Title :
Linearization of the control-to-output transfer function for a PWM buck-boost converter
Author :
Lo, Yu-Kang ; Yen, Shang-Chin ; Wang, Jan-Ming
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
A new method for linearizing the control-to-output transfer function of a PWM buck-boost converter is presented in this paper. The DC and the small-signal characteristics are derived. A compensating signal relating to the inverse of the nonlinear term appeared in the control-to-output transfer function is produced from the duty ratio, and then fed into the feedback loop. Experimental results show that the linearity is retained between the duty ratio and the output voltage by adopting the proposed feedback scheme.
Keywords :
PWM power convertors; linearisation techniques; nonlinear control systems; transfer functions; PWM buck-boost converter; control-to-output transfer function linearization; feedback loop; signal compensation; Equations; Feedback loop; Inductors; Linearity; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Transfer functions; Voltage control; PWM buck-boost converter; function; linearization; the control-to-output transfer;
Conference_Titel :
Industrial Electronics, 2004 IEEE International Symposium on
Print_ISBN :
0-7803-8304-4
DOI :
10.1109/ISIE.2004.1571928
