Middlebrook, R. D. (1984) Transformerless DC-to-DC Converters with Large Conversion Ratios. In: International Telecommunications Energy Conference, 1984. INTELEC '84. IEEE , Piscataway, NJ, pp. 455-460. https://resolver.caltech.edu/CaltechAUTHORS:20160408-121238318
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Abstract
A new switching dc-to-dc converter is introduced in which large voltage step-down ratios can be achieved without a very small duty ratio and without a transformer. The circuit is an extension of the Ćuk converter to incorporate a multistage capacitor divider. A particularly suitable application would be a 50V to 5V converter in which dc isolation is not required. The absence of a transformer and a larger duty ratio permits operation at very high switching frequency, and makes the circuit amenable to partial integration and hybrid construction techniques. An experimental three-stage voltage divider Ćuk converter converts 50V to 5V at 50W with an efficiency of 77% at 500 kHz and 71% at 1 MHz, higher than for a basic Ćuk converter operated at the same conditions.
Item Type: | Book Section | ||||||||||
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Additional Information: | © 1984 IEEE. This work was conducted under the Power Electronics Program, supported by grants from the General Telephone Co. and from Emerson Electric Co. A patent application has been filed on the voltage-divider Ćuk converter circuit. All of the experimental work, and the derivation of the small-signal model, for the voltage-divider Ćuk converter was done by Steve Freeland, a graduate student in the Caltech Power Electronics Group. He was supported by a National Science Foundation Fellowship. | ||||||||||
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DOI: | 10.1109/INTLEC.1984.4794165 | ||||||||||
Record Number: | CaltechAUTHORS:20160408-121238318 | ||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20160408-121238318 | ||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||
ID Code: | 66025 | ||||||||||
Collection: | CaltechAUTHORS | ||||||||||
Deposited By: | Kristin Buxton | ||||||||||
Deposited On: | 13 Apr 2016 18:29 | ||||||||||
Last Modified: | 10 Nov 2021 23:52 |
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