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Wind tunnels used for testing purposes help in analysing the forces, pressure fields and the flow patterns of air around a test specimen. This helps improving the specimen body so as to optimize the performance in the actual working model. The tests conducted are at high as well as low velocity to simulate the natural working environment when the body is in motion in the fluid. This involves maintaining...
The paper presents design and simulation of, one of the quantum reversible gates, the Feynman gate, using the single electron threshold logic gate. One of the most emerging areas in quantum computing is the application of reversible gates in computational circuits for increasing the computational efficiency. Here the presented approach combines the advantages of the single electron threshold logic...
This paper demonstrates the detailed design of carry look ahead adder with the single electron tunneling based threshold logic. Tunneling is a mechanism in which a single electron can cross a sandwiched structure of insulating layer between two conducting materials known as tunnel junction. The threshold logic works mainly on the basis of the comparison in between the threshold and the weighted sum...
Modeling of level process in various tanks and vessels is one of the most common problems in the process industry. In this paper, system identification process is attempted for hybrid tank process. The hybrid tank process is a classic example of a highly nonlinear system. For nonlinear systems, System identification provides a better alternative to find their system transfer function. First principle...
An artificial intelligence controller for three phase three level soft switched, phase shifted PWM(phase shift modulation) dc to dc converter is proposed for high voltage and high power applications. In which, it is analyzed that four switches in a leg where outer switch behaves as a zero voltage switching and inner switch behaves as a zero current switching. The performance is analyzed by simulation...
The rotor position is integrant information for vector control drive system of Permanent Magnet Synchronous Motor (PMSM). In this paper, the focus is on the rotor position of PMSM detecting by the resolver sensor. The outstanding features of this sensor are its robust structure and noise insensitivity. To extract speed from the output of resolver we need R/D demodulator circuit. A new Artificial Neural...
Distributed resources are finding increased penetration in developing countries like India. The increased acceptance of such resources is mainly due to their modularity, increased reliability, good power quality and environment friendly operation. These are currently being interfaced to the existing systems using voltage source inverters (VSC's). The control of such distributed resources is significantly...
An isolated Zeta converter is proposed as a power factor correction (PFC) converter with DC link voltage control for speed control of a permanent magnet brushless DC motor (PMBLDCM). The voltage source inverter (VSI) is used as an electronic commutator of PMBLDCM. The proposed converter performs the PFC action and DC link voltage control in single stage using only one controller. The current multiplier...
In this paper, a new 12 kW single stage modular ac-dc converter is presented with unity power factor for telecom power applications. The combination of three single phase modules and a virtual neutral terminal device is a powerful method to design a three-phase modular converter system with power factor correction. It is based on the principle of connecting three single-phase modules in a three-phase...
Doubly Fed Induction Generators (DFIG) has emerged as a suitable alternative for conversion of wind energy to grid quality energy under varying wind conditions. Often the control mechanism use large number of sensors and employ complex computations. Moreover, the reported control schemes for DFIG employing grid side converter (GSC) do not ensure a drawl of unity power factor (upf) sinusoidal current...
This, paper presents (i) several software reliability, growth models (SRGM) which tries to predict, quantitatively the failure, phenomena, in, an, Open, Source, Software, project over a period of time. Here, it is assumed that the number of failures during testing is dependent upon the number of instructions execution, (ii) in order to cater the, irregular state, of, bug-report, phenomena, on, the,...
This paper deals with a Cuk DC-DC converter as a single-stage power factor correction (PFC) converter for a permanent magnet brushless DC motor (PMBLDCM) fed through a diode bridge rectifier (DBR) from a single-phase AC mains. A three-phase voltage source inverter is used as an electronic commutator to operate the PMBLDCM driving an air conditioner compressor. The speed of the compressor is controlled...
This paper deals with the design and development of fuzzy logic based controller for Distribution Static compensator (DSTATCOM) applied to an isolated system. The controller is developed and simulated for a small diesel generator system feeding a variety of linear as well as non-linear loads. Fuzzy rules are developed and successively reduced at every step such that controller design is simplified...
This paper aims at a power factor corrected (PFC) buck bridge DC-DC converter for a permanent magnet brushless DC motor (PMBLDCM) for an air conditioner. This PFC converter is fed from a single-phase AC mains through a diode bridge rectifier (DBR) and connected to a voltage source inverter (VSI) feeding the PMBLDCM. The Speed of the proposed PMBLDCM drive is controlled to improve efficiency of the...
This paper discusses the application of Distribution Static Compensator (DSTATCOM) to a small distribution system supplied from 42.5kVA diesel generator. The isolated system is not supported from the grid and is prone to a variety of system disturbances and faults. The shunt compensator is modelled, simulated and its performance is studied under load perturbations. To meet the real power needs, a...
In this paper, a buck half-bridge DC-DC converter is used as a single-stage power factor correction (PFC) converter for feeding a voltage source inverter (VSI) based permanent magnet brushless DC motor (PMBLDCM) drive. The front end of this PFC converter is a diode bridge rectifier (DBR) fed from single-phase AC mains. The PMBLDCM is used to drive a compressor load of an air conditioner through a...
This paper deals with an application of the power balance theory in a voltage and frequency controller (VFC) of an autonomous wind power generation using an isolated asynchronous generator (IAG) feeding three-phase four wire loads. The reference generator currents are estimated using the power balance theory to control the voltage and frequency of IAG system. Three-leg voltage source converter (VSC)...
In this paper, an operation methodology of a STATCOM (static synchronous compensator) is proposed with constant dc link voltage. For achieving this objective, two sets of three-level 12-pulse VSCs are used which are operated at the fundamental frequency switching. The reactive power is controlled by the phase angle difference between the two sets of three-level 12-pulse VSCs. Detailed analysis is...
In many applications high-speed performance is required. For this purpose, conventional multi-carrier techniques are usually chosen, but this results in the lowering of spectrum efficiency. So, the principles of orthogonal frequency division multiplexing are used in such applications. This paper gives the details of the development of IFFT & FFT algorithms to be used in OFDM systems based on the...
This paper presents a STATCOM (static compensator) based voltage controller for an isolated asynchronous generator (IAG) driven by bio-gas, diesel engine and gasoline and feeding 3-phase 4-wire consumer loads. The proposed controller consists of an IGBT (Insulated Gate Bipolar junction Transistor) based voltage source converter (VSC) and capacitor at its DC link. The neutral point for the consumer...
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