In recent years, renewable energy sources have been drastically increased over any other energy sources. In among those renewable energy sources, solar energy has gained more attention and importance over other types of renewable energies. On a smaller scale, whether by PV cell panels or passive solar home architecture, we can leverage the sun's rays to fuel the entire building. Passive solar homes are built to obtain heating through concrete, bricks, tiles, and other heat retaining materials in the sun through south-facing windows. Some solar-powered homes produce more than enough electricity, enabling the homeowner to return to the grid to sell surplus power. Batteries are also an economically attractive way to store excess solar energy so that it can be used at night. Scientists are hard at work on new advances that blend form and function, such as solar skylights and roof shingles. So, in order to convert solar energy to electrical energy, inverters are employed using photovoltaic cells. According to the necessity of power consumption and to increase the efficiency multilevel inverters are made into applicability. This paper focuses on the vital role played by photovoltaic cells to reduce the switching stress on cascaded type H-Bridge configured multilevel inverter. As a positive side effect of this, one can achieve reduced harmonic distortion, increased efficiency in output power, reduced power loss, ease of implementation. As well as by decreasing the number of switches employed, the system become more efficient.
There is an ignorance prevailing among the people on home security these days. They intend it as just as surveillance technologies such as CCTV and other such security system. The security system besides keeping an eye as monitoring the vicinity, it should prevent the mishap. The major mishap that’s predominant is the fire accident caused due to leakage of LPG gas at home. There was ample number of cases investigated and published in the newspapers more often. The proposed system focuses on a system which precludes such mishaps that causes fatal burns and injuries to the lives in that particular vicinity. The system contains gas sensor, PIR sensor and temperature sensor which is used for monitoring and sensing the gas leakage in the kitchen or industry and reacts to it through the micro-controller which turns off the stove/valve by a DC motor that is interfaced with the knob. Also, for a preventive action, it activates the alarm and sends a display text in the other room through Li-Fi communication.
This paper includes the design and implementation of a new electric vehicle charger, which is powered using a battery consisting of an enhanced power factor frontend. The traditional diode that is at the source end is omitted in the proposed design using the conventional power factor improvement inverter. The inverter has its parameters closer to the configuration of a basic push pull converter. The above-mentioned converter works with the phenomenon of electric vehicle battery control. Two modes of operation are incorporated out of which the former one is constant current mode and the latter is constant voltage mode. To obtain the desired regulation of DC voltage at the point of coupling and also to improve the operational efficiency to unity power factor, the proposed Landsman converter is operated using a single sensed individual. This method yields improved power quality, less harmonics in comparison with a conventional one. A prototype is constructed and tested by charging a 48V electric vehicle battery of 100Ah size under the transients in input voltage to display the proposed charger to an IEC61000-32 standard. All the cases are said to be satisfied by performance of the charger.
The road transportation in India has growing day by day. The Indian road network carries about 65 percent of its Goods and about 85 percent of passengers. The national highways in India are now increased from 44,076 miles to 88,313 miles in 2018 to 2019. Along these road networks there are about 450 toll plazas totally in India. These toll plazas contribute some major part of India’s economy, it is estimated the toll revenue can swell up to 1 lakh crore rupees in next five years. In spite of this enormous growth the toll plazas have huge traffic during peak most of the time which incurs delay and loss human hours to surpass the toll. The proposed system focuses on an automatic toll collection system which will automatically debit the amount from vehicle owner’s bank. The automated registration and collection are based on using the RFID chip which is amalgamated in the vehicle’s windshield. By this method, the information about registration ID of the vehicle can be obtained therefore stolen vehicle can also be detected by this system as the vehicle ID is linked to the user’s account. Thus, this system provides fast and efficient surpassing of toll plazas without any delay.
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