نتایج جستجو برای: unidirectional switches and harmonic elimination
تعداد نتایج: 16848886 فیلتر نتایج به سال:
In this paper proposed a new topology for cascaded multi level inverters. This structure consists of series connection of proposed basic unit blocks which are built with both unidirectional and bidirectional switches. The proposed structure has some advantages including: reduction in the number of switches and driver circuits, cost and installation area. Three algorithms for determination of dc...
We demonstrate an original solution to obtain a single-frequency ring laser coupled to an external passive nonresonant ring cavity, which plays the role of an optical diode. This system provides more output power than systems with an intracavity unidirectional device. To the best of our knowledge, this work marks the first demonstration of a unidirectional planar ring laser at 1.3 microm. Using...
the present study is paid to the evaluation of the welfare program of the unemployment insurance in iran. the main purpose which was the main reason for performing this thesis, was the unemployment insurance plan’s challenges in iran such as financial problems of this plan, prolongation of the credit receipt for some insured people, unemployment slow exiting from the unemployment insurance fund...
Multilevel inverter have been attracting increasing interest recently due to the increased power rating, improving harmonic performance, and reduced electromagnetic inference (EMI) emission. In this project, a genetic algorithm (GA) optimization technique is applied to 7-level cascaded multilevel inverter which determines optimum switching angles to eliminate 5 and 7th order harmonics. Genetic ...
the effect of the presence of perforations on he stresses of a plate is a problem which is of great interest in structural design and in the mathemattical theory of elasticity. among the many hole patterns that are likely to require consideration is the ring of equally spaced circular holes. the present worke investigates stress & strain analysis of a thin isotropic circular plate containing a ...
Abstract— Distributed energy resources systems are small power generation tools used to afford substitute solution or added enrichment of traditional electric power system. This paper is mainly concentrated on 1Ø multi-level inverter for Distributed Energy Resources. The objective of this paper is to reduce switches with increase in multi-level outputs which inherently reduces the cost & harmon...
To provide transmission-line voltage support, a static compensator (STATCOM) offers the optimal solution in terms of price, reliability, and dynamic performance. Simpler layout for switches, reduced component count and smaller dc-link capacitor values are the attractive features of the proposed topology over the diode clamped and cascaded multilevel converter. Two dc-link voltage sources with v...
In this paper a new configuration of the single-phase ninelevel voltage source inverter is described. The proposed inverter is based on modified H-bridge converter. To validate the proposed inverter, a low power prototype inverter has been designed and implemented. Instead of sixteen controlled switches as in conventional method, this topology requires only eight switches to obtain nine level o...
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