09-02-2011, 10:51 PM
hii.. sir i m Rupesh jain student of b.tech 4th year i want to seminar report on the wireless mobile charging plz... help me sir
09-02-2011, 10:51 PM
hii.. sir i m Rupesh jain student of b.tech 4th year i want to seminar report on the wireless mobile charging plz... help me sir
27-04-2011, 02:56 PM
to get information about the topic wireless mobile charger full report, ppt and related topic refer the link bellow
https://seminarproject.net/Thread-wirele...ves--17724 https://seminarproject.net/Thread-wirele...ull-report https://seminarproject.net/Thread-wirele...ull-report http://project-seminars.com/attachment.php?aid=1912 https://seminarproject.net/Thread-coin-b...ull-report https://seminarproject.net/Thread-wirele...ves?page=3 https://seminarproject.net/Thread-smart-...r%E2%80%99 https://seminarproject.net/Thread-wirele...9#pid64479
21-09-2012, 04:43 PM
WIRELESS MOBILE CHARGING
WIRELESS MOBILE CHARGING.pptx (Size: 156.78 KB / Downloads: 38) INTRODUCTION The wireless charge will convert the RF signal at 900MHz frequencies into a DC signal ,and then store the power into a mobile battery. DESIGN OVERVIEW The wireless battery charger is designed to operate at 900Mhz. power transmitter acts as the power source. Power transferred to the receiver is connected to DC signal. Charging circuit will store power into the mobile battery. TRANSMITTER an antenna was connected through an amplifier to a radio-frequency (RF) source. The RF source is a circuit that outputs a signal at a user-specified frequency and voltage. The range of frequencies of the signal generator resides in the radio frequency band, 3 mega-hertz (MHz) to 3 giga -hertz (GHz). The transmitting antenna is called a patch antenna and is fabricated from copper plating that soldered to a feed wire and has a ground plane. ANTENNA The considerations of choosing the appropriate antenna are Impedance of the antenna Gain of the antenna The impedance of the antenna should match with the output impedance of the power transmitter and input impedance of the rectifier circuit RECEIVER The receiver’s main purpose is to charge a battery. A simple battery charging theory is to run current through the battery, and apply a voltage difference between the terminals of the battery to reverse the chemical process. BACKGROUND RF energy using an antenna, input it into a charge-pump and use this energy to power some other circuit These projects range from tuning the charge pump to using results from existing charge pumps to drive other circuits testing is done using a light emitting diode (LED) RF energy is transmitted to the circuit and the charge pump stores the energy in a large capacitor. When the amount of charge is large enough, the LED uses the stored energy to light for a moment. This is called a charge-and-fire system This type of technology is very useful in Radio Frequency Identification (RFID) applications DISADVANTAGES USING CHIP In older systems, the frequency or amplitude of this signal was modulated by the chip and sent back. This technique is called backscatter the chips are getting more complicated and require much more power to run The RFID system is unsuitable for batteries mostly because they have to be small with a good antenna, a charge pump should be able to handle the powering of these circuits and never will need to be serviced. Because the circuits are small, the power required is minimal. CONCLUSION In this paper we submit a first steps towards a goal that would have profound ramifications on the cellular phone industry and the portable electronic device industry as a whole. Even though our project proceedings show that we are not completely successful at achieving our overall goal of having the charging circuit in a stand and be able to charge the battery of a cellular phone while it was within the phone using a wireless RF source, we are still putting our heart and soul to make this dream turn a reality. |
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