Equivalent parameter test of capacitor

What s parameters are used for capacitor measurements?

For S parameters measurements VNA Rohde and Schwarz ZVRE is used. Necessary capacitor parameters are then extracted from the S parameters measured. The measurements are done in the frequency range 100 kHz – 500 MHz, with VNA intermediate frequency filter bandwidth of 300 Hz and 1600 points per sweep.

Are there equivalent circuit models of lithium-ion capacitor?

Two equivalent circuit models of lithium-ion capacitor are established. The assumptions and preconditions of the two-branch model are deeply analyzed. A new parameter identification method is proposed for the two-branch model. Experimentation and simulation are compared under more complete working condition.

Which technique is best suited for capacitor FRES measurement?

The best suited technique for capacitor fres measurement is the shunt-through technique, because measurement accuracy of capacitor impedance at fres and in the vicinity of it is very good (even below 1%) and this technique is less sensitive to the experimental setup parasitics.

How to calculate capacitance?

The value of capacitance (C) can be calculated by charge approach, where Δ V1 is the voltage increment. Since the test is constant current charging procedure, the calculation of charge amount could be simplified, where Δ t is the charging time and I is the charging current, as shown in (2).

How to measure capacitor & inductor parameters in broad frequency range?

For capacitor and inductor parameters measurements in broad frequency range usually impedance analyzers are used – . However the impedance analyzers are expensive and the measurement frequency range is usually limited up to several hundreds of MHz , , .

What is the ideal capacitor Cs?

The ideal capacitor C s is influenced by the lead inductance L s (of the order of several nH) and the track resistance R s (typ. of the order of 20 mΩ … 100 mΩ, for cold electrolyte capacitors up to 1 Ω). At low frequencies the capacitive component predominates, at the self-resonant frequency the track resistance is measurable.