In this paper performance characteristic of two levels and five levels inverter fed induction motor drive are compared. Open loop control of Induction motor (IM) is used in both inverter schemes. Comparison of both schemes has been done in terms of THD in their line current. Steady state response of speed, current and torque in induction motor is also compared for both control schemes. Models are developed for SPWM and Multilevel inverter fed induction motor using Xilinx.

Abstract:Here in the proposed work the main focus is done on FFT analysis of output voltage of cascade H-bridge multilevel inverter employing selective harmonic elimination method. In selective harmonic elimination, a particular order of harmonic is selected and based on it, width of pulse is decided so that output voltage will be free from that harmonic [1]. Also focus is done on improving the efficiency of the multilevel inverter and quality of output voltage waveform. Selective Harmonics Elimination method is used to reduce the Total Harmonics Distortion (THD) value and to eliminate the lower order harmonics [2]. This topology is suitable for any number of levels. It reduces cost and complexity hence it is opt for industrial applications. In this paper fifth and seventh harmonics have been eliminated. Simulation work is done using the MATLAB software and experimental results have been presented to validate the theory.

The crane hook mostly subjected to failure due to accumulation of large amount of stresses which can eventually lead to its failure. Failure of a crane hook mainly depends on three major factors i.e. dimension, material, overload. The design of crane hook has been carried out. To minimize the failure of crane hook, the stress occurred in it must be studied Generally, the design of the hook is done for the different materials like SAE-AISI 1040, ASMT GRADE 60, Forged steel, wrought iron, Aluminium alloy, High strength low alloy steel, and Crome steel but I want to use the material of crane hook as a Niobium Micro alloying Steel. And analyse the all parameters of other materials with Niobium Micro alloying Steel. Pro-E Wildfire 5.0 software is used for modelling the crane hook and ANSYS software used to find out the stresses induced in it. This result helps us for determining of stress in existing model. By predicting the stress concentration area, the hook working life increase and reduce the failure stress

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The crane hook mostly subjected to failure due to accumulation of large amount of stresses which can eventually lead to its failure. Failure of a crane hook mainly depends on three major factors i.e. dimension, material, overload. The design of crane hook has been carried out. To minimize the failure of crane hook, the stress occurred in it must be studied Generally, the design of the hook is done for the different materials like SAE-AISI 1040, ASMT GRADE 60, Forged steel, wrought iron, Aluminium alloy, High strength low alloy steel, and Crome steel but I want to use the material of crane hook as a Niobium Micro alloying Steel. And analyse the all parameters of other materials with Niobium Micro alloying Steel. Pro-E Wildfire 5.0 software is used for modelling the crane hook and ANSYS software used to find out the stresses induced in it. This result helps us for determining of stress in existing model. By predicting the stress concentration area, the hook working life increase and reduce the failure stress