Uncertainty models for switch-mode DC-DC converters Article uri icon

abstract

  • Uncertainty models for the three basic switch-mode converters, buck, boost, and buck-boost, are given in this paper. The resulting models are represented by linear fractional transformations (LFT%27s) with structured dynamic uncertainties. Uncertainties are assumed for the load resistance R = Ro(1%2bδR), inductance L = Lo(1%2bδL), and capacitance C = Co(1%2bδC). The interest in these models is clearly motivated by the need to have models for switch-mode dc-dc converters that are compatible with robust control design, which require a model structure consisting of a nominal model, and a norm-bounded modeling uncertainty. Therefore, a robust controller design under parameter uncertainties can be obtained instead of the deterministic approach widely used.
  • Uncertainty models for the three basic switch-mode converters, buck, boost, and buck-boost, are given in this paper. The resulting models are represented by linear fractional transformations (LFT's) with structured dynamic uncertainties. Uncertainties are assumed for the load resistance R = Ro(1%2bδR), inductance L = Lo(1%2bδL), and capacitance C = Co(1%2bδC). The interest in these models is clearly motivated by the need to have models for switch-mode dc-dc converters that are compatible with robust control design, which require a model structure consisting of a nominal model, and a norm-bounded modeling uncertainty. Therefore, a robust controller design under parameter uncertainties can be obtained instead of the deterministic approach widely used.

publication date

  • 2000-01-01