A Fast and Exact Time-Domain Simulation of Switched-Mode Power Regulators

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33 Citations (Scopus)


A new approach for the time-domain simulation of switched-mode power regulators is developed. The concept of this approach is to model each switch element by a linear time-varying nodal equation, thus formulating a modified nodal equation system that describes the global dynamic behavior of the power regulator. By using the symbolic Laplace transform inversion, the time-domain expressions can be obtained in a closed and continuous form, which allows a fast and exact simulation of the system. The time efficiency of the proposed approach is testified by comparing with a standard numerical integration method. Various transient responses of a practical switched-mode power regulator due to the start-up, the step change in input voltage and the step change in reference voltage has been simulated. The simulations include the overcurrent protection limitation, the duty-cycle limitation control, the discontinuous conduction mode, and the continuous conduction mode of operation.

Original languageEnglish
Pages (from-to)341-350
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Issue number4
Publication statusPublished - 1992

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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