Fig. 1. Previous method for preventing sub-harmonic oscillation.
Fig. 2. The process of duty formation at different slopes.
Fig. 3. Inductor current in steady state.
Fig. 4. Block diagram of the proposed hybrid controller.
Fig. 5. A simulated waveform representing the response time of the output voltage at different controller.
Fig. 6. Inductor current simulation waveform when output voltage drop.
Fig. 7. Inductor current simulation waveform when the output voltage is raised.
Fig. 8. Experimental waveforms that show the response time of the output voltage on different controllers. (50V/div, 500msec/div)
Fig. 9. Experimental waveform of inductor current when output voltage drops. (10V/div, 1A/div, 50msec/div)
Fig. 10. Experimental waveform of inductor current when output voltage rises. (10V/div, 1A/div, 50msec/div)
Fig. 11. Experimental waveform of inductor current before output voltage changes. (10V/div, 1A/div, 25usec/div)
Fig. 12. Experimental waveform of inductor current after output voltage change. (10V/div, 1A/div, 25usec/div)
TABLE I SYSTEM PARAMETERS
참고문헌
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