Electronic Transformers and Circuits by R. Lee

By R. Lee

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Control of DC-DC converters with linear optimal feedback and nonlinear feedforward, IEEE Trans. Power Electronics, 9, 607, 1994. , Evaluation of synchronous-rectification efficiency improvement limits in forward converters, IEEE Transactions on Industrial Electronics, 42, 387, 1995. , Analysis and design of RCD clamp forward converter, in Proceedings of the VPEC’92, 1992, p. 198. L. , Fuzzy logic control for synchronous rectifier DC/DC converter, in Proceedings of the IASTED International Conference-ASC’00, Canada, 2000, p.

K. , Series-parallel resonant converter operating in discontinuous current mode-analysis, design, simulation, and experimental results, IEEE Transactions on Circuits and System, 47, 433, 2000. , Analysis and design of a series-parallel resonant converter with capacitive output filter, IEEE Transactions on Industry Applications, 27, 523, 1991. S. , Analysis and design of a high frequency resonant converter using LCC type Commutation, in Proceedings of IEEE Industry Applications Society Annual Meeting, 1986, p.

A particular circuitry analysis will be carried out in the next section. Usually, the two-element RPC has a very narrow response frequency band, which is defined as the frequency width ∆f between the two half-power points. Assume the resonant L-C circuit has inductance L and capacitance C, and the load is a pure resistive load R. fm Page 21 Thursday, September 22, 2005 7:23 AM Multiple Energy-Storage Element Resonant Power Converters 21 The normalized impedance Z0 and quality factor Q is Z0 = Q= L C Z0 = R ω L 1 L /R = 0 = ω 0 CR C R The frequency band width ∆f is ∆f = f0 Q If the quality factor is large, the frequency band width is narrow.

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