4
1.2 Historical Background
Unless someone is particularly organized and good with tie wrap, they probably have a few dusty power cord tangles around their home. Some may have even had to follow one particular cord throughthe seemingly impossible snarl to theoutlet,hoping that the plug they pull will be the right one. This isone of the downfalls of electricity.While it can make people's lives easier, it can add a lot of clutter inthe process.For these reasons, scientists have tried to develop methods of wireless power transmission that couldcut the clutter or lead to clean sources of electricity. While the idea may sound futuristic, it isn't particularly new. Nicola Tesla proposed theories of wireless power transmission in the late 1800s andearly 1900s. One of his more spectacular displays involved remotely poweringlightsin the ground athis Colorado Springs experiment station. Tesla's work was impressive, but it didn't immediately lead towidespread, practical methods for wireless power transmission. Since then, researchers have developedseveral techniques for moving electricity over long distances without wires. Some exist only astheories or prototypes, but others are already in use.Late scientist Nikola Tesla was the one who first conceived the idea of Wireless Power Transmissionand demonstrated the transmission of electrical energy without wires that depends upon electricalconductivity, as early as 1891. In 1893, Tesla demonstrated the illumination of vacuum bulbs withoutusing wires for power transmission at the World Columbian Exposition in Chicago. The Wardenclyffetower was designed and constructed by Tesla mainly for wireless transmission of electrical power rather than telegraphy.In 1904, an airship ship motor of 0.1 horsepower is driven by transmitting power through space from adistance of least 100 feet. In 1961, Brown published the first paper proposing microwave energy for power transmission, and in 1964 he demonstrated a microwave-powered model helicopter thatreceived all the power needed for flight from a microwave beam at 2.45 GHz from the range of 2.4GHz
–
2.5 GHz frequency band which is reserved for Industrial, Scientific, and Medical (ISM)applications. Experiments in power transmission without wires in the range of tens of kilowatts have been performed at Goldstone in California in 1975 and at Grand Bassin on Reunion Island in 1997
[13]
.Inductive coupling is used in Oral-B rechargeable toothbrushes by the Braun (Company) since early
1990’s. Research continued in this particular area since then but a very few of them came through. Oneof the remarkable successes among them was the ―Powermat‖. This was the main inspiration of our
project. Powermat came with a special case for each mobile phone which acts as the receiver. Themain dock, which acts as the transmitter, is connected to the electric socket by a wire. But the fact thateach model of mobile phone required different casings, which made it bulky and difficult to carryaround, made us think of something smaller. Hence we came up with the idea of a circuit that could beintegrated into a micro or even a Nano chip and could be implemented inside the low power device bythe manufacturer
4
1.2 Historical Background
Unless someone is particularly organized and good with tie wrap, they probably have a few dusty power cord tangles around their home. Some may have even had to follow one particular cord throughthe seemingly impossible snarl to theoutlet,hoping that the plug they pull will be the right one. This isone of the downfalls of electricity.While it can make people's lives easier, it can add a lot of clutter inthe process.For these reasons, scientists have tried to develop methods of wireless power transmission that couldcut the clutter or lead to clean sources of electricity. While the idea may sound futuristic, it isn't particularly new. Nicola Tesla proposed theories of wireless power transmission in the late 1800s andearly 1900s. One of his more spectacular displays involved remotely poweringlightsin the ground athis Colorado Springs experiment station. Tesla's work was impressive, but it didn't immediately lead towidespread, practical methods for wireless power transmission. Since then, researchers have developedseveral techniques for moving electricity over long distances without wires. Some exist only astheories or prototypes, but others are already in use.Late scientist Nikola Tesla was the one who first conceived the idea of Wireless Power Transmissionand demonstrated the transmission of electrical energy without wires that depends upon electricalconductivity, as early as 1891. In 1893, Tesla demonstrated the illumination of vacuum bulbs withoutusing wires for power transmission at the World Columbian Exposition in Chicago. The Wardenclyffetower was designed and constructed by Tesla mainly for wireless transmission of electrical power rather than telegraphy.In 1904, an airship ship motor of 0.1 horsepower is driven by transmitting power through space from adistance of least 100 feet. In 1961, Brown published the first paper proposing microwave energy for power transmission, and in 1964 he demonstrated a microwave-powered model helicopter thatreceived all the power needed for flight from a microwave beam at 2.45 GHz from the range of 2.4GHz
–
2.5 GHz frequency band which is reserved for Industrial, Scientific, and Medical (ISM)applications. Experiments in power transmission without wires in the range of tens of kilowatts have been performed at Goldstone in California in 1975 and at Grand Bassin on Reunion Island in 1997
[13]
.Inductive coupling is used in Oral-B rechargeable toothbrushes by the Braun (Company) since early
1990’s. Research continued in this particular area since then but a very few of them came through. Oneof the remarkable successes among them was the ―Powermat‖. This was the main inspiration of our
project. Powermat came with a special case for each mobile phone which acts as the receiver. Themain dock, which acts as the transmitter, is connected to the electric socket by a wire. But the fact thateach model of mobile phone required different casings, which made it bulky and difficult to carryaround, made us think of something smaller. Hence we came up with the idea of a circuit that could beintegrated into a micro or even a Nano chip and could be implemented inside the low power device bythe manufacturer
การแปล กรุณารอสักครู่..