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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 deals with the negative effects produced by unexpected energy of solar array and methods of suppressing the effects for the sequential switching shunt regulator (S3R). The complex space operation conditions, such as plasma environment and accidental impact are likely to cause abnormal discharge of solar array, leading to unexpected changes in the input energy of an S3R. Effects of unexpected energy on current stress and power loss of power devices, overregulation of the S3R and quality of output voltage are represented and analyzed in this article. A shunt regulator (SR) topology based on the switch current limiting drive is then proposed to suppress current stress and power loss of power devices, thereby alleviating negative effects. Finally, simulation and experimental results are provided to illustrate the negative effects of unexpected energy and validate the proposed SR. [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]