No abstract

The advent of inexpensive power semiconductors and digital control platforms has generated an interest in machines like switched reluctance motor (SRM) which is known for its structural simplicity. In domestic sector, however, conventional type of single phase induction motor (SPIM) is still commonly used. Most domestic appliances use fractional kilowatt motors with ratings ranging from 200 W to 800 W. This paper investigates the performance of SRM for use in a domestic application as in a water lifting pump and compares with SPIM, which is being used presently. The analysis combines the versatility of Finite Element Method with the classical design procedures. It is clear from the results that SRM gives better performance, energy saving and is cost effective as compared to the present machine and hence is a better alternative for domestic applications, in view of energy conservation.

Trajectory corners generated while generation of a curve from curved fragments using micro-positioning X −Y stages poses serious limitations on their use for smooth motion trajectory applications. In this research, a controller along with its control algorithm is presented which uses a penalized curve fitting-based approach to steer low cost/ low resolution stepper motor driven stage motion so that the cornerization in the trajectory is minimized without any serious degradation to accuracy. The control algorithm is initially implemented in MATLAB to check its fidelity. Subsequently, a complete set up involving ARM-based controller, motor drivers and precision positioning stages is built in order to facilitate the working of the algorithm in real time. The set up is tested for CNC machining application, where material removal takes place in a precise manner according to the trajectory of X −Y positioning stages. A good match was found between simulation and experimental results in trajectory generation. It was further observed that the use of penalized spline trajectory reduces the cornerization in trajectory generation.

No abstract

No abstract

No abstract

No abstract

Improvement of efficiency in electrical machines for water lifting applications in agricultural sector results in large energy savings, which is very much important in the present scenario of energy crisis. Single and three phase induction motors are most commonly used in such applications. However, these machines consume more energy due to their low efficiencies. A comprehensive performance evaluation including the machine design, selection of converter topologies, method of control, practical implementation of drive system, and vibration analysis for an agriculture applications is not done so far. This paper discuses to design Switched Reluctance Motor suitable for use in agricultural applications. Select suitable drive systems for this motor, giving considerations to lower switching losses and easiness of control. To investigate suitable control strategies for the speed control of the motor. Experimental validation of the performances of the motor, along with the vibration analysis. A real time experiment is also conducted to demonstrate the suitability of Switched Reluctance Motor drive for water lifting application and finally, per year unit consumption of Single Phase Induction Motor and Switched Reluctance Motor are compared to prove the economic superiority of Switched Reluctance Motor.