ADVANCED OPTIMIZATION CIRCUIT FOR WIRELESS POWER TRANSFER

Journal for Research | Volume 02 | Issue 04 | June 2016 ISSN: 2395-7549

Advanced Optimization Circuit for Wireless Power Transfer Jai Prakash Sarwa M. Tech Student Department of Electrical Engineering Kalinga University, Raipur, Chhattisgarh, India

Lumesh Kumar Sahu Assistant Professor Department of Electrical Engineering Kalinga University, Raipur, Chhattisgarh, India

Abstract The wi-fi energy transfer (WPT) is an emerging era with increasingly more ability packages to transfer energy from a transmitter to a cellular receiver over a noticeably huge air gap. but, its extensive utility is hampered due to the relatively low performance of modern wireless power switch (WPT) structures. This study gives an idea to maximize the performance in addition to to increase the quantity of extractable electricity of a WPT system operating in resonant operation. The proposed method is primarily based on actively modifying the equal secondary-side load impedance by controlling the section-shift of the active rectifier and its output voltage degree. The offered hardware prototype represents an entire wireless charging machine, consisting of a dc–dc converter that is used to price a battery at the output of the system. Experimental results are shown for the proposed concept in comparison to a traditional synchronous rectification approach. The supplied optimization technique sincerely outperforms trendy solutions in phrases of efficiency and extractable power.

Keywords: Wireless power transmission, electromagnetic induction _______________________________________________________________________________________________________ I.

INTRODUCTION

In today’s international of ever-increasing low-strength portable electronics, from implants to wireless accessories, powering those devices efficiently and with no trouble is an escalating issue. The proposed solution is to wirelessly recharge these decrease-strength transportable gadgets through a commonplace magnetic hyperlink with a higher-strength portable tool, consisting of a smart telephone. Such a way is convenient for users, environmentally friendly, and reasonably-priced to enforce. on the low-power stop, many medical implants depend on wireless energy to characteristic. One example is the cochlear implant, a device with implanted electrodes that stimulate auditory nerves to sell hearing [5]. consistent with the meals and Drug administration, as of December 2012, approximately 324,000 humans international have obtained those gadgets [10]. every implant is coupled via a magnet to an energy transmitter out of doors the ear, which transfers milliwatts of strength wirelessly thru the skin.

Researchers also are growing retinal implants that stimulate electrodes in the attention to promote sight [4]. these medical devices require at the order of 100 mW of wirelessly transmitted power. outside the clinical area, researchers are also investigating structures to wirelessly fee lithium ion batteries at 10 mW charges [8].

In the center of the electricity spectrum, many industrial products are in the marketplace today that provide wi-fi strength for famous consumer electronics such as cellular phones and pills. One instance is the Duracell Powermat, which a charging pad is plugged into an electrical outlet that recharges well suited patron devices placed on top [6]. devices along with cell telephones may be geared up with a special case to support wi-fi recharging. on the excessive-electricity cease, at approximately 1 kW ranges, humans in each academia and enterprise are developing technologies to power huge machines. At CES 2011, Fulton Innovation tested the generation to wirelessly price batteries in an electric automobile [7]. Researchers are studying gadget designs for higher efficiency energy transfer to wafer processing machines [9].

The proposed transportable wi-fi charging software differs from conventional charging pad based totally systems in that the transmitter is strength restrained, so device efficiency is key. also, due to the fact each the transmitter and receiver are transportable, loading at the transmitter changes dynamically, which affects efficiency and introduced strength II. METHODOLOGY The assignment is to develop efficient version for wi-fi charging circuit. in this paintings a sophisticated optimization approach for a whole wireless charging device, which include an energetic rectifier and a DC-DC converter charging a battery, is investigated in detail. The presented technique assumes non-resonant operation (IPT) and is based at the Qi trendy specs. while implemented to an RPT device working exactly at resonance frequency, the reactive part of the device is inherently compensated, and subsequently the proposed method shows the equal behavior as a synchronous rectifier. but, any deviation from the resonance frequency, precipitated e.g. by means of parameter variations of the passive components, allows a performance increase of the proposed idea over a synchronous rectification method. A stepped forward manipulate approach to actively adjust the resistive as well as the reactive part of the equal load impedance is brought with a view to optimize the device overall performance. This

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Advanced Optimization Circuit for Wireless Power Transfer (J4R/ Volume 02 / Issue 04 / 09)

method, applicable to any IPT gadget, is used to in addition improve the machine performance and to extract more power. The provided technique is primarily based on controlling both the segment shifts of the lively rectifier and its output voltage stage.

Fig. 1: Schematic block diagram of the overall WPT system including an inverter stage

the primary drawbacks of presently to be had WPT structures for patron applications are, amongst others, the pretty low normal performance and the constrained strength switch functionality. This outcome in lengthy charging times which hampers the significant application of the WPT technology. to overcome these issues numerous improvements had been counseled in literature. design and optimization methodologies for growing the performance or the most transferable power of a WPT link were proposed in assuming that the machine parameters are freely selectable. however, those optimization techniques aren't applicable to commercial charging programs, where the system parameters are defined by a trendy.

III. RESULTS AND DISCUSSION to test the efficacy of the proposed work, the device has been designed and simulated as proven beneath

Fig. 2: Simulink model of the overall WPT

The simulink model for the proposed paintings is shown inside the discern. The output of the device is given as shown in figure 3

Fig. 3: Output of the simulink model

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Advanced Optimization Circuit for Wireless Power Transfer (J4R/ Volume 02 / Issue 04 / 09)

After designing and enforcing of proposed technique with grid-linked solar photovoltaic system there would be a few anticipated end result: firstly, perfect response for power transport into the gadget. Secondly resonance is acquired for optimum strength transfer in device and performance is 86%.

IV. CONCLUSIONS A wi-fi charging with a bifilar design for an MATLAB/SIMULINK version for wireless battery charging machine turned into investigated, thru magnetic near discipline evaluation. It has located that the leakage flux from the uncovered coil became diverted into the ferrite center, lowering the flux density from between 5mV to 10mV to 1.5mV to 2mV, which resulted to a discount of about 5 instances. furthermore, a surest air hole distance in relationship to the operational frequency and load changed into observed. change in resistance alters the resonant traits of the number one aspect. Computational simulation is utilized to improve the performance of wireless charging.

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