Title :
Stability analysis of a switched mode inverter using ´Cuk converters
Author_Institution :
Dept. of Electr. Eng., Nat. Kaohsiung Inst. of Technol., Taiwan
Abstract :
A four-quadrant DC to AC switched-mode inverter, using a ´Cuk power converter, is analyzed. Also, a feedback loop is used to regulate the output voltage and produce purely sinusoidal voltage. First, a small signal dynamic model of the inverter is derived using the state-space averaging method. Then, based on this model, three approaches are used for the stability analysis: (1) frequency domain analysis. A Bode diagram is used to design the compensator and to determine the relative stability and bandwidth of the closed-loop system; (2) root locus analysis. According to the perturbation of the duty cycle the root loci are plotted. Using these plots, the behavior of the system is investigated; and (3) step response. This test is used to illustrate the relative stability and bandwidth of the system. Finally, some computer simulation and experimental results are presented
Keywords :
Bode diagrams; DC-AC power convertors; PWM invertors; closed loop systems; control system analysis; feedback; frequency-domain analysis; root loci; stability; state-space methods; step response; switched mode power supplies; voltage control; Bode diagram; Cuk power converter; bandwidth; closed-loop system; compensator design; computer simulation; duty cycle; experiments; feedback loop; four-quadrant DC/AC switched-mode inverter; frequency domain analysis; output voltage control; root loci; root locus analysis; small signal dynamic model; stability analysis; state-space averaging; step response; Analog-digital conversion; Bandwidth; Feedback loop; Frequency domain analysis; Inverters; Power system modeling; Stability analysis; Switching converters; System testing; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, PESC '94 Record., 25th Annual IEEE
Conference_Location :
Taipei
Print_ISBN :
0-7803-1859-5
DOI :
10.1109/PESC.1994.373766
