Environmental Engineering Reference
In-Depth Information
Lightbulb
Load 2
Load and
Receiving
Coil 1
LED Load 1
Load and
Receiving
Coil 2
Source and
Transmitting
Coil
FIGURE 6.25
Powering multiple loads and effect of extraneous objects.
nature of resonance dictates that resonant objects interact very weakly with
other nonresonant extraneous objects such that very little electrical energy is
lost.
6.2.4.2 Network of WPT Resonator Coils
Another objective of this WPT research was to network the designed high-
efficiency WPT resonator coils together to achieve the ultimate goals of wire-
less and batteryless electronic products. The designed resonator coils were
networked together, as illustrated in Figure 6.26 , such that each resonator
coil in the network received and relayed electrical power from and to its
neighbouring resonator coil in accordance with the WPT routes illustrated by
dotted lines in Figure 6.26 .
Referring to Figure 6.26 , the mobile gadgets (e.g., camera, iPhone, laptop,
etc.) were equipped with resonator coils, and whenever these mobile gadgets
entered the room or rather the WPT network, they would be charged. In
the midst of charging, the resonator coil also played the role of relaying the
received electrical power to its nearby mobile gadget. By doing so, it was
possible to reduce the wireless power transmission distance between each
gadget; hence, the form factor of the resonator coil could be smaller to fit
into the mobile gadget. It was thus more viable to utilize WPT technology as
a self-sustaining portable energy source for the mobile gadgets. Figure 6.27
shows the powering of an LED at a separation distance of 60 cm away from
the source and transmitting coil by using a network of resonator coils (i.e.,
resonators #1 and #2).
 
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