Contents
How are batteries modeled in PSpice to discharge?
As shown in Figure 2 and Figure 3, the batteries are modeled using the following functional blocks: · Capacitor representing the A-H capacity of the cell. · Discharge rate normalizer to determine the lost capacity at high discharge rates. · A circuit to discharge the A-H capacity of the cell.
How is the capacitor in PSpice parameterized?
This capacitor is given the following value at the start of the simulation by PSpice’s Parameterization function: The capacitor, C_CellCapacity, is connected between nodes 50 and 0 and is given a value of the Amp-hour capacity of the cell times a conversion from hours to seconds (3,600 seconds = 1 hour) times a fudge factor ( FudgeFactor ).
How to calculate the transient response of a capacitor?
Use PSPICE and PROBE to obtain the transient response of the capacitor voltage and capacitor current separately on one page. In the Transient Analysis use a final value of 6 second. On the voltage graph add a trace at 63.2% of capacitor final voltage and use the cursor command to locate the circuit time constant.
How to get the circuit time constant from PSpice?
Use PSPICE and PROBE to obtain the natural response vc( t) and ic (t). From vc( t) obtain the circuit time constant. By inspection the initial voltage across the capacitor is given by v ( 0 ) = 8 volts, and the time constant of the circuit t = RC = 1 sec.
How to use the piece wise linear ( PWL ) PSpice?
Symbol Properties and example settings: Ti, where i=1,2..8. These are simulation time values. Vi, where i=1,2..8. These are voltages corresponding to the simulation time values. Example property settings: Symbol Properties and example settings:
What kind of interpolation is used in PSpice?
For in-between discharge values, PSpice uses linear interpolation between the table pairs. Note: The actual lookup tables are composed of 30 or more pairs of data to provide finer granularity of the resulting discharge voltage curve.