Repozytorium publikacji - Politechnika Gdańska

We propose a use of a power amplifier in the circuit of voltage to current converter (current driver) for supercapacitor charging/discharging in controlled conditions. The current driver is controlled by DAC output of DAQ board and voltage of DUT is measured and a control loop is realized by software. In the circuit the DC current method of evaluation of capacitance and equivalent series resistance is used. The DUT is charged and discharged with constant current and capacitance C and equivalent serial resistance ESR are calculated from voltage curves. For test purpose commercially available supercapacitors were measured with different current values. The designed test circuit is a low-cost alternative for professional and semi-professional systems. It gives several advantages as easy control of charging current and possibility of applying various current patterns.

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