| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Outline of Final Research Achievements |
An adiabatic charging circuit, which has the characteristic of the gradual charging of a capacitor, was designed for realizing an energy storage system with a Lithium ion capacitor. The duty ratio of the switching transistors is digitally controlled by a microprocessor. The charging efficiency is defined as the ratio between the work done by the power supply and the increase in electrostatic energy of the capacitor. The work done by the power supply is calculated from the product of the charge amount flowing from the power supply and the power supply voltage. Using this circuit, it is clarified experimentally that the efficiency is 95.5 % during charging and also discharging process. Then the total efficiency is 91.2 % during one cycle, which is a good value for realizing energy storage systems.
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