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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.

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