Title :
Switched Coupled-Inductor Cell for DC-DC Converters with Very Large Conversion Ratio
Author :
Axelrod, Boris ; Berkovich, Yefim ; Ioinovici, A.
Author_Institution :
Holon Inst. of Technol.
Abstract :
A novel switching structure formed by an externally controlled switch, a coupled inductor, and two synchronous switches (diodes) is proposed. The practical implications of the leakage inductance are considered. This structure is inserted into PWM DC-DC buck, boost, and buck-boost converters by replacing their switch and inductor. The results are new converters with very high step-up or step-down voltage gain. The new switching-mode power supplies are analyzed in steady-state. The energy accumulated in the leakage inductance is transferred to the output capacitor in a non-oscillatory manner. The influence of the magnetically-coupling coefficient on the dc gain is studied. Simulation and experimental results confirm the theoretical analysis and the advantages of the proposed converters
Keywords :
DC-DC power convertors; PWM power convertors; capacitors; inductors; switched mode power supplies; switching convertors; DC-DC converters; PWM DC-DC buck converters; boost converters; buck-boost converters; coupled inductor; leakage inductance; magnetically-coupling coefficient; output capacitor; switched coupled-inductor cell; switching-mode power supplies; synchronous switches; very large conversion ratio; DC-DC power converters; Diodes; Inductance; Inductors; Magnetic analysis; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Voltage;
Conference_Titel :
IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on
Conference_Location :
Paris
Print_ISBN :
1-4244-0390-1
DOI :
10.1109/IECON.2006.347593
