SERIES ELECTRIC DOUBLE-LAYER CAPACITOR DEVICE
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United States of America Patent
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Issued Date -
Jun 10, 2010
app pub date -
Jul 14, 2006
filing date -
Aug 1, 2005
priority date (Note) -
Abandoned
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Abstract
[Problems] To provide a series electric double-layer capacitor device having a simple structure eliminating nonuniform voltages induced among electric double-layer capacitors (C1 to C6). [Means for Solving Problems] A series electric double-layer capacitor device comprises 2n capacitors (C1 to C6), 2n diodes (D1 to D6), a transformer (T1), and an inverter (31). Secondary wirings (N1 to N3) of the transformer supply the induced voltages to a capacitor module (30) composed of sets of two capacitors and two diodes. The capacitors are charged when the diodes included in the capacitor module are conductive. The series electric double-layer capacitor device further comprises voltage adjusting means (32) for changing the DC voltage level between terminals (1, 2), and the inverter converts the voltage-changed DC voltage into an AC voltage. A voltage for canceling the forward voltage drops of the diodes is added to the induced voltages of the secondary wirings by the operation of the voltage adjusting means. The influence of the diodes of when the capacitors are charged is eliminated, and the voltages among capacitors are made uniform.
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