Linearized stability analysis and design of a flyback DC-DC boost regulator

Wester, Gene W.

doi:10.1109/pesc.1973.7065179

Cited by 2 publications

(2 citation statements)

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“…Feedback action controls the duty ratio of transistor switches Q a and Q b to make output voltage V o remain constant in the presence of changes in source voltage E s or load resistance Ri• Since the power-handling portion, indicated in Fig. 1 by heavy lines, of the regulator has been pre viously described (8) in detail, its operating characteristics are not discussed here. Phases "a" and "b" are identical but are staggered (offset) by 180· to reduce component values in the input and output filters.…”

Section: Circuit Desc Riptionmentioning

confidence: 99%

“…Although many exact methods of stability analysis have been evolved for linear systems, none are directly appli cable to switching regulators. However, a useful stability measure has been demonstrated (8) for switching regulators with a single feedback loop by applying the Nyquist criterion to the approximate loop gain determined by a time -averaging technique (9).…”

Section: Introductionmentioning

confidence: 99%

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Stability analysis and compensation of a boost regulator with two-loop control

Wester

1974

1974 IEEE Power Electronics Specialists Conference

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A describing-function approach to characterize analytically the frequency response and to design accordingly the feedback compensation of a staggered-phase boost regulator with two-loop control is presented. It is concluded analytically that the uncompensated major loop gain has a sig nificant frequency range where magnitude is inversely proportional to the square of frequency and where phase lag is approximately 180 degrees, so required phase-lead feedback compensation is designed. A comparison between computed and measured loop gains of the compensated major loop gain confirms the analytical model.

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Section: Circuit Desc Riptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%