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A family of interleaved boost converters and an original systematic derivation method based on the two-phase interleaved inverse-coupled inductor concept are proposed in this article for battery discharging in spacecraft applications. The family, including 14 converters, is generated by interconnecting multiple pulsating voltage cells through the energy storage cells. The basic pulsating voltage cells are derived from an inverse-coupled boost converter, and the energy storage cells include an inductor cell, tapped inductor cell, flyback cell, buck-current-fed cell, and partially current-fed cell. The proposed family of converters achieves high efficiency, step-up power conversion without the right-half-plane zero effect, continuous output current and low side switch driver. The operational principle and small-signal analysis of a representative topology in the proposed family of converters are discussed in detail. Moreover, experimental and simulation results are presented to verify the feasibility and effectiveness of the developed converter. Finally, the characteristics of the proposed family of converters are compared with other state-of-the-art converters. [ABSTRACT FROM AUTHOR]

This article presents an integrated magnetic buck–boost converter (IMBBC) with a positive output voltage. The input inductor, two power transfer inductors, and an auxiliary inductor in the ripple cancellation network of this converter are integrated in one magnetic core, and an additional capacitor is included for output current ripple cancellation. The IMBBC inherently operates in the continuous conduction mode and exhibits a nonpulsating input current and a very low ripple output current, thereby not only decreasing the current stress on both the input and output capacitors but also reducing the output voltage ripple. Because the input of the IMBBC is connected to the output during the switch-on period (similar to the operation of buck converters), the proposed IMBBC overcomes the right-half-plane zero problem in the buck or boost mode, thus achieving a higher dynamic performance. The use of the magnetic integration technique not only helped realize the aforementioned performance, but can also help reduce the weight and volume of dc–dc converters. Finally, the feasibility and effectiveness of the proposed topology and design approaches are experimentally verified. [ABSTRACT FROM AUTHOR]

A new bidirectional LCLL-type resonant dc-dc converter (LCLL-BDC) is proposed in this article, which features a wide output voltage range for both ports, thus achieving zero-voltage switching (ZVS) at the input side and zero-current switching (ZCS) at the output side. The snubberless converter is similar to the type-11 LLC-type resonant converter, with the exception of an additional inductor. The auxiliary inductor allows for the converter to achieve a wide voltage range power transfer, thus addressing the inability of the LLC-type converter to be boosted in the reverse mode. The equivalent model and the steady-state operation are presented in this article. Moreover, the design methodology for the resonant network was derived for the LCLL-BDC. A 1-kW prototype, which interfaces two batteries of different energy systems, was developed to verify the validity and applicability of the proposed converter. The input and output voltage range was found to be 80–120 V, and the highest efficiencies for the bidirectional operational modes exceeded 96%. [ABSTRACT FROM AUTHOR]

This paper presents a novel integrated magnetic three-port converter (IMTPC) with high power density and all three ports’ current ripple cancellation. The proposed IMTPC can interface one PV port, one bidirectional battery port, and one load port of the PV-battery dc power system. Only two high power magnetic devices are needed in an IMTPC for realizing power conversion, ripple cancellation, and switch driver simultaneously. Three extra capacitors were added to achieve three ports’ current ripple cancellation. Therefore, the port of the IMTPC will always in continuous-conduction mode with “zero current ripple,” thus, size of passive filter can be reduced and accuracy of maximum power point tracking can be improved. Meanwhile, simple driving of the high-side switch can be realized by integrated magnetic winding, which is responsible for MOSFET driver's voltage level shift. The using of the integrated magnetic technique not only performs aforementioned advantages but also shows great potential for reducing the weight and volume of the dc–dc converter. Finally, experimental verifications are given to illustrate the feasibility and effectiveness of the proposed topology and control method. [ABSTRACT FROM PUBLISHER]