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Built-in Charger

Built-in charger
David Judbarovski, judbarovski@gmail.com, http://judbarovski.livejournal.com
[682]-2010/07/11

Key elements of the charger offered are piezoelectric converter PEC and ratchet gear moved by thin thread, wound off by hand muscle force from tiny bobbin fixed coaxial to the said ratchet gear and rotate it. The hand movements are quick and about 1 meter of length of the entire scope of arm, so a power generated by the movements would be up to about 100 watt or even more. A charging trip is formed by transforming the said gear rotation into pressure on the said PEC. A return trace is free resisted and provided by a small coil spring of the said ratchet gear. For the forces balancing purpose, we can use two opposite positioned PEC-s and a force pressed them can be up to 100 kg or more and limited by a breaking point of the PEC-s and a frame and the gear and other mechanics, so useful electric power can reach 60-70 watt for the most common and small and quite cheap PEC of lead titanate zirconate.
For storing of the said energy we must to use supercapacitors, because secondary battery needs in very long charging time. If the said supercapacitor is 10 Wh/kg, and its weight is limited by 10 g, so you can save 0.1 Wh only, is equal 360 Joule and can be charged in 6 seconds being enough for 12 minutes of work of common mobile device of 0.5 watt and needed in rechargeable battery of 1-2 g of weight only, if Li-ion.
 
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