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The uses of induction motor is ever-growing day by day because of its superiority and high efficiency over dc machine. So for wide range of use in the industry, this machine requires an efficient driver circuitry arrangement. Currently conventional Voltage Source Inverter (VSI) or Current Source Inverter (CSI) is dealing as key part in the field of induction motor driver circuit. These converters...
Large high power electric drives and utility applications necessitate advanced power electronics converter to maintain high and medium power loads with proper modulation system. There are many multilevel inverter topologies familiarizing with as a substitute of high and medium power load. A multilevel inverter should achieve and progress both high power ratings and the better performance with an expected...
Power crisis is one of the foremost concerning problem in Bangladesh. The gap between demand and production is increasing day by day. System loss, transmission loss and established connection to grid without upcoming load plan are main issues regarding this crisis. It is possible to control this crisis by taking some necessary steps such as system loss reduction, establishing efficient interconnection,...
Total Harmonic Distortion (THD) of a voltage or current signal causes power system losses, apparatus overheating and increases the power bills. This paper proposes the design and implementation of a transformer less single-phase inverter system that produces an output voltage of desired magnitude and frequency at a very lower THD. In ‘general inverter system’, a lower DC voltage is inverted into lower...
The demand of DC equipments are increasing day by day due to rapid development of power electronics devices and green energy. But most of the power generating systems engenders power in the form of AC. Consequently an efficient rectification system is strongly recommended to convert AC into DC. A close study of usual AC to DC conversion system arises a number of problems such as high THD, low power...
This paper presents a highly efficient electrical circuit for battery fed electric vehicles (BFEVs) which is an amalgamation of a PI controlled bi-directional DC-DC converter and a boost converter. The PI controlled isolated DC-DC bidirectional converter is designed to provide the desired battery voltage for dc motor control and to run the flow of power under both steady-state and ephemeral conditions...
Energy has always been a major necessity for the day-to-day human life. Unavailability of electricity is one of the major obstacle for economic development of Bangladesh. With the fluctuating grid power distribution system within the country most of the industries are not capable to utilize the national grid power for 24 hour production but rather have generating sets that fully run on diesel throughout...
FACTS devices such as Static Synchronous Compensator (STATCOM), Static Synchronous Series Compensator (SSSC), and Unified Power Flow Controller (UPFC) etc are designed for improving power quality in the transmission system. But these devices are now modified to be used in the distribution system rated from 1 to 38kV for the improvement of power quality and known as Custom Power Devices (CPD). The...
The demand for battery fed electrical vehicle (BFEV) is expected to ascend with the rapid depletion of the earth's petroleum resources. But the range of BFEV is still limited due to the limitation in energy conversion efficiency, energy recovery during braking operation and fast transient operation. So, the analysis and improvement of energy conversion system for BFEVs is strongly recommended. This...
`Fault current?? is the flow of abnormal current through an improper path due to electric faults which causes enormous damages. In HVAC transmission system, Fault current due to electric faults is too large which affects the overall power system including-Receiving & Sending end bus, Transmission system, Load and even also the Power Generation Unit. HVDC transmission system dramatically reduces...
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