Wireless charging
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Wireless charging uses electromagnetic induction to transfer energy between two objects over short distances, allowing devices to charge without plug-in cables. Its history dates back to Nikola Tesla's 1902 patent, though modern wireless charging standards like Qi were established in 2009. It works by using a transmitter coil to produce alternating current which induces a current in a receiver coil to charge a battery. Applications include charging phones, laptops, electric vehicles and more, though it has lower efficiency and slower charging than wired methods.
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Wireless charging
A presentation on wireless charging.
Inductive charging (also known as wireless charging or cordless charging) uses an electromagnetic field to transfer energy between two objects through electromagnetic induction. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
Induction chargers use an induction coil to create an alternating electromagnetic field from within a charging base, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electric current to charge the battery. The two induction coils in proximity combine to form an electrical transformer Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.
Recent improvements to this resonant system include using a movable transmission coil (i.e. mounted on an elevating platform or arm) and the use of other materials for the receiver coil made of silver plated copper or sometimes aluminium to minimize weight and decrease resistance due to the skin effect.
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Hi there,
Many of us forgot to charge their mobile phones and if there any powercut we can't charge the mobiles right ! . These problem is solved here... For more details download this ppt Now.
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The document is a seminar report on wireless charging submitted by Mohammad Affan to M.J.P Rohilkhand University in partial fulfillment of a Bachelor's degree in Computer Applications. It discusses three main types of wireless charging - inductive charging, radio charging, and resonance charging. Inductive charging uses electromagnetic induction to transfer energy through induction coils, while radio charging is used for small, low-power devices and resonance charging is used for high-power devices that require large amounts of energy.
Wireless Charging in mobiles
Wireless charging works by using magnetic induction to transfer energy between two coils. When electricity flows through a charging coil, it creates a magnetic field that induces a current in a receiving coil connected to a device battery. Early experiments with wireless power transmission date back to Nikola Tesla in 1901, while more recent research by MIT in 2007 demonstrated wireless charging over distances of a few meters. Wireless charging technologies include magnetic induction, resonance charging, radio frequency and optical charging, enabling convenient charging of devices without cables.
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This document discusses a batteryless phone prototype that was developed by researchers. The phone is able to operate without a battery by harvesting energy from ambient light and radio frequency signals using a small photo diode. It converts the harvested light and RF energy into direct current power that allows the phone to perform basic calling functions. While this prototype demonstrates the potential of batteryless phones, their range is currently limited and they lack many features of traditional smartphones. Researchers hope to expand the technology to add capabilities like encryption, video streaming, and internet access in the future.
Wireless electricity
hi every body this ppt is atmost best ppt up to my knowledge which will gives a idea of "what is wire less electricity"(ln med voltage range)
if you need this ppt ,just mail to "gopalsai77@gamil.com"
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This document discusses wireless charging technology for mobile phones. It describes three methods of wireless charging - resonance charging, inductive charging, and radio charging. Inductive charging works by using electromagnetic induction to transfer energy between coils in the charging base and device. The document proposes using this principle to automatically charge phones as users talk, eliminating the need for separate chargers and wires. It presents the block diagram and advantages of the wireless charging system.
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Wireless charging
A presentation on wireless charging.
Inductive charging (also known as wireless charging or cordless charging) uses an electromagnetic field to transfer energy between two objects through electromagnetic induction. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
Induction chargers use an induction coil to create an alternating electromagnetic field from within a charging base, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electric current to charge the battery. The two induction coils in proximity combine to form an electrical transformer Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.
Recent improvements to this resonant system include using a movable transmission coil (i.e. mounted on an elevating platform or arm) and the use of other materials for the receiver coil made of silver plated copper or sometimes aluminium to minimize weight and decrease resistance due to the skin effect.
Wi CR-Wireless Charging
Hi there,
Many of us forgot to charge their mobile phones and if there any powercut we can't charge the mobiles right ! . These problem is solved here... For more details download this ppt Now.
Wireless charging
The document is a seminar report on wireless charging submitted by Mohammad Affan to M.J.P Rohilkhand University in partial fulfillment of a Bachelor's degree in Computer Applications. It discusses three main types of wireless charging - inductive charging, radio charging, and resonance charging. Inductive charging uses electromagnetic induction to transfer energy through induction coils, while radio charging is used for small, low-power devices and resonance charging is used for high-power devices that require large amounts of energy.
Wireless Charging in mobiles
Wireless charging works by using magnetic induction to transfer energy between two coils. When electricity flows through a charging coil, it creates a magnetic field that induces a current in a receiving coil connected to a device battery. Early experiments with wireless power transmission date back to Nikola Tesla in 1901, while more recent research by MIT in 2007 demonstrated wireless charging over distances of a few meters. Wireless charging technologies include magnetic induction, resonance charging, radio frequency and optical charging, enabling convenient charging of devices without cables.
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hi every body this ppt is atmost best ppt up to my knowledge which will gives a idea of "what is wire less electricity"(ln med voltage range)
if you need this ppt ,just mail to "gopalsai77@gamil.com"
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This document discusses wireless charging technology for mobile phones. It describes three methods of wireless charging - resonance charging, inductive charging, and radio charging. Inductive charging works by using electromagnetic induction to transfer energy between coils in the charging base and device. The document proposes using this principle to automatically charge phones as users talk, eliminating the need for separate chargers and wires. It presents the block diagram and advantages of the wireless charging system.
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Human: Thank you for the summary. You captured the key points effectively in 3 concise sentences as requested.
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PROJECT DESCRIPTION
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The main objective of this project is to develop a device for wireless power transfer. The concept of wireless power transfer was realized by Nikolas tesla. Wireless power transfer can make a remarkable change in the field of the electrical engineering which eliminates the use conventional copper cables and current carrying wires.
Based on this concept, the project is developed to transfer power within a small range. This project can be used for charging batteries those are physically not possible to be connected electrically such as pace makers (An electronic device that works in place of a defective heart valve) implanted in the body that runs on a battery.
The patient is required to be operated every year to replace the battery. This project is designed to charge a rechargeable battery wirelessly for the purpose. Since charging of the battery is not possible to be demonstrated, we are providing a DC fan that runs through wireless power.
This project is built upon using an electronic circuit which converts AC 230V 50Hz to AC 12V, High frequency. The output is fed to a tuned coil forming as primary of an air core transformer. The secondary coil develops a voltage of HF 12volt.
Thus the transfer of power is done by the primary(transmitter) to the secondary that is separated with a considerable distance(say 3cm). Therefore the transfer could be seen as the primary transmits and the secondary receives the power to run load.
Moreover this technique can be used in number of applications, like to charge a mobile phone, iPod, laptop battery, propeller clock wirelessly. And also this kind of charging provides a far lower risk of electrical shock as it would be galvanically isolated.
Wireless power transmission
The document discusses wireless power transmission (WPT) through various techniques like inductive coupling, resonant inductive coupling, microwave power transmission, and laser power transmission. It provides a history of WPT beginning with Nikola Tesla's experiments in the late 1890s. Examples of applications discussed include electric vehicle charging, powering consumer electronics, and transmitting power from solar satellites to earth. The document concludes that WPT is becoming a reality and could help address energy crises through its efficient and low maintenance capabilities.
Wireless charging of mobile PPT.
This document discusses the design of a system for automatically recharging mobile phones using microwaves. It describes a transmitter that sends microwave signals along with message signals using a slotted waveguide antenna at 2.45 GHz. Mobile phones would be equipped with a rectenna and sensor to receive the microwaves and convert them to electricity to charge the phone battery. When the sensor detects an incoming call signal, it triggers the rectenna to receive power from the microwaves. This would eliminate the need for separate chargers and allow for universal wireless phone charging anywhere.
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This project work deals with wireless energy subject. Wireless power transfer or wireless energy transmission is the transmission of electrical power from a power source to a consuming device without using discrete manmade conductors. It is a generic term that refers to a number of different power transmission technologies that use time varying electro magnetic field. Wireless transmission is useful to power electrical devices in cases where interconnecting wires are inconvenient, hazardous, or are not possible. In wireless power transfer, a transmitter device connected to a power source, such as the mains power line, transmits power by electromagnetic fields across the space to one or more receiver devices, where it is converted back to electric power and utilized. In general, the efficiency of wireless power system will be very poor because of generating huge electro magnetic field. To generate such a huge field, lot of current must be pumped in to the energy transmitting coil, where as power receiving coil may not receive all the energy that is induced in the power transmitting coil. Depending up on the distance between the two coils, some of its energy will be received by the secondary coil. If the secondary coil is kept very close to the primary coil, more than 70 energy can be captured by the secondary coil. As the distance is increased, accordingly power losses also will be increased. So here the wireless power transmission concept is designed to operate multiple devices individually. The devices connected here for demonstration purpose are mobile charging, LED light and a DC motor. As the concept is designed a proto type module, the wireless power is not sufficient to operate all the devices at a time. So the loads are demonstrated to operate one at a time individually. If there's one bit of transformational technology in the mobile world today, it is wireless charging. Just as the world got a hang of using micro USB to charge everything and anything excluding Apple, the next best thing came along which is the wireless charging. Wireless energy works on the principle of electromagnetic induction. Coils of wire in the transmitter coil create a magnetic field as the current passes through. This field can induce an electrical current in an adjacent coil of wire without actually touching it. If this wire is part of a battery charging circuit, then you have wireless charging or it can be connected to any device to operate it directly. P. Sai Kumar Reddy | P. Vikas | G. Prabhuteja | B. Pulla Rao "Wireless Power Transmission to Multiple Devices" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-4 , June 2020, URL: https://www.ijtsrd.com/papers/ijtsrd31363.pdf Paper Url :https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/31363/wireless-power-transmission-to-multiple-devices/p-sai-kumar-reddy
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The document discusses witricity technology, which enables wireless transmission of electrical energy without wires. It provides a brief history of wireless power beginning with Nikola Tesla's experiments in the 1890s. Witricity was coined in 2005 and research at MIT in 2007 demonstrated non-radiative mid-range energy transfer with 43% efficiency. The document explains the working principle of resonant inductive coupling and describes various wireless energy transfer techniques. It addresses safety concerns and outlines applications for consumer electronics, transportation, industrial uses and more. Benefits include convenience, reliability and environmental friendliness compared to batteries. The limitations of witricity are also noted.
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Wireless charging
- 2. CONTENTS What is Wireless Charging? History Design and Working Applications More about Qi Advantages of Wireless Charging Limitations Conclusion References
- 3. WHAT IS WIRELESS CHARGING? Wireless charging (also known as " Inductive charging ") uses an electromagnetic field to transfer energy between two devices. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
- 4. Samsung Wireless Charging EP-PG920
- 5. HISTORY In 1902 Tesla filed a patent titled “Apparatus for Transmitting Electrical Energy” in which he describes a device that he believed could transmit electrical power from one conductor to another without the need for wires. In August 2009, a consortium of interested companies called the Wireless Power Consortium announced completion for a new industry standard for low-power Inductive charging called Qi, which is the present standard now.
- 6. WORKING The transmitter section uses a coil driven by power driver controlled by BQ500210 transmitter IC. The DC input in converted into high frequency AC current by the POWER DRIVER. The DC input voltage either +19 or +5 V and the frequency of AC current range between 110 and 205 kHz. With Alternating current flowing in transmitter coil the two coils gets magnetically coupled and alternating voltage is developed in the receiver coil. The rectifier section on the receiver end converts the alternating voltage produced to DC Voltage. The voltage controller section controls the voltage required for charging the battery. The transmitter adjusts the transferred power level by changing the operating frequency between 110 and 205 kHz with a lower frequency for more transferred power.
- 8. Inside a wireless charger
- 9. Wireless charging converter card
- 10. V/I SENSE It’s found that, efficiency depend on operating frequency at a certain power requirement. So the frequency has to be adjusted accordingly to attain maximum frequency.
- 11. APPLICATION Mobile Charging – Available on Nokia Lumia, LG, Sony Xperia, Samsung, etc. Laptop Charging. Portable gadgets like electric toothbrush. Electric vehicles.
- 13. MORE ABOUT QI Qi (coming from the Chinese word meaning "natural energy") is an interface standard developed by the Wireless Power Consortium for inductive electrical power transfer over distances of up to 4 cm (1.6 inches). Mobile device manufacturers that are working with the standard include Nokia, Asus, Samsung, Sony, Motorola, etc. Qi standard has a power transfer capability of up to 5W.
- 15. ADVANTAGES Protected connections - no corrosion when the electronics are all enclosed, away from water or oxygen in the atmosphere. Safer for medical implants - for embedded medical devices, allows recharging/powering through the skin rather than having wires penetrate the skin, which would increase the risk of infection. Durability - Without the need to constantly plug and unplug the device, there is significantly less wear and tear on the socket of the device and the attaching cable.
- 16. LIMITATIONS Lower efficiency, waste heat - The main disadvantages of inductive charging are its lower efficiency and increased resistive heating in comparison to direct contact. Slower charging - due to the lower efficiency, devices can take longer to charge when supplied power is equal. More costly - Inductive charging also requires drive electronics and coils in both device and charger, increasing the complexity and cost of manufacturing. Inconvenience - Can't be moved around or easily operated while charging
- 17. CONCLUSIONS Wireless power systems are constantly evolving as more and more practical options for conveniently charging smartphones and other mobile devices. User experience is the key factor that drives technology development, paving the way for safer and more convenient devices accompanying us in everyday life.
- 18. REFERENCES Espejel.J.D,”RF to DC power generation", University of Maryland, December 2003. http://drum.umd.edu:8003/dspace/handle/1903/173 https://en.wikipedia.org/wiki/Inductive_charging Electronics today magazine, June 2008th www.Howdostuffwork.com www.WhatIs.com