper deals single phase 27-level multilevel inverter topology for DER’s-based DC/AC conversion system. This work mainly focuses on cascaded MLI using three unequal dc sources in order to produce twenty seven-level output. In this study, a high step-up converter is introduced as a front-end stage to improve the conversion efficiency of conventional boost converters and to stabilize the out...

In this paper a novel symmetric multilevel converter structure based on cascaded converter family is proposed. This inverter is likely to be used in low/medium voltage applications. The proposed topology is analyzed and then compared with conventional multilevel cascade converters. Comparison depicts the proposed inverter superiority over the conventional inverters. In this topology, all the de...