Rajasthan Technical University

About: Rajasthan Technical University is a education organization based out in Kota, Rajasthan, India. It is known for research contribution in the topics: Photovoltaic system & PID controller. The organization has 716 authors who have published 1084 publications receiving 4530 citations. The organization is also known as: RTU.

Comparative analysis of hybrid electric vehicle FED through DC-DC converter and operated with battery and ultracapacitor

Abstract: Electrical vehicles are the really important innovation for improved environmental conditions in the world Electrical vehicle involves many hardware inside like battery pack Battery pack has significant role for getting distance and it should be used carefully Therefore, it is necessary to use additional device for recovering battery from high energy flow When ultracapacitor technology combined with battery, energy will be used more efficiently and the life of the battery is increased A solution to the rapid change in power cycle of the vehicle on uneven path is the use of hybrid electric vehicle which gets power from battery and ultracapacitor where battery satisfies energy requirement and ultracapacitor satisfies power requirement High energy demand of the driver can be fulfilled through the ultracapacitor, which is connected in shunt with battery Because high energy means high current and ultracapacitor structure is available to ensure this state instead of battery In this paper, motoring, regenerative braking and several energy management methods are discussed for hybrid electric vehicle with the help of MATLAB The results of this scheme are being compared with only battery and combination of battery and ultracapacitor The speed control of DC motor is also compared at different reference speeds and load torque using bi-directional converter and PI controller

Erratum to: Development of a Reconfigurable and Miniaturized CPW Antenna for Selective and Wideband Communication

Abstract: The Planar microwave antennas with simultaneously selectively narrowband and wideband resonance characteristics are essential for the diversity applications. The paper presents modeling, fabrication and experimental verification of a coplanar waveguide excited antenna with a complementary patch which exhibits a narrow-band resonance at 2.47 GHz, and a wideband resonance between 5.52 and 11 GHz. A reconfigurability in the antenna design was achieved by placing a PIN diode across the slot position, and the wideband resonance was switched to the narrowband resonance with a center frequency of 9.56 GHz. The device was fabricated on a foam-based substrate of relative permittivity e r = 2.2 and loss factor tanδ = 0.007. The tested antenna shows a comparable matching with the simulated results and a superior performance over the other reported reconfigurable CPW antennas was achieved.

Evaluation of arduino based das for condition monitoring of induction motor

Abstract: This paper presents design of an industrial data acquisition monitoring system using Arduino prototyping platform and MATLAB software It can overcome the shortcomings of poor flexibility and versatility of traditional data acquisition monitoring system The Data Acquisition System (DAS) has been employed to collect the current data of a singlephase induction motor through USB communication The prototype developed for experiment shows that data collection and monitoring system has features of being low cost, easy to use and wide range of application and has very important application for collection and monitoring data in industrial areas and laboratories This cost-effective hardware platform along with adequate data processing capability can be used to monitor motors from abnormalities

A modernistic PLL based on feed forward frequency estimator with selective harmonic pre filter for grid imperfection

Abstract: This paper describes a synchronisation technique to track phase and frequency of input signal under abnormal grid condition like frequency variation. Proposed control topology consist of a conventional synchronous reference frame phase locked loop (SRF PLL) type-2 along with a feed forward frequency estimator loop with selective harmonic filtering technique. It eliminates phase and frequency error under wide frequency deviation. Phase error is fed into proportional integral regulator which reduces it to zero. It is observed that faster and better dynamic performance is achieved by frequency estimator with higher stability margin. The stability is evaluated by bode plot. An estimated frequency is smooth and close to fundamental frequency as it uses the information from all three phase to estimate a single value for frequency. The feed forward action is implemented with pre filtering stage to improve dynamic performance of system. Simulation results are presented to validate effectiveness of proposed technique.