Design, Analysis and Performance Improvement of Three Phase Induction Motor

Abstract

Electrical motors are the most popular machines used in commercial and industrial applications. Electrical motors are an important part of any electrical system because they consume about 65% to 70% of all electricity generated. They offers reasonable performance, low maintains, robust construction, a manageable torque-speed curve, stable operation under load and satisfactory efficiency. The first goal of this project is to design induction motor by conventional method. After that CAD programming is carried out for the whole design of Induction Motor. On the basis of CAD program, detailed FE analysis is carried out to validate CAD program. It is always desirable to achieve higher operational efficiency. So in this project the refinement in conventional induction motor design is carried out to improve motor efficiency and that is validated in FE software also. PWM inverter-fed induction motor drives are used in many industrial and commercial applications. PWM inverter provides many benefits including improved speed control of induction motor, reduced energy consumption and extended diagnostics. The power supplied to the motor by a PWM inverter has some adverse effects like damage in insulation, harmonic distortion, temperature rise, damage in bearing. To overcome this, it is necessary to modify the design of conventional induction motor for PWM frequency converter. So, certain modifications are suggested to improve performance of induction motor which is energized from inverter.