Abstract This paper presents a new topology of drive circuitry for variable reluctance stepping motors (VRSM). This is used for improving the performance of stepper motors with time varying reluctance which are employed in computer systems and microcontroller and web technology appliances by modifying its time constant and thus, increasing its stepping rate. Therefore, the initial torque developed by the motor is high;... This paper presents a new topology of drive circuitry for variable reluctance stepping motors (VRSM). This is used for improving the performance of stepper motors with time varying reluctance which are employed in computer systems and microcontroller and web technology appliances by modifying its time constant and thus, increasing its stepping rate. Therefore, the initial torque developed by the motor is high; the switching from one coil to the next is faster than normal and consequently, the rotor moves as quickly as it should be. The circuitry discussed in this paper is connected directly to the motor windings and the motor power supply, and this circuitry is controlled by a digital system that determines when the switches are turned on or off. Read More Read Less

Abstract The growth of telecommunication leads to the economic growth in manifold for the country. In recent years when the user’s demand has changed significantly, the composition and structure of telecommunication industry has also changed a lot. It directly contributes in GDP, Government Revenue, and Employment, by lowering transaction costs, by providing faster access of information; it improved various services like health care,... The growth of telecommunication leads to the economic growth in manifold for the country. In recent years when the user’s demand has changed significantly, the composition and structure of telecommunication industry has also changed a lot. It directly contributes in GDP, Government Revenue, and Employment, by lowering transaction costs, by providing faster access of information; it improved various services like health care, education, banking, insurance aviation, transport and other sub sectors of the economy. On the other hand, it has forward and backward linkage with mainly Data Intensive Industries, IT hardware and software, electronic equipment industry, and infrastructure industry etc. Change in technology and user’s demands at micro and macro levels have also brought technological advancement in the telecommunication industry. Therefore, enhancement of mobile spectrum from 2G to 3G, 4G and beyond has created various opportunities and threats to different economic, social and technical segments. Read More Read Less