Title :
Open-loop dc and small-signal characteristics of PWM buck-boost converter for CCM
Author :
Kazimierczuk, Marian K.
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH
Abstract :
This paper introduces dc and small-signal circuit models for the PWM buck-boost converter that take into account parasitic components, such as the ESR of the fitter capacitor, the ESR of the inductor, the transistor on-resistance, and the diode forward resistance and offset voltage. Dc and small-signal circuit models for the buck-boost converter are introduced. The dc voltage transfer function and the efficiency of the converter are derived from the dc model. Small-signal open-loop characteristics are derived from the small-signal model. The obtained expressions are illustrated graphically for a converter whose component values were measured
Keywords :
equivalent circuits; linear network analysis; power convertors; pulse width modulation; state-space methods; transfer functions; CCM; ESR; PWM buck-boost converter; buck-boost converter; dc model; dc voltage transfer function; diode forward resistance; filter capacitor; offset voltage; open-loop characteristics; parasitic components; small-signal characteristics; small-signal circuit models; Circuits; Diodes; Impedance; Inductance; Paramagnetic resonance; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Transfer functions;
Conference_Titel :
Aerospace and Electronics Conference, 1994. NAECON 1994., Proceedings of the IEEE 1994 National
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-1893-5
DOI :
10.1109/NAECON.1994.333001
