Why IR?22 January 2019
If you wanted to develop your own long-range wireless power system, you’d probably start by analyzing potential ways to send power from one side to another. Maybe you’ll consider magnetic fields, radio frequency waves, ultrasound, and of course light.
When we performed this analysis several years ago, our conclusion was that light offers the best combination of power, distance, efficiency, and safety. We covered many of these differences in a recent Webinar. See it here
Here are a few reasons:
|Infrared light||Radio Frequency Waves|
|Power||Up to several watts||Small number of miliwatts while remaining within safety limits|
|How power changes with distance||Nearly constant power regardless at distance||Power significantly diminishes with the square of the distance|
|Energy efficiency||High efficiency. In the Wi-Charge system, 100% of the transmitted energy reaches the receiver||Because of the physical properties of RF, only a small portion of transmitted power reaches the receiver.|
|Consumer safety||UL, FDA and IEC approval for the Wi-Charge system. Certified consumer device.||Regulatory approval is currently available only for micro-power systems. Excess RF radiation baths the environment.|
|Potential interference||Does not impact cellular, WiFi, Bluetooth or other communication networks||Potentially interferes with Wi-Fi, cordless and cellular communications|
|Type of energy||Natural light. IR is nature’s preferred way of energy delivery.||Man-made radiation. Living organisms are not accustomed to it.|
|Impact on users|
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