M. Vijayalakshmi ¹, R. Ramaprabha ¹, G. Ezhilarasan ²

Affiliations
1 Department of EEE, SSN College of Engineering, Old Mahabalipuram Road, Kalavakkam, Chennai - 603110, Tamil Nadu, IN
2 Department of EEE, Saveetha School of Engineering, Thandalam, Chennai - 602105, Tamil Nadu, IN

Abstract

Background/Objectives: To have a sustainable and low carbon living, efficient use of renewable energy is necessary hence, a power converter with less switching loss is proposed for the improvement of efficiency of proposed system. Methods/Statistical Analysis: In this work a dc boost converter is considered using an auxiliary resonant circuit for implementation of soft switching technology to reduce switching loss in the converter. The proposed dc resonant boost converter is designed for a required dc output based on the gate duty cycle. The soft switching is made possible by suitably designing the values of the inductor and capacitor of the dc resonant circuit. This circuit is simulated with MATLAB software. Findings: The resonant dc boost converter was simulated using MATLAB software with hard switching, the results of the simulation is discussed with waveforms and numerical values. The soft switched converter was able to provide an improved output voltage of 2Volts, current of 0.4 A, compared to the conventionally designed converter. Suitable design of the resonant components namely the inductor and capacitor, the efficiency of the soft-switched resonant boost converter improved by 2% compared to hard switched converter. Both the hard switching and soft-switched converters were simulated in open loop. It is evident from the output voltage and current waveforms, the settling time taken by the soft-switched converter is more compared to hard switched converter, but the improvement in voltage profile, current profile and efficiency overcomes the drawback of increased settling time. The resonant soft-switched converter when compared with the other converters reported provides an improved performance hence very much suitable for solar photovoltaic application. Applications/Improvements: The performance of the soft-switched converter can be improved further through closed loop control with simple controllers or using fuzzy logic controllers. This converter can also be used for other sources in any distributed generation.

Keywords

Auxiliary Resonance, dc-dc Converter, Resonant Converter, Soft Switching, Solar Photovoltaic

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M. Vijayalakshmi ¹, K. Rajalakshmi ¹

Affiliations
1 Department of Electrical and Electronics Engineering, Vel Tech Multi Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Avadi, Chennai – 600062, Tamil Nadu, IN

Abstract

Objectives: To increase the chances of saving the victims under debris especially those trapped under collapsed building. Methods: Technology used in this project is Internet of Things (IOT); through this technology the information about the victim trapped under debris is collected and stored in internet which is used for future use. A separate website is created to store the information about the workers in and out time and a GPS system is used to identify the victim location Findings: The simulation result explains about the latitude and longitude position of victim under rubble, Employer Id and the status of the victim under rubble. While comparing with the existing system the ARM processor is used where the analog to digital signal conversion is faster while comparing with PIC microcontroller, the information stored about the victim is useful for future purpose. Applications: Improvement is to reduce the size of the hardware and weight of the hardware. It is mainly applicable for saving the victims' life under collapsed building and under rubble.

Keywords

ARMLPC2148A, Collapsed Building, IOT Technology, Piezoelectric Plate and GPS, Victims.

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