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New zero-voltage-switching constant-frequency PWM DC/DC convertor with low switch stress and wide linearity

New zero-voltage-switching constant-frequency PWM DC/DC convertor with low switch stress and wide linearity

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A new zero-voltage-switching (ZVS) DC/DC convertor which operates on constant frequency and has wide linearity is proposed. ZVS operations are achieved not only for the primary switches but also for the secondary rectifier diodes to reduce the switch stresses and losses. The proposed convenor also overcomes the other shortcomings of the conventional resonant DC/DC convertors such as high VA ratings of devices and passive components, load-dependent DC characteristics, etc.

References

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      • F.C. Schwarz . An improved method of resonant current pulse modulation for power converters. IEEE Trans. , 133 - 141
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      • R.L. Steigerward . High frequency resonant transistor dc-dc converter. IEEE Trans. , 181 - 191
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      • K. Liu , R. Oruganti , F.C. Lee . Quasi-resonant converters topologies and characteristics. IEEE Trans. , 62 - 71
    4. 4)
      • Nho, E.C., Cho, G.H.: `A new high performance zero-voltage zero-current mixed mode switching DC/DC converter', IEEE PESC Rec., 1989, p. 902–908.
    5. 5)
      • de Doncker, R.W., Divan, D.M., Kheraluwala, M.H.: `A three-phase soft-switched high power density DC/DC converter for high power applications', IEEE IAS Annual Meeting Rec., 1988, p. 796–804.
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