Optimized phase positioning for minimizing input filter requirements in single-input multiple-output DC-DC switch-mode power supplies

Weinstein, Jason; Huerta, Santa C.; Mincey, Jeff; Moussaoui, Zaki

doi:10.1109/apec.2014.6803347

Cited by 5 publications

(7 citation statements)

References 17 publications

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“…If the output voltages are different, then the duty cycles and the peak-to-peak values of the input current ripples will be different. In such systems we can optimize the phase delay of the converters to improve the noise reduction of the interleaving [3].…”

Section: Discussionmentioning

confidence: 99%

“…In the case of two interleaved converters their input current ripples will be 180 degree out of phase, so they will cancel each other on the power bus [1]- [4]. The frequency of the summarized input current will be twice of the original, which can be filtered out with a smaller capacitor [3]. In the following chapters we will present the effects of the distributed interleaving with a setup consisting of two Buck converters.…”

Section: Introductionmentioning

confidence: 99%

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Conducted emission simulation and measurement of interleaved DC-DC converters

Konig¹,

Nagy²

2022

Infocommunications journal

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Switching-Mode Power Supplies (SMPS) are often used to power on-board satellite payloads due to their good conversion efficiency. However, they emit radiated and conducted noise, which can disturb the operation of other payloads. The current ripple sum of the power supplies will appear on the power bus. There are many methods to reduce this summarized noise, one of them is to interleave the on-switching times of the converters. This ripple cancellation method can decrease the noise component on the switching frequency and on its upper harmonics. In this article we are going to demonstrate the effects of the distributed interleaving with a measurement platform consisting of two Pulse Width Modulation (PWM) controlled Buck controllers.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conducted emission simulation and measurement of interleaved DC-DC converters

Konig¹,

Nagy²

2022

Infocommunications journal

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“…To decrease the size and mass of these filter components, the switching frequency of the converters can be increased; however, in this case, the conversion efficiency may also decrease due to higher AC losses [2]. Another method is to interleave the operation of multiple converters, i.e., if two or more converters are connected to the same power bus-such as in a satellite power system-then these converters can be synchronized to the same clock signal, but with different phases [5][6][7][8][9]. In cases with two converters, they will be running on the same switching frequency, but there will be a 180 • phase shift between their switch-on times.…”

Section: Of 14mentioning

confidence: 99%

An Experimental EMC Investigation of On-Board Interleaved Buck Converters

Nagy

Konig

2023

Energies

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On board a satellite, there are different devices that operate from a common energy source called a power bus. Since there are many devices connected to the same power bus and they are in the close vicinity of each other, it is important that they are able to function adequately in the electromagnetic environment of the satellite without introducing intolerable electromagnetic interference to other devices. On-board devices often require voltage levels different from the bus voltage to function, and this is often produced by switching-mode power supplies (SMPS). Their switching-mode operation guarantees that there is less power loss during conversion; however, they also emit conducted and radiated noises into the direction of the power bus and the payloads. In the case of multiple SMPS powered by the same power bus, we can interleave their switching periods. Thus, their noises will cancel each other out on their common input. In this study, we are going to demonstrate the noise reduction of the interleaving method with a setup consisting of two DC-DC converters connected to a simulated power bus.

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“…However, under light load or load step for the main branch, the converter will lead to a large voltage fluctuation to other branch sharing the coupling transformer. Given to the transferred power to the secondary side, most current will be assigned to the branch with the smallest leakage inductance, therefore, by making suitable various configuration of inductance for different branches, which is proportional to square of the turns ratio, and greater than the leakage inductance can effectively the influence of various cross regulation [9].…”

Section: Introductionmentioning

confidence: 99%

“…High frequency transformer can effectively realize step down the input voltage with different controlled switch devices. Commonly, fly back converter was often applied to design different kinds of auxiliary power, or applied to small power conditions [9][10][11]. Each output voltage was realized by matching the by turns ratio between the output voltage of main path, to make the final output voltage stability.…”

Section: Introductionmentioning

confidence: 99%

Multi-output current source with ripple cancellation by optimal magnetic components

Zhang¹,

Zhang²,

Liu³

2016

Proceedings of the 2016 International Conference on Advanced Electronic Science and Technology (AEST 2016)

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Abstract. High integration, high power density has become the development trend of power supply. Computer, automobile and aviation often require multiple output power, in order to meet all kinds of load, and the filter of current type output for the power supply should be a larger challenge. The input voltage becomes wide and high, and each output is low voltage with large current. Compared to the non-isolation topologies, isolation topologies have better ability of step-up/down. In this paper, the two-stage converter structure is used, in which the forward stage is used to step down the amplitude of the input voltage, and the backward stage achieved precisely multiple current output with independent control. Also optimization and design of the transformer and output filters have been made clearly, to solve the problems of cross regulation, stability, and dynamic response in traditional structure. Finally, four-currentoutput prototype with 80-100V input, 8A/10V, 8A/10V, 6A/20V, and 6A/20V outputs is built, and the analysis is verified by the experimental results.

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Optimized phase positioning for minimizing input filter requirements in single-input multiple-output DC-DC switch-mode power supplies

Cited by 5 publications

References 17 publications

Conducted emission simulation and measurement of interleaved DC-DC converters

Conducted emission simulation and measurement of interleaved DC-DC converters

An Experimental EMC Investigation of On-Board Interleaved Buck Converters

Multi-output current source with ripple cancellation by optimal magnetic components

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