Active Power Factor Correction Research  Modeling and Simulation

• If the actual circuit can be used, Why create equivalent circuit models?

  • The abrupt discontinuities that occur in the actual circuit as the switch transitions state forces the time step in the PSPICE simulation to extremely small increments.
  • These small increments mean an increased number of calculated points and equate to more convergence problems and significantly longer simulation times.

• What can be done?

  • We need an equivalent model that doesn’t exhibit the abrupt jumps seen in the actual circuit.
  • The means that the nonlinear elements (transistors and diodes) need to be replaced by equivalent components namely sources representing average electrical parameters.

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