While the efficiency of power transfer may be low, the
concept of inductive
charging is no more "inefficient" in
terms of wasted energy than a
typical charger used now.
It will be nothing but a coil, arranged in an
appropriate
shape and embedded in a base. With nothing laid on the base,
there
should be an insignificant current flow due to the
impedance arising from the
inductance of the coil.
Certainly no more waste current would flow
through this
than is flowing through your cell phone charger that you
leave
plugged in all the time, even when not charging your
phone. Furthermore, an
appropriate sensor could detect when
there is no phone placed on the base and
eliminate even this
small leakage current.
Then when you set your phone
on the base of the wireless
charger, though of course the current flow will
increase, it
will be only to the extent that energy is transferred to the
phone - same as your old phone charger. However, it will not
be as efficient
in accomplishing the task of charging your
phone battery. The loose the
coupling between the coil in
the base and the coil in the receiver will mean it
will take
longer to charge your phone, unless you increase the voltage
or
frequency. Increasing the frequency will result in
increased energy losses due
to electromagnetic radiation,
while increasing only the voltage may not be
practical for a
range of reasons. [ Reply to This | Parent | # ]
|