Electric drives are an essential part of more electric aircraft (MEA) applications with ever-growing demands for high power density, performance, and fault-tolerant capability. High-speed motor can fulfill those needs, but their speeds subject to the relatively low dc-link voltage adopted by MEA. The inverters thus expected efficiently effectively manage that limited voltage. A recently popular...

This report describes the various methods and circuits that have been developed to detect an islanding condition for photovoltaic applications and presents three methods that have been developed to test those methods and circuits. Passive methods for detecting an islanding condition basically monitor parameters such as voltage and frequency and/or their characteristics and cause the inverter to...

The proposed photovoltaic Micro Inverter is based on three port flyback with one port dedicated to power decoupling function so the decoupling capacitance is reduced and hence the long lifetime film capacitor is used. One of the two transformers and one capacitor is used for decoupling function. The decoupling capacitor functions as energy storage as well as snubber capacitor to recycle the tra...

Received May 11, 2013 Revised July 10, 2013 Accepted July 28, 2013 This paper cite comparative performance characteristics of Z-Source inverter fed IM drives with mostly used VSI & CSI fed IM drives. ZSI has both voltages buck and boost capabilities as they allow inverters to be operated in the shoot through state. It employs an exclusive Z-Source network (LC component) to dc-link the main inve...

The operation of digital circuits from power supply voltage of the order of 200mv or less imposes that, in general MOSFETs biased in the sub threshold regime, characterized by the exponential relation between the control voltages and the current. In this paper we analyze some of the basic building blocks of digital circuits operating in the sub threshold region. We analyze the basic CMOS invert...

This paper presents the most important multilevel inverter topologies like diode-clamped inverter (neutral-point clamped), capacitor-clamped (flying capacitor), and cascaded multicell( H-Bridge ) with separate dc sources. A Comparison of 5-level hybrid cascaded inverter with PWM method, 5 level diode clamped inverter & 5 level capacitor coupled inverter is also presented in this paper. This pap...