An Improved Weinberg Converter with Low Output Current and Voltage Ripple

Bae, Ji Hoon; Park, Jeong-Eon; Lee, Juyoung; Lee, Nayoung; Han, Sang‐Kyoo

doi:10.1109/iecon.2019.8927072

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…As illustrated in Figure 2, the electrical power system can be categorized as either a maximum power point tracking (MPPT) type or a direct energy transfer (DET) type [20]. According to the regulation of bus voltage, it can be categorized as a regulated bus of the DET type [21][22][23][24][25][26][27][28][29][30][31], an unregulated bus of the DET type [32,33], a regulated bus of the MPPT type [34,35], and an unregulated bus of the MPPT type [35][36][37][38]. To reduce bus voltage variations during the times of the sun and eclipses, the regulated bus is the most suitable for satellites demanding a high-quality power supply.…”

Section: Introductionmentioning

confidence: 99%

“…[45] shows the model predictive control-based charging algorith improving the charging time and the average temperature. Through [43][44][45], the life However, in the case of a regulated bus of the DET type [21][22][23][24][25][26][27][28][29][30][31], since the input of the converter is connected to the battery, there is the problem that the battery charging process cannot be finished through the converter's CV control. As illustrated in Figure 4, the output of BCR and BDR in the regulated bus of the DET type is connected to the bus, and the bus voltage is regulated through CV control.…”

Section: Introductionmentioning

confidence: 99%

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A Control Algorithm for Tapering Charging of Li-Ion Battery in Geostationary Satellites

Park

2023

Energies

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Recently, as the satellite data service market has grown significantly, satellite demand has been rapidly increasing. Demand for geostationary satellites with weather observation, communication broadcasting, and GPS missions is also increasing. Completing the charging process of the Li-ion battery during the sun period is one of the main tasks of the electrical power system in geostationary satellites. In the case of the electrical power system of low Earth orbit satellites, the Li-ion battery is connected to the DC/DC converter output, and the charging process is completed through CV control. However, in the case of the regulated bus of the DET type, which is mainly used in the electrical power system of geostationary satellites, a Li-ion battery is connected to the input of the DC/DC converter. Therefore, a method other than the CV control of the DC/DC converter is required. This paper proposes a control algorithm for tapering charging of the Li-ion battery in the regulated bus of the DET type for Li-ion battery charge completion operation required by space-level design standards. In addition, the proposed control algorithm is verified through an experiment on a geostationary satellite’s ground electrical test platform. The experiment verified that it has a power conversion efficiency of 99.5% from the solar array to the battery. It has 21 tapering steps at the equinox and 17 tapering steps at the solstice.

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