electric bicycle quick charger circuit

Published:2011/5/25 20:08:00 Author:John | Keyword: electric bicycle, quick charger | From:SeekIC

The AC220V electricity is stepped-down through transformer T1 and is regulated through the full-wave rectifier D1-D4. Thus the charging circuit is supplied to work. Then the output end is correctly accessed to the set recharged bottle. If each half-wave peak value of the rectifier output ripple voltage is higher than the output voltage of the battery, the thyristor SCR is triggered to conduct by the Q collector current. The current charges the battery through the SCR. When the pulsating voltage is close to battery voltage, the SCR is off and charging process stops. Conduction voltage for transistor Q can be adjusted by the regulation of R4. The R4 is generally adjusted, from large value to small value, to trigger SCR. LED D5 in the figure is used for the power indicator and D6 is used for charging instructions.



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