This isn't really a home repair question, more a educational matter! We
recently started using a Sonicare cordless electric toothbrush. The
'handle" fits in a recharger stand as expected - nothing unusual about that.
The question is, how does this work? There are no contacts on the brush or
in the stand! I'm sure it's not magic, but it is interesting! I wonder if
this technology will find its way to cellphones and other rechargeable
devices that still need contacts that get corroded.
If there are indeed no contacts (are you -sure-" lol) then
they're likely passing AC between the two pieces instead of
DC, as is the case with most chargers. You can couple AC
without physical contact if you orient the 2 pieces correctly
and design them properly. That's how a transformer works.
The wires from both sides of the transformer never actually
touch inside the unit, they just pass current inductively
because of the way they are arranged.
Just off the top of my head, I could see how that technology
could crossover to other devices, but (again, just at first
thought) there -might- be some reasons that you wouldn't want
to try it with Radio Frequency devices like Cell Phones.
TP / Network Man __________________________________
If u want the races for free,
Like they said - it's a simple transformer. The primary windings are in the
stand, the secondaries in the tooth brush so that they line up in close
proximity when the brush is on the stand. The conversion to DC takes place
inside the brush (diode or rectifier) where it chargers the battery.
This type of appliance is becoming more and more common. I have two
different tooth brushes that work like this. You are right is just a
simple transformer. Older types have a transformer and a rectifier in
the base and toothbrush simply has electrical contacts and a battery.
The new ones put all the stuff in the tooth brush except one half of
John W wrote:
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.