Abstract
This paper presents a voltage-fed three-phase push-pull dc-dc converter. The main characteristics of the proposed converter are: small volume, low weight, reduced number of components, low voltage across the power semiconductors for duty cycles less than 1/3, and input current ripple cancellation when the duty cycle is equal to 1/3. Typical applications include battery chargers, electric vehicles, and renewable energy systems. The paper presents a theoretical analysis, design example, and experimental data for a 650 W, 150-125 VDC input, 75 VDC output, and 42 kHz switching frequency laboratory prototype. The measured performance agreed well with the theoretical predictions. The measured efficiency for 125 VDC input at full load is 95%.
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