Title :
Influence of DC conversion ratio over small-signal performances of buck-boost programmable switching regulator
Author_Institution :
Fac. of Phys., Sofia Univ., Bulgaria
fDate :
10/1/1992 12:00:00 AM
Abstract :
The influence of DC conversion ratio on the dynamic characteristics of a PWM buck-boost programmable regulator using current-injected control (CIC) and the capability of the control scheme to improve performance of the regulator are investigated. The analysis is performed by applying the small-signal model of the regulator to a number of steady-state operating points. The comparison between small-signal characteristics obtained for the same operating points and for different system open-loop gains (SOLGs) is used to evaluate the capability of CIC to improve the performance of the regulator. The analysis shows that considerable improvements can be expected only for frequencies below unity SOLG cross-over frequency and for small DC conversion ratios
Keywords :
electric current control; power conversion; power convertors; pulse width modulation; switching circuits; DC conversion ratio; PWM; buck-boost programmable switching regulator; current-injected control; open-loop gains; small-signal performances; steady-state operating points; Frequency conversion; Open loop systems; Performance analysis; Performance evaluation; Performance gain; Power supplies; Pulse width modulation; Regulators; Steady-state; Voltage;
Journal_Title :
Industrial Electronics, IEEE Transactions on
