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首页> 外文期刊>Journal of Electronic Materials >A Power Conditioning Stage Based on Analog-Circuit MPPT Control and a Superbuck Converter for Thermoelectric Generators in Spacecraft Power Systems
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A Power Conditioning Stage Based on Analog-Circuit MPPT Control and a Superbuck Converter for Thermoelectric Generators in Spacecraft Power Systems

机译：基于模拟MPPT控制和Superbuck转换器的功率调节级，用于航天器动力系统中的热电发电机

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摘要

A thermoelectric generator (TEG) is a very important kind of power supply for spacecraft, especially for deep-space missions, due to its long lifetime and high reliability. To develop a practical TEG power supply for spacecraft, a power conditioning stage is indispensable, being employed to convert the varying output voltage of the TEG modules to a definite voltage for feeding batteries or loads. To enhance the system reliability, a power conditioning stage based on analog-circuit maximum-power-point tracking (MPPT) control and a super-buck converter is proposed in this paper. The input of this power conditioning stage is connected to the output of the TEG modules, and the output of this stage is connected to the battery and loads. The superbuck converter is employed as the main circuit, featuring low input current ripples and high conversion efficiency. Since for spacecraft power systems reliable operation is the key target for control circuits, a reset-set flip-flop-based analog circuit is used as the basic control circuit to implement MPPT, being much simpler than digital control circuits and offering higher reliability. Experiments have verified the feasibility and effectiveness of the proposed power conditioning stage. The results show the advantages of the proposed stage, such as maximum utilization of TEG power, small input ripples, and good stability.
机译：热电发电机（TEG）使用寿命长且可靠性高，因此是航天器特别是深空飞行任务的一种非常重要的电源。为了开发适用于航天器的实用TEG电源，必须使用功率调节级，以将TEG模块的变化输出电压转换为确定的电压，以便为电池或负载供电。为了提高系统的可靠性，本文提出了一种基于模拟电路最大功率点跟踪（MPPT）控制和超级降​​压转换器的功率调节级。该功率调节级的输入连接到TEG模块的输出，该级的输出连接到电池和负载。超级降压转换器用作主电路，具有低输入电流纹波和高转换效率的特点。由于对于航天器动力系统而言，可靠的操作是控制电路的关键目标，因此基于复位触发器的模拟电路被用作实现MPPT的基本控制电路，它比数字控制电路简单得多，并具有更高的可靠性。实验已经验证了所提出的功率调节阶段的可行性和有效性。结果表明了所提出阶段的优势，例如最大程度地利用了TEG功率，输入纹波小，稳定性好。

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