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Multilevel inverters are used in several applications such as renewable sources, industrial drives, laminators, blowers, fans, and conveyors based power generation. The proposed multilevel inverter with boost converter plays a major role to minimize power demand and scarcity also provides desired Peak voltage. It synthesizes the desired ac output waveform from dc sources. This project focuses on reducing...
One of the functional memories which stores the huge amount of data and returns the matching data address after comparing the input search data with the stored data. CAM has a single clock cycle throughput so it is faster than other search systems. CAM is also said to be as associative memory, associative storage or associative array. CAM is one type of search engine which used in associative computing,...
Adiabatic circuits have been one of the preferred designs for reducing overall power dissipation in a circuit. By adiabatic technique, power dissipation in PMOS network can be reduced to optimal rates and some of energy stored at load capacitance can be recycled instead of losing it in the form of heat. Here in the given paper, the efficient charge recovery logic (ECRL) has been used to design one...
This paper presents a novel approach for designing of quaternary logic SETMOS summation circuit, hybrid circuits consisting of SET & MOSFET. Various gates based on hybrid structure also presented & simulated. The simulated outcomes shows that these hybrid circuits appreciates some parameters such as power dissipation and speed as compared with pure SET or pure CMOS circuits. These logic gates...
Necessity of Multilevel Inverter is explained in this paper. Out of different types of topologies, Neutral Point Clamped Inverter is explained. Simulation is done using MATLAB software. Hardware implementation of five level inverter is designed. Design calculation and flowchart supporting 8051 microcontroller C Program is given. Also, Output waveform having five levels is given.
Solar energy is converted into electrical energy in effective manner. The main components of this solar power system are solar cell, dc to dc boost converters and inverter. The dc to dc converter used to boost or control the DC Voltage which is stored in the battery is fed to three phase Mosfet or IGBT driver, the output of the driver is connected to the Mosfet or IGBT which converts the DC supply...
The effect of non-idealities of a high frequency class D amplifier on it's output voltage is analysed. Firstly individual non-idealities like dead time, MOSFET body-diode drop, MOSFET ON-State drop, finite turn-on and turn-off time, series resistance of inductor and capacitor of output stage filter are taken one at a time and their effect on output voltage is analysed. Then effect of all of these...
A 30kVA SiC MOSFET inverter is designed and evaluated for 180°C ambient temperature operation. The entire inverter system is designed for high temperature (HT) except the DSP control circuit in room temperature environment. The power structure is designed using SiC MOSFETs and HT capacitors. The gate driver circuits with protections are also designed for the HT environment. The prototype has been...
This paper describes a Very High Frequency (VHF) converter made with three Class-E inverters and a single Class-DE rectifier. The converter is designed for the US mains (120 V, 60 Hz) and can deliver 9 W to a 60 V LED. The converter has a switching frequency of 37 MHz and achieves an efficiency of 89.4%. With VHF converters the power density can be improved and the converter described in this paper...
This paper introduces two efficiency improvement techniques for a grid-tied micro-inverter with current mode control zero voltage switching (ZVS) output stages. The first technique is dynamic dead time optimization wherein PWM dead times are dynamically adjusted as a function of load current. The second method is advanced phase-skipping control which distributes power on individual phases depending...
Diode-clamped multilevel inverters belong to one of the three main multilevel inverter topologies. To date, the single-phase versions of these inverters have been characterized as not having redundant states. Significantly, such states are useful for reducing device switching frequency during inverter operation, and hence for decreasing switching power losses and conducted electromagnetic interference...
This paper introduces the development and experimental performance of SiC-Based high power density inverter. The Power density of the developed inverter is about 70kW/litter in volumetric, 50kW/kg in gravimetric. The inverter is forced air cooled 2-level voltage source inverter. In order to achieve higher power density than conventional inverters, we need to reduce losses of inverters or improve cooling...
This paper presents a comparative evaluation of the loss and thermal performance of two advanced three-level inverter topologies, namely the SiC based T-Type and the Hybrid-NPC, both of which are aimed at reducing the high switching losses associated with a conventional Si based T-Type inverter. The first solution directly replaces the 1200V primary Si IGBT switches with lower loss 1200V SiC MOSFETs...
In a DC-AC system, some problems may threaten the reliability of the whole system, such as the shoot through issue and the failure of reverse recovery. Some methods are proposed to improve the reliability of the converters. The dual buck inverters can solve the above problems without adding dead time but the dual buck topology has a main drawback of low magnetic utilization which increases the volume...
This Paper presents a 15 level Asymmetrical Cascaded H bridge multilevel inverter Topology for Photovoltaic system. In this system Symmetrical and Asymmetrical Multilevel inverter (MLI) is utilized. In Symmetrical MLI, the DC source magnitude are equal ie., 50Vdc, 50Vdc & 50Vdc., where as in Asymmetrical MLI the DC source Magnitude are unequal and it is designed with binary form of voltage such...
This manuscript proposes a new topology for a 3-ϕ, multilevel inverter (MLI) with Common Mode Voltage (CMV) elimination. The presented MLI structure is realized with fewer switching power devices compared to the conventional MLI solutions for CMV elimination. A carrier based space vector modulation technique is used to operate the presented MLI. Reduced number of power semiconductors has the advantages...
This paper presents a low-cost high-efficiency photovoltaic (PV) micro-inverter with soft-switching capability. The system is based on a partial power processing resonant front end dc-dc stage, followed by an interleaved inverter stage. The proposed new soft-switching modulation scheme enables significant cost and volume reduction of the magnetics in the inverter stage. In order to shrink the magnetics,...
The reactive power in power converter with inductive load (motor drive e.g.) requires a current commutation path for the freewheeling current. Due to the high voltage drop of body diode of SiC MOSFET, a SiC Schottky diode is normally recommended as the anti-parallel freewheeling diode for SiC MOSFET to suppress the conduction of body diode. However, since the MOSFET can work as synchronous rectifier,...
In an inversion system, high reliability is one of the main targets pursuing. Some problems will threaten the reliability of the system, such as the shoot through issue and the failure of reverse recovery. The dual buck inverters can solve the above problems without adding dead time but the low magnetic utilization increases the volume and weight of the system. This paper firstly reviews the traditional...
MOSFETs built using wide band gap (WBG) materials offer numerous benefits to power electronic circuits. These benefits are quite apparent in applications requiring breakdown voltages ≥ 600V, where Silicon IGBTs are typically used due to their combination of high breakdown voltage and low conduction losses. Compared to Silicon IGBTs, WBG MOSFETs offer very short turn-ON and turn-OFF times, which reduce...
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