A Proposal For WattUp™ Wireless

Charger

PRESENTED BY:-ASHUTOSH GADAVA

INTRODUCTION

• WattUp™ transmitter sends energy via radio waves to paired devices containing complimentary WattUp receivers. The receivers convert those radio waves into DC power, which in turn charges the receiver's battery.WattUp™ gives you the freedom to receive a charge from anywhere within a 30 foot space. WattUp™ wire-free charging works with a wide variety of electronic devices such as cell phones, tablets, wearables, cameras, wireless keyboards and mice, headsets, sensors, LED lights, remote controls and toys; in essence any battery-powered device in your home or office.

Objective:

• Our objective of project wireless charger device would be Wire-free charging of battery-powered devices(unto 10W) in your home or office.

Limitations

• Only 12 receiver devices can be managed at a time.• It can only deliver safe wire-free charging unto 5m(15ft).

How Does it Work?

• A Radio Frequency (RF) system, similar to a Wi-Fi system, delivers safe wire-free charging energy at a distance of up to 5m (15ft) from a transmitter to a receiver device, such as a mobile phone, and maintains charging while the receiver is in motion. 12 receiver devices can be managed by the system simultaneously.

The Hardware

• Highly targeted and dynamic pockets of energy are delivered via multiple miniature antenna arrays and custom control chips in the transmitter, or Power Router. Highly efficient energy harvesting of the micro energy beams from these pockets then takes place via paired antenna arrays and custom chips in the receiver devices.

The Software

• The WattUp™ software system ensures that the charging waveforms are dynamically directed, focused and controlled via proprietary algorithms. Charging and communication between transmitters and receivers is intelligently managed using Bluetooth Low Energy and enterprise-class wireless networking protocols.

Software feature highlights:-

• Pairs 1-12 devices with a WattUp™ transmitter• Establishes the order in which devices receive power• Sets specific levels of power to send to each device in 1/4W increments• Sets minimum power levels, so when a device reaches a certain level it

automatically receives power to prevent it from dying• Creates a schedule for charging, deciding what times of day to send power to

each device• Identifies whether a device receives a charge automatically or not• Determines whether or not a device receives a charge while in use• Tells the WattUp™ transmitter if a device has been plugged into a wall outlet.

Risk Analysis

• WattUp™ transmits over the same radio frequency spectrum used by Wi-Fi routers and cordless phones, both time-tested and well-proven technologies. This frequency is much less penetrative than a cellular phone signal.• The receiver antennas are distributed, unlike cellular antennas, and hence

the energy harvesting is also distributed, and not focused on any one hot-spot.• All of these provisions allow the WattUp system to deliver safe, efficient, and

mobile power to all of your battery powered devices in the home or office. The technology follows the same certification protocols required by mobile phones, Wi-Fi products and any consumer electronic product that communicates using a Radio Frequency signal.

Is it efficient?

• WattUp™ transmitters sense and communicate to authorized receiver devices via Bluetooth Low Energy (BLE) and only send power when needed, and requested by those devices. WattUp is software controlled, intelligently determining which devices receive power, when, and in what priority. If there are no authorized devices within range, the WattUp transmitter becomes idle and no power is wasted.

 RF spectrums being used by WattUp™

• 2.4GHz (Unlicensed) for Bluetooth Low Energy communication• 5.8GHz Industrial, Scientific & Medical (ISM) unlicensed band for

power transfer

Transmission power of WattUp™

• 4W delivered simultaneously to 4 devices, 0-5 feet • 2W delivered simultaneously to 4 devices, 5-10 feet • 1W delivered simultaneously to 4 devices, 10-15 feet • Delivering on average 2W to 4 devices simultaneously within the

charging envelope.• Power can be managed remotely via a web interface and allocated to

devices in 1⁄4 W increments with the band to a maximum of 12 devices at 1⁄4W.

 Charging time of a device using WattUp™• The WattUp™ system consists of a network of devices, and hence the

charging time is determined by the number of units being charged simultaneously as well as the allocation of available power to each device, and the distance to the transmitter.• <5 feet, with 4 devices calling for full power, devices charge at ~same

rate as being plugged into the wall• 5-10 feet, with 4 devices calling for full power, devices charge at ~same

rate as being plugged into a USB port on a computer• 10-15 feet, with 4 devices calling for full power, devices charge at ~1-2%

per minute, depending on the device and how much charge it has remaining.

Conclusion

Wattup wireless charger is basically a wire-free charger of battery powered electrical devices that use the Radio Frequency (RF) system which delivers energy via transmitter to receiver(i.e. any battery powered electrical device) within 30 ft. of area that gives you the freedom to roam where you want to without worrying about your mobile or battery powered devices running out of charge.

References:

• http://www.energous.com/overview/• http://www.engadget.com/2015/01/05/energous-wattup-wireless-ch

arging-demo/• http://www.geek.com/chips/wattup-router-can-beam-wireless-power

-to-12-devices-15-feet-away-1613121/• http://

www.theverge.com/2015/1/8/7518559/wattup-energous-wireless-charging-from-15-feet-away-ces-2015.