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Present paper demonstrates the effectiveness of the predictive deadbeat current control for Permanent Magnet (PM) Brushless (BL) DC motor drive in injection of square-wave phase current even at higher speed as compared to conventional PI controller employed for phase current control. Effectiveness has been demonstrated in terms of capability of minimizing current ripples and torque ripples ensuring...
In an inevitable changing world where our ecology is deteriorating and renewable resource is at its critical stage left us with only one option: “Go Green”. It postulates to design energy-efficient and economic internet equipment, albeit a trade-off between performances versus power saving. But it is the demand of time to adore power saving rather performance for the sustainable and green earth. As...
Present paper utilizes the concept of stationary plane based control approach for Permanent Magnet (PM) Brushless (BL) DC motor to ensure proper injection of phase currents. Depending on the speed of the motor falling in low or high speed zone, current trajectory deviates from the regular hexagon nature. Trajectory of the current vectors are forced to follow the regular hexagon by applying the most...
In this paper, a novel design of square patch antenna with a switchable polarization sense. The propose structure is reconfigurable patch antenna with polarization states being switched among linear polarization (LP), left-hand circular polarization (LHCP) and right-hand circular polarizations (RHCP). This antenna structure has four L-shaped slots on the ground plane, and the Circular Polarization...
In this paper, a novel design of an Octagonal shape micro strip patch antenna with switchable slots (PASS)structure is proposed to achieve polarization diversity. Two orthogonal slots are incorporated into the patch and two p-i-ndiodes are utilized to switch the slots on and off. By turning the diodes on or off, this antenna can radiate with linear and circular polarization, either right hand circular...
This paper analyzes the torque performance achievable from a three-phase PM BLDC drive under a fault of the VSI supplying the motor. Various types of fault are considered such as one leg open, one switch open and one switch shorted. Remedial control strategies for the healthy devices of the VSI are envisaged, that make the drive operating even if in a degraded way. The resulting torque performances...
In this paper, a novel compact ultra wideband (UWB) frequency-band reconfigurable antenna with seven switchable states including an ultra wideband (UWB) state, three narrowband states, one dual-band state and one triple band state is presented. In ultra wide band (UWB) state, antenna yields an impedance bandwidth of 2.54 to 11.71 GHz with return loss S11
This paper presents an agent-based model to select an investment portfolio with a restriction on the number of stocks in it. Daily movements of all the stocks in the market for the past few years are assumed to be available. The scheme deploys a federally structured consortium of agents in the stock market at the start of the historical period. Each agent starts with a pseudorandom portfolio and follows...
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