International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
A NEW OPTIMUM POWER CONTROL SCHEME FOR LOW POWER ENERGY HARVESTING SYSTEM G.S.Nandini1 P.S.M.M.Malavika2 B.Manikanta3G.Ventakesh4 K. Manikanta Raju5 1,2,3,4,5 Student Department of EEE, Pragati Engineering College, Surampalem, A.P ---------------------------------------------------------------------***---------------------------------------------------------------------
ABSTRACT: Energy Harvesting has become a popular source for low-power electronic systems such as wireless sensors and biomedical implants .Energy can be extracted from a number of ambient conditions such as vibration ,solar ,and thermal gradient .Just like renewable sources, the associated switching power converters can be controlled to harvest maximum power from these miniature systems .However conventional maximum power point tracking(MPPT) controller for solar cell ,are complex and cannot be utilized in low-power energy systems due to their cost and power requirements .In this paper, a novel optimum energy harvesting scheme is proposed in which maximum power is obtained from three different modules connected in parallel . The control system employs only simple mixed signal components and can be applied to lowpower systems. The proposed scheme does not depend on the characteristics of a specified source and is applicable for different energy systems. It is utilized to achieve optimized energy harvesting from three different power generation modules .Boost converter and buck converter are used to utilize the maximum power extracted from this new optimum energy harvesting scheme . Key Words: EMR, PV, DC, TEG. INTRODUCTION: Energy harvesting (also known as power harvesting or energy scavenging or ambient power) is the process by which energy is derived from external sources captured and stored for small, wireless autonomous devices like those used in wearable electronics and wireless sensor networks. The choice of the energy-harvesting source depends on the nature of the application and power requirements of the particular electronic load. One of the principal topics under research for energy harvesting systems is the associated power processing circuit. Such systems are generally low in voltage and very low in power, making the design of power converter quite challenging. The main objective of this new optimum power control scheme for low-power energy harvesting systems is
To improve the efficiency of the system To produce maximum energy extraction which is used for low power electronics application
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SOURCES OF ENERGY HARVESTING:
Mechanical energy Thermal energy Light energy Electromagnetic energy Natural energy Human body
TYPES OF ENERGY HARVESTING: The classification can be organised on the basis of the form of energy they use to scavenge the power.
Piezoelectric material harvesting Electrostatic harvesting Electromagnetic energy harvesting Thermoelectric generators harvesting
PROCESS OF MAXIMUM ENERGY EXTRACTION: The new optimum power control; scheme is applicable for different low-power energy resources from which maximum power extraction can be done. Input Speech Signal Noise Addition Noise Reduction Filter Frequency Shaper Amplitude Compression Output Speech Signal Fig 1: System Block Diagram
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