13-03-2012, 11:20 PM
sir, please can u provide me the full report in the form of pdf.
13-03-2012, 11:20 PM
sir, please can u provide me the full report in the form of pdf.
14-03-2012, 10:35 AM
to get information about the topic " wireless charger" full report ppt and related topic refer the link bellow
https://seminarproject.net/Thread-wirele...ull-report https://seminarproject.net/Thread-wirele...ves--17724 https://seminarproject.net/Thread-wirele...ort?page=4
27-06-2012, 05:08 PM
Wireless Charging
Wireless Charging.docx (Size: 34.56 KB / Downloads: 33) ABSTRACT It seems these days that everyone has a cellular phone. Whether yours is for business purposes or personal use, you need an efficient way of charging the battery in the phone. But, like most people, you probably donâ„¢t like being tethered to the wall. Imagine a system where your cellular phone battery is always charged. No more worrying about forgetting to charge the battery. Sound Impossible? A system will be presented using existing antenna and charge pump technology to charge a cellular phone battery without wires. This report covers the basis and design of the wireless battery charger. The wireless charger will convert the RF/ microwave signal at 915 MHz frequency into a DC signal, and then store the power into a battery. Introduction And Motivation Cellular telephone technology became commercially available in the 1980â„¢s. Since then, it has been like a snowball rolling downhill, ever increasing in the number of users and the speed at which the technology advances. When the cellular phone was first implemented, it was enormous in size by todayâ„¢s standards. This reason is two-fold; the battery had to be large, and the circuits themselves were large. The circuits of that time used in electronic devices were made from off the shelf integrated circuits (IC), meaning that usually every part of the circuit had its own package. These packages were also very large. These large circuit boards required large amounts of power, which meant bigger batteries. This reliance on power was a major contributor to the reason these phones were so big. Through the years, technology has allowed the cellular phone to shrink not only the size of the ICs, but also the batteries. New combinations of materials have made possible the ability to produce batteries that not only are smaller and last longer, but also can be recharged easily. However, as technology has advanced and made our phones smaller and easier to use, we still have one of the original problems: we must plug the phone into the wall in order to recharge the battery. Most people accept this as something that will never change, so they might as well accept it and carry around either extra batteries with them or a charger. Either way, itâ„¢s just something extra to weigh a person down. There has been research done in the area of shrinking the charger in order to make it easier to carry with the phone. One study in particular went on to find the lower limit of charger size [1]. But as small as the charger becomes, it still needs to be plugged in to a wall outlet. How can something be called wireless when the object in question is required to be plugged in, even though periodically? THE NOKIA DESKTOP STAND Nokia DCV-15 Desktop Stand In order to get the charging board to fit the stand, some slight modification to the Nokia stand was necessary. There is a solid piece of metal, probably copper, about one quarter of and inch thick that is attached to the inside of the stand with screws in the area where the charging board was to be added. This metal is most likely a counter-weight for the stand to make it heavier and more resistant to capsizing when the phone is in the cradle. Without this metal, the stand functions normally. The stand weighs less without it, but this is of no concern in this phase of testing. Once this weight was removed, there was sufficient room in the upper area of the stand for a PCB. The dimensions of this area were obtained using calipers. The last modification to Phone. Antenna The antenna plays a very important role. To charge a battery, a high DC power signal is needed. The wireless battery charger circuit must keep the power loss to the minimal. Therefore, there are many considerations to choose the correct parts for the design. The considerations of choosing the appropriate antenna are: 1. Impedance of the antenna 2. Gain of the antenna.
14-07-2012, 12:55 AM
Can u please mail me your reports ppt to glenvargheset[at]gmail.com...
14-07-2012, 09:19 AM
to get information about the topic " wireless charger" full report ppt and related topic refer the link bellow
https://seminarproject.net/Thread-wirele...ull-report https://seminarproject.net/Thread-wirele...ves--17724 https://seminarproject.net/Thread-wirele...ort?page=4
11-09-2014, 09:08 AM
it seems very useful for me...thank you[/size][/font]
it seems useful for me ..than you very much |
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