The multi-level inverter system is mostly used in ac drives, when both reduced harmonic contents and high power are required. In this paper a new topology of multilevel inverter is introduced. This type has many steps with less power electronic switches. Due to the less number of switches the cost of the inverter is very less and also less installation area is required. Firstly, we describe briefly the structural parts of the inverter then switching strategy and operational principles of the proposed inverter are explained and operational topologies are given. Simulation is performed using MATLAB SIMULINK. Various conventional PWM techniques are applied to the circuit such as PDPWM, PODPWM, APODPWM, VFPWM and COPWM. By comparing among the conventional PWM techniques, PDPWM provide the less THD value and COPWM provide a higher fundamental RMS output voltage.

Free transverse vibrations of rods which are axially constrained at ends and initially loaded with an axial force at an intermediate point are discussed. The theoretical developments are based on Timoshenko equations and explicit solutions and results have been obtained for hinged−hinged and fixed−fixed beams. Various interesting and new aspects, such as the influence of the magnitude and location of axial forces on the frequency spectrum, are evident from the numerical results. Subject Classification: 40.22.

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<span>This paper analyzes a family of high step up single switch switched capacitor boost converters and Z-source/quasi Z-source dc-dc converters to provide high output dc voltage gain, a proper choice for photovoltaic applications. The operating principles, parameters design guideline of these converters are presented along with simulation results.</span>

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